TY  - CONF
AU  - Maksimović, Ana
AU  - Petrovski, Blagoj
AU  - Milović, Ljubica
AU  - Aleksić, Bogdan
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/707
AB  - Most serious weldment failures have catastrophic consequences in terms of damage to other equipment,
loss of production, and risks to worker health and safety. For the above reasons, there is a tendency to find the
line between safety and disaster, and this requires a guarantee of the integrity of the welded structure even if a
crack is present.
The structural and mechauical heterogeneity of a welded joint affects its resistance to cracking in both the
elastic and plastic regions. Therefore, it is important to define the test method and the position of the fatigue
crack. The behavior of an elasto-plastic material, during stable crack growth can be described by the J-1\a
diagram. As the crack propagates, a point on the curve is defined, which represents the critical value of the Jintegral.
The aim of this experiment is to determine ne value and the procedure is reflected in the
determination of the R curve, i.e. the J-1\a curve, which consists of the value of the J integral for uniform
crack increments 1\a. In this paper, two SEN(B) specimens with the fatigue crack in the parent material (PM)
and weld metal (WM) were tested according to standard ASTM El820 at room temperature (RT) as well as
three specimens with the fatigue crack in the weld metal (WM) at RT, -20C, -30C.
C3  - 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023)
T1  - Experimental Determination of JIc for a HSLA Steel Welded Joint
SP  - 30
ER  - 

@conference{
author = "Maksimović, Ana and Petrovski, Blagoj and Milović, Ljubica and Aleksić, Bogdan and Aleksić, Vujadin and Bulatović, Srđan",
year = "2023",
abstract = "Most serious weldment failures have catastrophic consequences in terms of damage to other equipment,
loss of production, and risks to worker health and safety. For the above reasons, there is a tendency to find the
line between safety and disaster, and this requires a guarantee of the integrity of the welded structure even if a
crack is present.
The structural and mechauical heterogeneity of a welded joint affects its resistance to cracking in both the
elastic and plastic regions. Therefore, it is important to define the test method and the position of the fatigue
crack. The behavior of an elasto-plastic material, during stable crack growth can be described by the J-1\a
diagram. As the crack propagates, a point on the curve is defined, which represents the critical value of the Jintegral.
The aim of this experiment is to determine ne value and the procedure is reflected in the
determination of the R curve, i.e. the J-1\a curve, which consists of the value of the J integral for uniform
crack increments 1\a. In this paper, two SEN(B) specimens with the fatigue crack in the parent material (PM)
and weld metal (WM) were tested according to standard ASTM El820 at room temperature (RT) as well as
three specimens with the fatigue crack in the weld metal (WM) at RT, -20C, -30C.",
journal = "2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023)",
title = "Experimental Determination of JIc for a HSLA Steel Welded Joint",
pages = "30"
}

Maksimović, A., Petrovski, B., Milović, L., Aleksić, B., Aleksić, V.,& Bulatović, S.. (2023). Experimental Determination of JIc for a HSLA Steel Welded Joint. in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023), 30.

Maksimović A, Petrovski B, Milović L, Aleksić B, Aleksić V, Bulatović S. Experimental Determination of JIc for a HSLA Steel Welded Joint. in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023). 2023;:30..

Maksimović, Ana, Petrovski, Blagoj, Milović, Ljubica, Aleksić, Bogdan, Aleksić, Vujadin, Bulatović, Srđan, "Experimental Determination of JIc for a HSLA Steel Welded Joint" in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023) (2023):30.

TY  - CONF
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/703
AB  - Preparation for non-destructive testing (NDT), preparation of test reports, and control
calculation of a pressure vessel using the finite element method (FEM), with or without identified
irregularities, requires the use of commercial parametric modeling programs. 3D modeling
programs enable the determination of the most critical part of the pressure vessel construction
as well as the modeling of irregularities after the tests that occurred during the construction,
calculation, and exploitation of the pressure vessel construction itself.
Irregularities are reflected in the form of improperly performed welded joints, cracks, corrosion,
erosion or cavitation of materials, and are used for the preparation of test reports and control
calculations of the pressure vessels construction with and/or without identified irregularities and
defects, with the aim of making the correct decision on continued exploitation of the pressure
vessel construction or its degree of repair.
The possibility of an unlimited number of views, as well as the possibility of an unlimited number
of sections of the entire pressure vessel structure or its part, releases us from creating
complicated 2D sketches for the purpose of NDT or control calculation of the pressure vessel
FEM structure.
In connection with other computer programs or for the calculation of FEM (fracture mechanics,
fatigue), pressure vessel models made in 3D, enable the preparation of a quality test report with
the defined traceability and repeatability required by the SRPS ISO/IEC 17025 standard, as well
as the making of the correct decision on the exploitation and service life of the structure pressure
vessel.
C3  - VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023
T1  - Parametric programs for 3D modeling in the function of NDT and determining life of pressure vessels
SP  - 136
UR  - https://hdl.handle.net/21.15107/rcub_rims_703
ER  - 

@conference{
author = "Aleksić, Vujadin and Bulatović, Srđan and Zečević, Bojana and Maksimović, Ana and Milović, Ljubica",
year = "2023",
abstract = "Preparation for non-destructive testing (NDT), preparation of test reports, and control
calculation of a pressure vessel using the finite element method (FEM), with or without identified
irregularities, requires the use of commercial parametric modeling programs. 3D modeling
programs enable the determination of the most critical part of the pressure vessel construction
as well as the modeling of irregularities after the tests that occurred during the construction,
calculation, and exploitation of the pressure vessel construction itself.
Irregularities are reflected in the form of improperly performed welded joints, cracks, corrosion,
erosion or cavitation of materials, and are used for the preparation of test reports and control
calculations of the pressure vessels construction with and/or without identified irregularities and
defects, with the aim of making the correct decision on continued exploitation of the pressure
vessel construction or its degree of repair.
The possibility of an unlimited number of views, as well as the possibility of an unlimited number
of sections of the entire pressure vessel structure or its part, releases us from creating
complicated 2D sketches for the purpose of NDT or control calculation of the pressure vessel
FEM structure.
In connection with other computer programs or for the calculation of FEM (fracture mechanics,
fatigue), pressure vessel models made in 3D, enable the preparation of a quality test report with
the defined traceability and repeatability required by the SRPS ISO/IEC 17025 standard, as well
as the making of the correct decision on the exploitation and service life of the structure pressure
vessel.",
journal = "VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023",
title = "Parametric programs for 3D modeling in the function of NDT and determining life of pressure vessels",
pages = "136",
url = "https://hdl.handle.net/21.15107/rcub_rims_703"
}

Aleksić, V., Bulatović, S., Zečević, B., Maksimović, A.,& Milović, L.. (2023). Parametric programs for 3D modeling in the function of NDT and determining life of pressure vessels. in VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023, 136.
https://hdl.handle.net/21.15107/rcub_rims_703

Aleksić V, Bulatović S, Zečević B, Maksimović A, Milović L. Parametric programs for 3D modeling in the function of NDT and determining life of pressure vessels. in VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023. 2023;:136.
https://hdl.handle.net/21.15107/rcub_rims_703 .

Aleksić, Vujadin, Bulatović, Srđan, Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, "Parametric programs for 3D modeling in the function of NDT and determining life of pressure vessels" in VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023 (2023):136,
https://hdl.handle.net/21.15107/rcub_rims_703 .

TY  - CONF
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/705
AB  - The operating temperature influence on the fatigue crack growth parameter, was analyzed by testing the
chromium-molybdenum steel for elevated temperatores application of the new generation additionally alloyed with
vanadium. The paper presents a comparison of the fatigue threshold value AKa, and the fatigue crack growth rate
da/dN of the specimens cutting from pipe made of virgin steel, tested at room (RT) and operating (liT) temperatore
of540 °C. The influence of the notch and crack initiation location, as well as the test temperature values, have a
decisive effect on the fatigue threshold values AKth of the investigated steel.
The macroscopic and microscopic specimens' fracture surfaces are also shown. Obtained results of fatigue
crack growth parameter, correspond to the SEM micrographs of fractured surfaces.
C3  - 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023)
T1  - Fatigue crack growth rate of a low carbon microalloyed steel for elevated temperature application
SP  - 27
UR  - https://hdl.handle.net/21.15107/rcub_rims_705
ER  - 

@conference{
author = "Zečević, Bojana and Maksimović, Ana and Milović, Ljubica and Aleksić, Vujadin and Bulatović, Srđan",
year = "2023",
abstract = "The operating temperature influence on the fatigue crack growth parameter, was analyzed by testing the
chromium-molybdenum steel for elevated temperatores application of the new generation additionally alloyed with
vanadium. The paper presents a comparison of the fatigue threshold value AKa, and the fatigue crack growth rate
da/dN of the specimens cutting from pipe made of virgin steel, tested at room (RT) and operating (liT) temperatore
of540 °C. The influence of the notch and crack initiation location, as well as the test temperature values, have a
decisive effect on the fatigue threshold values AKth of the investigated steel.
The macroscopic and microscopic specimens' fracture surfaces are also shown. Obtained results of fatigue
crack growth parameter, correspond to the SEM micrographs of fractured surfaces.",
journal = "2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023)",
title = "Fatigue crack growth rate of a low carbon microalloyed steel for elevated temperature application",
pages = "27",
url = "https://hdl.handle.net/21.15107/rcub_rims_705"
}

Zečević, B., Maksimović, A., Milović, L., Aleksić, V.,& Bulatović, S.. (2023). Fatigue crack growth rate of a low carbon microalloyed steel for elevated temperature application. in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023), 27.
https://hdl.handle.net/21.15107/rcub_rims_705

Zečević B, Maksimović A, Milović L, Aleksić V, Bulatović S. Fatigue crack growth rate of a low carbon microalloyed steel for elevated temperature application. in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023). 2023;:27.
https://hdl.handle.net/21.15107/rcub_rims_705 .

Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, Aleksić, Vujadin, Bulatović, Srđan, "Fatigue crack growth rate of a low carbon microalloyed steel for elevated temperature application" in 2nd International Symposium on Risk Analysis and Safety of Complex Structures and Components (IRAS 2023) (2023):27,
https://hdl.handle.net/21.15107/rcub_rims_705 .

TY  - CONF
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/704
AB  - To evaluate the behavior of a homogeneous material in the presence of a crack-type defect, the
value of the critical stress-intensity factor, KIc, was determined as a measure of the fracture
toughness of the tested steel under the conditions of a plane stress state, at two test temperatures,
20 C and 540 C. The experiments were carried out using the method of testing one specimen with
successive partial unloading, which aims to r
occurs during the test. In addition to the experimental analysis, a numerical simulation of the
behavior of the specimens under static and dynamic loading was performed. The numerical analysis
is based on the experimentally obtained yield strength and tensile strength values of the investigated
steel, and was done in Ansys Workbench R21 software package, which relies on finite element
method, FEM. The results obtained by numerical analysis showed good agreement with the
experimentally obtained results of the J-integral for specimens tested at room and elevated
temperature. Good agreement with the experimental results was shown, confirming the use of FEM for the load cases considered.
C3  - VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023
T1  - Experimental determination and numerical validation of the critical value of the J-integral ofa low carbon microalloyed steel for elevated temperature application
SP  - 221
UR  - https://hdl.handle.net/21.15107/rcub_rims_704
ER  - 

@conference{
author = "Zečević, Bojana and Maksimović, Ana and Milović, Ljubica and Aleksić, Vujadin and Bulatović, Srđan",
year = "2023",
abstract = "To evaluate the behavior of a homogeneous material in the presence of a crack-type defect, the
value of the critical stress-intensity factor, KIc, was determined as a measure of the fracture
toughness of the tested steel under the conditions of a plane stress state, at two test temperatures,
20 C and 540 C. The experiments were carried out using the method of testing one specimen with
successive partial unloading, which aims to r
occurs during the test. In addition to the experimental analysis, a numerical simulation of the
behavior of the specimens under static and dynamic loading was performed. The numerical analysis
is based on the experimentally obtained yield strength and tensile strength values of the investigated
steel, and was done in Ansys Workbench R21 software package, which relies on finite element
method, FEM. The results obtained by numerical analysis showed good agreement with the
experimentally obtained results of the J-integral for specimens tested at room and elevated
temperature. Good agreement with the experimental results was shown, confirming the use of FEM for the load cases considered.",
journal = "VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023",
title = "Experimental determination and numerical validation of the critical value of the J-integral ofa low carbon microalloyed steel for elevated temperature application",
pages = "221",
url = "https://hdl.handle.net/21.15107/rcub_rims_704"
}

Zečević, B., Maksimović, A., Milović, L., Aleksić, V.,& Bulatović, S.. (2023). Experimental determination and numerical validation of the critical value of the J-integral ofa low carbon microalloyed steel for elevated temperature application. in VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023, 221.
https://hdl.handle.net/21.15107/rcub_rims_704

Zečević B, Maksimović A, Milović L, Aleksić V, Bulatović S. Experimental determination and numerical validation of the critical value of the J-integral ofa low carbon microalloyed steel for elevated temperature application. in VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023. 2023;:221.
https://hdl.handle.net/21.15107/rcub_rims_704 .

Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, Aleksić, Vujadin, Bulatović, Srđan, "Experimental determination and numerical validation of the critical value of the J-integral ofa low carbon microalloyed steel for elevated temperature application" in VIII INTERNATIONAL CONGRESS ENGINEERING, ENVIRONMENT AND MATERIALS IN PROCESS INDUSTRY EEM 2023 (2023):221,
https://hdl.handle.net/21.15107/rcub_rims_704 .

TY  - CONF
AU  - Maksimović, Ana
AU  - Zečević, Bojana
AU  - Milović, Ljubica
AU  - Aleksić, Vujadin
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/677
AB  - The first industrial application of elevated and high-strength steel in the form of hot-rolled strips and sheets
was the manufacture of pipes and vessels under pressure, as it was possible to reduce the thickness, i.e. to
reduce the weightof welded structures. The high-strength low-alloy steels used today are usually obtained by
suitable chemical composition and thermomechanical treatment.
Our investigated steel NIOMOL 490 K belongs to the class of molybdenum microalloyed steels, where the
microalloying with molybdenum serves to increase the heat resistance of the steel and at the same time
strengthen the influence of other alloying elements. This steel grade is designed for the manufacture of welded
pressure vessels fabrication and is mainly used for dynamic loading conditions at low operating temperatures.
In the present paper, the tensile and hardness tests were used to determine the effects of alloying elements
on the mechanical properties of NIOMOL 490K steel in the temperature range from -60°C to +60°C.
PB  - University of Belgrade - Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies, CNN Tech, The Book of Abstracts
T1  - Effects of Alloying Elements on the Properties of HSLA Steel
SP  - 23
UR  - https://hdl.handle.net/21.15107/rcub_rims_677
ER  - 

@conference{
author = "Maksimović, Ana and Zečević, Bojana and Milović, Ljubica and Aleksić, Vujadin",
year = "2023",
abstract = "The first industrial application of elevated and high-strength steel in the form of hot-rolled strips and sheets
was the manufacture of pipes and vessels under pressure, as it was possible to reduce the thickness, i.e. to
reduce the weightof welded structures. The high-strength low-alloy steels used today are usually obtained by
suitable chemical composition and thermomechanical treatment.
Our investigated steel NIOMOL 490 K belongs to the class of molybdenum microalloyed steels, where the
microalloying with molybdenum serves to increase the heat resistance of the steel and at the same time
strengthen the influence of other alloying elements. This steel grade is designed for the manufacture of welded
pressure vessels fabrication and is mainly used for dynamic loading conditions at low operating temperatures.
In the present paper, the tensile and hardness tests were used to determine the effects of alloying elements
on the mechanical properties of NIOMOL 490K steel in the temperature range from -60°C to +60°C.",
publisher = "University of Belgrade - Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies, CNN Tech, The Book of Abstracts",
title = "Effects of Alloying Elements on the Properties of HSLA Steel",
pages = "23",
url = "https://hdl.handle.net/21.15107/rcub_rims_677"
}

Maksimović, A., Zečević, B., Milović, L.,& Aleksić, V.. (2023). Effects of Alloying Elements on the Properties of HSLA Steel. in International Conference of Experimental and Numerical Investigations and New Technologies, CNN Tech, The Book of Abstracts
University of Belgrade - Faculty of Mechanical Engineering., 23.
https://hdl.handle.net/21.15107/rcub_rims_677

Maksimović A, Zečević B, Milović L, Aleksić V. Effects of Alloying Elements on the Properties of HSLA Steel. in International Conference of Experimental and Numerical Investigations and New Technologies, CNN Tech, The Book of Abstracts. 2023;:23.
https://hdl.handle.net/21.15107/rcub_rims_677 .

Maksimović, Ana, Zečević, Bojana, Milović, Ljubica, Aleksić, Vujadin, "Effects of Alloying Elements on the Properties of HSLA Steel" in International Conference of Experimental and Numerical Investigations and New Technologies, CNN Tech, The Book of Abstracts (2023):23,
https://hdl.handle.net/21.15107/rcub_rims_677 .

TY  - CONF
AU  - Aleksić, Vujadin
AU  - Zečević, Bojana
AU  - Bulatović, Srđan
AU  - Maksimović, Ana
AU  - Milović, Ljubica
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/681
AB  - Pipelines, with specifics in design, construction, testing and safety requirements must be designed
based on all relevant influences to ensure that they are safe during their working life. Allowable
stresses must be limited by possible errors in working conditions, in order to completely eliminate
the uncertainty arising from the production, the calculation model, the actual working conditions and
the characteristics and behavior of the material. In the paper, on the example of modeling and
calculation of the corrosion-damaged structure of the ammonia (NH3) transfer pipeline, a
methodological approach to the calculation using the Finite Element Method (FEM), is shown, in
accordance with the methods defined by the new and general approach to standardization and
technical harmonization for pressure equipment (Pressure Equipment Directive - PED 97/23 EC).
The paper uses advanced modeling techniques of corroded surfaces, based on FEM, with the aim of
developing a procedure for assessing the residual strength of steel pipelines operating in the
environmental conditions of the chemical products industry. The presentation of possible damages
and consequences caused by the corrosion of steel pipelines in the chemical products industry is also
given, and the possibility of taking measures to prevent such occurrences is discussed.
PB  - SERBIAN SOCIETY OF CORROSION AND MATERIALS PROTECTION (UISKOZAM)
C3  - XXIV YuCorr, Divčibare, Serbia-Proceedings
T1  - The Finite Element Method in the function of corrosion damage assessment of pipelines
EP  - 225
SP  - 216
UR  - https://hdl.handle.net/21.15107/rcub_rims_681
ER  - 

@conference{
author = "Aleksić, Vujadin and Zečević, Bojana and Bulatović, Srđan and Maksimović, Ana and Milović, Ljubica",
year = "2023",
abstract = "Pipelines, with specifics in design, construction, testing and safety requirements must be designed
based on all relevant influences to ensure that they are safe during their working life. Allowable
stresses must be limited by possible errors in working conditions, in order to completely eliminate
the uncertainty arising from the production, the calculation model, the actual working conditions and
the characteristics and behavior of the material. In the paper, on the example of modeling and
calculation of the corrosion-damaged structure of the ammonia (NH3) transfer pipeline, a
methodological approach to the calculation using the Finite Element Method (FEM), is shown, in
accordance with the methods defined by the new and general approach to standardization and
technical harmonization for pressure equipment (Pressure Equipment Directive - PED 97/23 EC).
The paper uses advanced modeling techniques of corroded surfaces, based on FEM, with the aim of
developing a procedure for assessing the residual strength of steel pipelines operating in the
environmental conditions of the chemical products industry. The presentation of possible damages
and consequences caused by the corrosion of steel pipelines in the chemical products industry is also
given, and the possibility of taking measures to prevent such occurrences is discussed.",
publisher = "SERBIAN SOCIETY OF CORROSION AND MATERIALS PROTECTION (UISKOZAM)",
journal = "XXIV YuCorr, Divčibare, Serbia-Proceedings",
title = "The Finite Element Method in the function of corrosion damage assessment of pipelines",
pages = "225-216",
url = "https://hdl.handle.net/21.15107/rcub_rims_681"
}

Aleksić, V., Zečević, B., Bulatović, S., Maksimović, A.,& Milović, L.. (2023). The Finite Element Method in the function of corrosion damage assessment of pipelines. in XXIV YuCorr, Divčibare, Serbia-Proceedings
SERBIAN SOCIETY OF CORROSION AND MATERIALS PROTECTION (UISKOZAM)., 216-225.
https://hdl.handle.net/21.15107/rcub_rims_681

Aleksić V, Zečević B, Bulatović S, Maksimović A, Milović L. The Finite Element Method in the function of corrosion damage assessment of pipelines. in XXIV YuCorr, Divčibare, Serbia-Proceedings. 2023;:216-225.
https://hdl.handle.net/21.15107/rcub_rims_681 .

Aleksić, Vujadin, Zečević, Bojana, Bulatović, Srđan, Maksimović, Ana, Milović, Ljubica, "The Finite Element Method in the function of corrosion damage assessment of pipelines" in XXIV YuCorr, Divčibare, Serbia-Proceedings (2023):216-225,
https://hdl.handle.net/21.15107/rcub_rims_681 .

TY  - CONF
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/678
AB  - In the paper, based on the results of experimental research on the behavior of samples in the form of
round smooth test specimens (STS) made of high strength low alloy steel (HSLA), Nionikral 70 (NN
70), under conditions of low cycle fatigue (LCF), a computational stress analysis was performed
using numerical methods.
Experimental investigations of the behavior of the samples were performed with controlled and fully
reversible deformation ( /2 = const, R = min/ max = 1), according to the ISO 12106:2003 (E)
standard.
For computational analyses, the method of least squares (in the Excel program) and the finite
element method (FEM) (in the SolidWorks program) were used. The behavior of HSLA steel during
low cycle fatigue (LCF) simulation was analyzed in the Cosmos module of the SolidWorks program.
On the basis of the analysis of the results of the stress deformation state and the determination of the
life span through the isolines of the life span and comparison with the results of experimental tests, a
graphic representation is given. Specific load cycles involving the entire round smooth test specimen
ligament for a specific load in a wide range of LCF loads were analyzed.
The analyzes showed the justification of the effort to solve the life assessment of steel subjected to
low cycle fatigue (LCF) numerically. The results of experimental tests and simulation tests also gave
us important data on understanding the LCF behavior of HSLA steel NN 70.
C3  - 16th International Conference on Accomplishments in Mechanical and Industrial Engineering DEMI
T1  - Life assessment using the finite element method of high-strength low-alloy steel samples exposed to low-cycle fatigue
EP  - 499
SP  - 490
UR  - https://hdl.handle.net/21.15107/rcub_rims_678
ER  - 

@conference{
author = "Aleksić, Vujadin and Bulatović, Srđan and Zečević, Bojana and Maksimović, Ana and Milović, Ljubica",
year = "2023",
abstract = "In the paper, based on the results of experimental research on the behavior of samples in the form of
round smooth test specimens (STS) made of high strength low alloy steel (HSLA), Nionikral 70 (NN
70), under conditions of low cycle fatigue (LCF), a computational stress analysis was performed
using numerical methods.
Experimental investigations of the behavior of the samples were performed with controlled and fully
reversible deformation ( /2 = const, R = min/ max = 1), according to the ISO 12106:2003 (E)
standard.
For computational analyses, the method of least squares (in the Excel program) and the finite
element method (FEM) (in the SolidWorks program) were used. The behavior of HSLA steel during
low cycle fatigue (LCF) simulation was analyzed in the Cosmos module of the SolidWorks program.
On the basis of the analysis of the results of the stress deformation state and the determination of the
life span through the isolines of the life span and comparison with the results of experimental tests, a
graphic representation is given. Specific load cycles involving the entire round smooth test specimen
ligament for a specific load in a wide range of LCF loads were analyzed.
The analyzes showed the justification of the effort to solve the life assessment of steel subjected to
low cycle fatigue (LCF) numerically. The results of experimental tests and simulation tests also gave
us important data on understanding the LCF behavior of HSLA steel NN 70.",
journal = "16th International Conference on Accomplishments in Mechanical and Industrial Engineering DEMI",
title = "Life assessment using the finite element method of high-strength low-alloy steel samples exposed to low-cycle fatigue",
pages = "499-490",
url = "https://hdl.handle.net/21.15107/rcub_rims_678"
}

Aleksić, V., Bulatović, S., Zečević, B., Maksimović, A.,& Milović, L.. (2023). Life assessment using the finite element method of high-strength low-alloy steel samples exposed to low-cycle fatigue. in 16th International Conference on Accomplishments in Mechanical and Industrial Engineering DEMI, 490-499.
https://hdl.handle.net/21.15107/rcub_rims_678

Aleksić V, Bulatović S, Zečević B, Maksimović A, Milović L. Life assessment using the finite element method of high-strength low-alloy steel samples exposed to low-cycle fatigue. in 16th International Conference on Accomplishments in Mechanical and Industrial Engineering DEMI. 2023;:490-499.
https://hdl.handle.net/21.15107/rcub_rims_678 .

Aleksić, Vujadin, Bulatović, Srđan, Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, "Life assessment using the finite element method of high-strength low-alloy steel samples exposed to low-cycle fatigue" in 16th International Conference on Accomplishments in Mechanical and Industrial Engineering DEMI (2023):490-499,
https://hdl.handle.net/21.15107/rcub_rims_678 .

TY  - JOUR
AU  - Maksimović, Ana
AU  - Petrovski, Blagoj
AU  - Milović, Ljubica
AU  - Zečević, Bojana
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
AU  - Bekrić, Dragoljub
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/660
AB  - Most serious weldment failures have catastrophic consequences in terms of damage to other equipment, loss of production, and risks to worker health and safety. For the above reasons, there is a tendency to find the line between safety and disaster, and this requires a guarantee of the integrity of the welded structure even if a crack is present. The structural and mechanical heterogeneity of a welded joint affects its resistance to cracking in both the elastic and plastic regions. Therefore, it is important to define the test method and the position of the fatigue crack. The behavior of an elasto-plastic material, during stable crack growth can be described by the J-Δa diagram. As the crack propagates, a point on the curve is defined, which represents the critical value of the J-integral. The aim of this experiment is to determine JIC value and the procedure is reflected in the determination of the R-curve, i.e., the J‒Δa curve, which consists of the value of the J-integral for uniform crack increments Δa. In this paper, precracked SEN(B) specimens with the fatigue crack positioned in the weld metal (WM) were tested according to standard ASTM E1820 at room temperature (RT), -20 °C and -30 °C.
PB  - Elsevier B.V.
T2  - Procedia Structural Integrity
T1  - Experimental Determination of JIc for a HSLA Steel Welded Joint
EP  - 194
SP  - 190
VL  - 48
DO  - 10.1016/j.prostr.2023.07.147
ER  - 

@article{
author = "Maksimović, Ana and Petrovski, Blagoj and Milović, Ljubica and Zečević, Bojana and Aleksić, Vujadin and Bulatović, Srđan and Bekrić, Dragoljub",
year = "2023",
abstract = "Most serious weldment failures have catastrophic consequences in terms of damage to other equipment, loss of production, and risks to worker health and safety. For the above reasons, there is a tendency to find the line between safety and disaster, and this requires a guarantee of the integrity of the welded structure even if a crack is present. The structural and mechanical heterogeneity of a welded joint affects its resistance to cracking in both the elastic and plastic regions. Therefore, it is important to define the test method and the position of the fatigue crack. The behavior of an elasto-plastic material, during stable crack growth can be described by the J-Δa diagram. As the crack propagates, a point on the curve is defined, which represents the critical value of the J-integral. The aim of this experiment is to determine JIC value and the procedure is reflected in the determination of the R-curve, i.e., the J‒Δa curve, which consists of the value of the J-integral for uniform crack increments Δa. In this paper, precracked SEN(B) specimens with the fatigue crack positioned in the weld metal (WM) were tested according to standard ASTM E1820 at room temperature (RT), -20 °C and -30 °C.",
publisher = "Elsevier B.V.",
journal = "Procedia Structural Integrity",
title = "Experimental Determination of JIc for a HSLA Steel Welded Joint",
pages = "194-190",
volume = "48",
doi = "10.1016/j.prostr.2023.07.147"
}

Maksimović, A., Petrovski, B., Milović, L., Zečević, B., Aleksić, V., Bulatović, S.,& Bekrić, D.. (2023). Experimental Determination of JIc for a HSLA Steel Welded Joint. in Procedia Structural Integrity
Elsevier B.V.., 48, 190-194.
https://doi.org/10.1016/j.prostr.2023.07.147

Maksimović A, Petrovski B, Milović L, Zečević B, Aleksić V, Bulatović S, Bekrić D. Experimental Determination of JIc for a HSLA Steel Welded Joint. in Procedia Structural Integrity. 2023;48:190-194.
doi:10.1016/j.prostr.2023.07.147 .

Maksimović, Ana, Petrovski, Blagoj, Milović, Ljubica, Zečević, Bojana, Aleksić, Vujadin, Bulatović, Srđan, Bekrić, Dragoljub, "Experimental Determination of JIc for a HSLA Steel Welded Joint" in Procedia Structural Integrity, 48 (2023):190-194,
https://doi.org/10.1016/j.prostr.2023.07.147 . .

TY  - JOUR
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/656
AB  - Fracture mechanics, as a scientific discipline dealing with the study of cracks in welded structures, has defined parameters and introduced new test methods in order to better determine the tendency to crack growth, critical conditions for rapid fracture development, material resistance to rapid crack propagation and better definition of other parameters for assessing the behaviour of the material and the safety of the structure in the presence of cracks. In this paper, the focus is on determination of the parameter of elastic-plastic mechanics of J-integral, more precisely, on examination of the critical value of J-integral (JIc) of the welded joint of HSLA steel. The position of the tip of the fatigue crack and the properties of the region where fracture propagation occurs are main indicators of influence of the heterogeneity of the NN-70 welded structure and mechanical properties. Resistance to cracking in the welded joint shows that the heterogeneity has a major impact on the resistance to crack initiation and propagation, in elastic as well as in the plastic region.
PB  - Strojarski Facultet
T2  - Tehnicki Vjesnik
T1  - Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint
DO  - 10.17559/TV-20220419093052
ER  - 

@article{
author = "Bulatović, Srđan and Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana",
year = "2023",
abstract = "Fracture mechanics, as a scientific discipline dealing with the study of cracks in welded structures, has defined parameters and introduced new test methods in order to better determine the tendency to crack growth, critical conditions for rapid fracture development, material resistance to rapid crack propagation and better definition of other parameters for assessing the behaviour of the material and the safety of the structure in the presence of cracks. In this paper, the focus is on determination of the parameter of elastic-plastic mechanics of J-integral, more precisely, on examination of the critical value of J-integral (JIc) of the welded joint of HSLA steel. The position of the tip of the fatigue crack and the properties of the region where fracture propagation occurs are main indicators of influence of the heterogeneity of the NN-70 welded structure and mechanical properties. Resistance to cracking in the welded joint shows that the heterogeneity has a major impact on the resistance to crack initiation and propagation, in elastic as well as in the plastic region.",
publisher = "Strojarski Facultet",
journal = "Tehnicki Vjesnik",
title = "Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint",
doi = "10.17559/TV-20220419093052"
}

Bulatović, S., Aleksić, V., Milović, L.,& Zečević, B.. (2023). Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint. in Tehnicki Vjesnik
Strojarski Facultet..
https://doi.org/10.17559/TV-20220419093052

Bulatović S, Aleksić V, Milović L, Zečević B. Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint. in Tehnicki Vjesnik. 2023;.
doi:10.17559/TV-20220419093052 .

Bulatović, Srđan, Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, "Experimental Determination of the Critical Value of the J-Integral that Refers to the HSLA Steel Welded Joint" in Tehnicki Vjesnik (2023),
https://doi.org/10.17559/TV-20220419093052 . .

TY  - JOUR
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/654
AB  - The influence of temperature on the fatigue crack growth parameter, was analyzed by testing chromium-molybdenum steel of the new generation additionally alloyed with vanadium, designed for high temperatures application. The paper presents a comparison of the fatigue threshold value ΔKth and the fatigue crack growth rate da/dN of the specimens taken from the pipe made of virgin steel, tested at room (RT) and operating (HT) temperatures of 540 °C. The influence of the location of the notch and crack initiation, as well as the test temperature, have a decisive effect on the fatigue threshold values ΔKth of the chromium-molybdenum alloyed steel of the new generation additionally alloyed with vanadium for high temperatures application.
PB  - Elsevier B.V.
T2  - Procedia Structural Integrity
T1  - Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures
EP  - 301
SP  - 296
VL  - 48
DO  - 10.1016/j.prostr.2023.07.129
ER  - 

@article{
author = "Zečević, Bojana and Maksimović, Ana and Milović, Ljubica and Aleksić, Vujadin and Bulatović, Srđan",
year = "2023",
abstract = "The influence of temperature on the fatigue crack growth parameter, was analyzed by testing chromium-molybdenum steel of the new generation additionally alloyed with vanadium, designed for high temperatures application. The paper presents a comparison of the fatigue threshold value ΔKth and the fatigue crack growth rate da/dN of the specimens taken from the pipe made of virgin steel, tested at room (RT) and operating (HT) temperatures of 540 °C. The influence of the location of the notch and crack initiation, as well as the test temperature, have a decisive effect on the fatigue threshold values ΔKth of the chromium-molybdenum alloyed steel of the new generation additionally alloyed with vanadium for high temperatures application.",
publisher = "Elsevier B.V.",
journal = "Procedia Structural Integrity",
title = "Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures",
pages = "301-296",
volume = "48",
doi = "10.1016/j.prostr.2023.07.129"
}

Zečević, B., Maksimović, A., Milović, L., Aleksić, V.,& Bulatović, S.. (2023). Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures. in Procedia Structural Integrity
Elsevier B.V.., 48, 296-301.
https://doi.org/10.1016/j.prostr.2023.07.129

Zečević B, Maksimović A, Milović L, Aleksić V, Bulatović S. Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures. in Procedia Structural Integrity. 2023;48:296-301.
doi:10.1016/j.prostr.2023.07.129 .

Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, Aleksić, Vujadin, Bulatović, Srđan, "Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures" in Procedia Structural Integrity, 48 (2023):296-301,
https://doi.org/10.1016/j.prostr.2023.07.129 . .

TY  - CONF
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/699
AB  - Continuous exploitation in very harsh environmental conditions can lead to relatively frequent damages of steam line system. High place among the causes of these damages takes inadequate exploitation and maintenance. This paper describes damages and failures of steam line and provides an overview of NDT testing in order to determine the cause of steam lines failure in thermal power plants. This method may be applied to similar structures and its application in preventive maintenance would help extend the life of steam pipes. The results presented in this paper and conducted research projects allow us to analyze the behavior of supporting elements of steam line in order to determine changes in mechanical properties of materials.
C3  - Međunarodno savetovanje Energetika, Zlatibor
T1  - Damages That Occur at Vital Components of the Thermal Power Plant System Detected by NDT Testing
UR  - https://hdl.handle.net/21.15107/rcub_rims_699
ER  - 

@conference{
author = "Bulatović, Srđan and Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana",
year = "2022",
abstract = "Continuous exploitation in very harsh environmental conditions can lead to relatively frequent damages of steam line system. High place among the causes of these damages takes inadequate exploitation and maintenance. This paper describes damages and failures of steam line and provides an overview of NDT testing in order to determine the cause of steam lines failure in thermal power plants. This method may be applied to similar structures and its application in preventive maintenance would help extend the life of steam pipes. The results presented in this paper and conducted research projects allow us to analyze the behavior of supporting elements of steam line in order to determine changes in mechanical properties of materials.",
journal = "Međunarodno savetovanje Energetika, Zlatibor",
title = "Damages That Occur at Vital Components of the Thermal Power Plant System Detected by NDT Testing",
url = "https://hdl.handle.net/21.15107/rcub_rims_699"
}

Bulatović, S., Aleksić, V., Milović, L.,& Zečević, B.. (2022). Damages That Occur at Vital Components of the Thermal Power Plant System Detected by NDT Testing. in Međunarodno savetovanje Energetika, Zlatibor.
https://hdl.handle.net/21.15107/rcub_rims_699

Bulatović S, Aleksić V, Milović L, Zečević B. Damages That Occur at Vital Components of the Thermal Power Plant System Detected by NDT Testing. in Međunarodno savetovanje Energetika, Zlatibor. 2022;.
https://hdl.handle.net/21.15107/rcub_rims_699 .

Bulatović, Srđan, Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, "Damages That Occur at Vital Components of the Thermal Power Plant System Detected by NDT Testing" in Međunarodno savetovanje Energetika, Zlatibor (2022),
https://hdl.handle.net/21.15107/rcub_rims_699 .

TY  - CONF
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/702
AB  - The idea of this research was to collect data on the effect of operating temperature on the
impact toughness properties of low-carbon microalloyed steel intended for elevated
temperatures application. The aim of this investigation was to determine the effects of
temperature as well as the effects of specimen orientation with regards to the rolling
direction, on the impact toughness and the relation between its components. Charpy
specimens were made from virgin material and were tested at room and operating
temperature of 540 . Specimens were cut from the pipe in two directions, along the rollind
direction (L-) and transverse to the rolling direction (T-). The tests were performed on an
instrumented Sharpy pendulum 150/300 J, results show the total impact energy values, Etot,
crack initiation energy, Ei, and crack propagation energy, Ep. The macroscopic and microscopic specimens fracture surfaces are shown. Obtainted results of impact tests energy
values, correspond to the SEM micrographs of fractured surfaces.
C3  - Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts
T1  - Characterization of fracture behavior of a low carbon microalloyed steel for elevated temperature application
SP  - 27
UR  - https://hdl.handle.net/21.15107/rcub_rims_702
ER  - 

@conference{
author = "Zečević, Bojana and Maksimović, Ana and Milović, Ljubica and Aleksić, Vujadin and Bulatović, Srđan",
year = "2022",
abstract = "The idea of this research was to collect data on the effect of operating temperature on the
impact toughness properties of low-carbon microalloyed steel intended for elevated
temperatures application. The aim of this investigation was to determine the effects of
temperature as well as the effects of specimen orientation with regards to the rolling
direction, on the impact toughness and the relation between its components. Charpy
specimens were made from virgin material and were tested at room and operating
temperature of 540 . Specimens were cut from the pipe in two directions, along the rollind
direction (L-) and transverse to the rolling direction (T-). The tests were performed on an
instrumented Sharpy pendulum 150/300 J, results show the total impact energy values, Etot,
crack initiation energy, Ei, and crack propagation energy, Ep. The macroscopic and microscopic specimens fracture surfaces are shown. Obtainted results of impact tests energy
values, correspond to the SEM micrographs of fractured surfaces.",
journal = "Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts",
title = "Characterization of fracture behavior of a low carbon microalloyed steel for elevated temperature application",
pages = "27",
url = "https://hdl.handle.net/21.15107/rcub_rims_702"
}

Zečević, B., Maksimović, A., Milović, L., Aleksić, V.,& Bulatović, S.. (2022). Characterization of fracture behavior of a low carbon microalloyed steel for elevated temperature application. in Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts, 27.
https://hdl.handle.net/21.15107/rcub_rims_702

Zečević B, Maksimović A, Milović L, Aleksić V, Bulatović S. Characterization of fracture behavior of a low carbon microalloyed steel for elevated temperature application. in Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts. 2022;:27.
https://hdl.handle.net/21.15107/rcub_rims_702 .

Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, Aleksić, Vujadin, Bulatović, Srđan, "Characterization of fracture behavior of a low carbon microalloyed steel for elevated temperature application" in Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts (2022):27,
https://hdl.handle.net/21.15107/rcub_rims_702 .

TY  - CONF
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Zečević, Bojana
AU  - Đorđević, Branislav
AU  - Aleksić, Vujadin
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/701
AB  - This paper is to study the effect of alloying elements on mechanical properties of highstrength
low-alloy steel, NIOMOL 490K. This steel grade belongs to the class of
molybdenum microalloyed steels, in which microalloying with molybdenum serves to
increases the heat resistance of steel along with the effect of increasing the influences of
other alloying elements. This steel grade is designed for welded pressure vessels fabrication
and is primarily applied for dynamic loading conditions at low operating temperatures. Highstrength
low-alloy steels used nowadays are usually obtained by means of suitable chemical
composition and thermo-mechanical treatment. In present paper, the tensile and hardness
tests were used to determine the effect of mechanical properties of NIOMOL 490K steel.
C3  - Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts
T1  - The effects of alloying elements on mechanical properties of NIOMOL 490K steel
SP  - 26
UR  - https://hdl.handle.net/21.15107/rcub_rims_701
ER  - 

@conference{
author = "Maksimović, Ana and Milović, Ljubica and Zečević, Bojana and Đorđević, Branislav and Aleksić, Vujadin",
year = "2022",
abstract = "This paper is to study the effect of alloying elements on mechanical properties of highstrength
low-alloy steel, NIOMOL 490K. This steel grade belongs to the class of
molybdenum microalloyed steels, in which microalloying with molybdenum serves to
increases the heat resistance of steel along with the effect of increasing the influences of
other alloying elements. This steel grade is designed for welded pressure vessels fabrication
and is primarily applied for dynamic loading conditions at low operating temperatures. Highstrength
low-alloy steels used nowadays are usually obtained by means of suitable chemical
composition and thermo-mechanical treatment. In present paper, the tensile and hardness
tests were used to determine the effect of mechanical properties of NIOMOL 490K steel.",
journal = "Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts",
title = "The effects of alloying elements on mechanical properties of NIOMOL 490K steel",
pages = "26",
url = "https://hdl.handle.net/21.15107/rcub_rims_701"
}

Maksimović, A., Milović, L., Zečević, B., Đorđević, B.,& Aleksić, V.. (2022). The effects of alloying elements on mechanical properties of NIOMOL 490K steel. in Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts, 26.
https://hdl.handle.net/21.15107/rcub_rims_701

Maksimović A, Milović L, Zečević B, Đorđević B, Aleksić V. The effects of alloying elements on mechanical properties of NIOMOL 490K steel. in Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts. 2022;:26.
https://hdl.handle.net/21.15107/rcub_rims_701 .

Maksimović, Ana, Milović, Ljubica, Zečević, Bojana, Đorđević, Branislav, Aleksić, Vujadin, "The effects of alloying elements on mechanical properties of NIOMOL 490K steel" in Twentieth Young Researchers’ Conference - Materials Science and Engineering: Programme and the Book of Abstracts (2022):26,
https://hdl.handle.net/21.15107/rcub_rims_701 .

TY  - CONF
AU  - Aleksić, Vujadin
AU  - Zečević, Bojana
AU  - Bulatović, Srđan
AU  - Maksimović, Ana
AU  - Milović, Ljubica
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/700
AB  - The paper gives an illustrative presentation of damage to the material of bridge structures
due to failure to maintain the system for drainage of bridges. Damage is caused by mechanical
erosion and abrasion or by chemical means, corrosion or a combination of the above. The cause of
the damage is related to the retention of salted water on the road and other surfaces of the bridge
structure, as well as wetting of the side and ceiling surfaces by flooding due to the non-functionality
of the water drainage system from the bridge. The possibility of taking measures to prevent such
phenomena and reduce them to a minimum is also considered.
C3  - XXIII YuCorr, Divčibare, Serbia
T1  - The role of drainage systems in the prevention of material degradation of bridge structures
EP  - 185
SP  - 176
UR  - https://hdl.handle.net/21.15107/rcub_rims_700
ER  - 

@conference{
author = "Aleksić, Vujadin and Zečević, Bojana and Bulatović, Srđan and Maksimović, Ana and Milović, Ljubica",
year = "2022",
abstract = "The paper gives an illustrative presentation of damage to the material of bridge structures
due to failure to maintain the system for drainage of bridges. Damage is caused by mechanical
erosion and abrasion or by chemical means, corrosion or a combination of the above. The cause of
the damage is related to the retention of salted water on the road and other surfaces of the bridge
structure, as well as wetting of the side and ceiling surfaces by flooding due to the non-functionality
of the water drainage system from the bridge. The possibility of taking measures to prevent such
phenomena and reduce them to a minimum is also considered.",
journal = "XXIII YuCorr, Divčibare, Serbia",
title = "The role of drainage systems in the prevention of material degradation of bridge structures",
pages = "185-176",
url = "https://hdl.handle.net/21.15107/rcub_rims_700"
}

Aleksić, V., Zečević, B., Bulatović, S., Maksimović, A.,& Milović, L.. (2022). The role of drainage systems in the prevention of material degradation of bridge structures. in XXIII YuCorr, Divčibare, Serbia, 176-185.
https://hdl.handle.net/21.15107/rcub_rims_700

Aleksić V, Zečević B, Bulatović S, Maksimović A, Milović L. The role of drainage systems in the prevention of material degradation of bridge structures. in XXIII YuCorr, Divčibare, Serbia. 2022;:176-185.
https://hdl.handle.net/21.15107/rcub_rims_700 .

Aleksić, Vujadin, Zečević, Bojana, Bulatović, Srđan, Maksimović, Ana, Milović, Ljubica, "The role of drainage systems in the prevention of material degradation of bridge structures" in XXIII YuCorr, Divčibare, Serbia (2022):176-185,
https://hdl.handle.net/21.15107/rcub_rims_700 .

TY  - JOUR
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/661
AB  - Welded joint is a critical region of a welded structure and fracture mechanics analysis is inevitable
in the structural integrity assessment of all welded structures. This paper shows the determining of
parameters of the fatigue crack for constituents of welded joints produced of high strength low
alloyed steel. The applied methodology refers to the Paris relation where the link was established
between the variable load quantity or the corresponding stress intensity factor range and crack
growth per cycle. Results have shown that the position of the notch and crack initiation affect the
values of the stress intensity range of fatigue threshold ΔKth and parameters in the Paris’ equation.
This is mostly expressed when determining growth parameters of the fatigue crack in heat affected
zone of HSLA steel, where different changes of growth speed of the fatigue crack clearly express
differences in structure of the crack pass
T2  - Advanced Technologies & Materials
T1  - Determining of the Fatigue Crack Growth Rate of HSLA Steel at Room Temperature
IS  - 1
VL  - 47
DO  - 10.24867/ATM-2022-1-001
ER  - 

@article{
author = "Bulatović, Srđan and Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana",
year = "2022",
abstract = "Welded joint is a critical region of a welded structure and fracture mechanics analysis is inevitable
in the structural integrity assessment of all welded structures. This paper shows the determining of
parameters of the fatigue crack for constituents of welded joints produced of high strength low
alloyed steel. The applied methodology refers to the Paris relation where the link was established
between the variable load quantity or the corresponding stress intensity factor range and crack
growth per cycle. Results have shown that the position of the notch and crack initiation affect the
values of the stress intensity range of fatigue threshold ΔKth and parameters in the Paris’ equation.
This is mostly expressed when determining growth parameters of the fatigue crack in heat affected
zone of HSLA steel, where different changes of growth speed of the fatigue crack clearly express
differences in structure of the crack pass",
journal = "Advanced Technologies & Materials",
title = "Determining of the Fatigue Crack Growth Rate of HSLA Steel at Room Temperature",
number = "1",
volume = "47",
doi = "10.24867/ATM-2022-1-001"
}

Bulatović, S., Aleksić, V., Milović, L.,& Zečević, B.. (2022). Determining of the Fatigue Crack Growth Rate of HSLA Steel at Room Temperature. in Advanced Technologies & Materials, 47(1).
https://doi.org/10.24867/ATM-2022-1-001

Bulatović S, Aleksić V, Milović L, Zečević B. Determining of the Fatigue Crack Growth Rate of HSLA Steel at Room Temperature. in Advanced Technologies & Materials. 2022;47(1).
doi:10.24867/ATM-2022-1-001 .

Bulatović, Srđan, Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, "Determining of the Fatigue Crack Growth Rate of HSLA Steel at Room Temperature" in Advanced Technologies & Materials, 47, no. 1 (2022),
https://doi.org/10.24867/ATM-2022-1-001 . .

TY  - CONF
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Aleksić, Vujadin
AU  - Grbović, Aleksandar
AU  - Bulatović, Srđan
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/624
AB  - Steel grade 14MoV6 3 is used for manufacturing of boilers and steam pipelines designed for steam temperatures up to 560°C. This paper presents the numerical simulation of a CT-specimen, using the finite element method. The analysis was performed using Ansys Workbench R21, and represents the initial stage of extensive research involving the behaviour of 14MoV6 3 steel. The goal was to simulate the real experimental conditions, including boundary conditions and loads, which were defined in accordance with relevant standards, and to obtain representative results. The temperature dependent mechanical properties needed for the simulation of plastic behaviour of such specimens under tensile loads were obtained from the experimental data and the literature.
PB  - Elsevier B.V.
C3  - 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
T1  - Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior
VL  - 42
DO  - 10.1016/j.prostr.2022.12.189
ER  - 

@conference{
author = "Zečević, Bojana and Maksimović, Ana and Milović, Ljubica and Aleksić, Vujadin and Grbović, Aleksandar and Bulatović, Srđan",
year = "2022",
abstract = "Steel grade 14MoV6 3 is used for manufacturing of boilers and steam pipelines designed for steam temperatures up to 560°C. This paper presents the numerical simulation of a CT-specimen, using the finite element method. The analysis was performed using Ansys Workbench R21, and represents the initial stage of extensive research involving the behaviour of 14MoV6 3 steel. The goal was to simulate the real experimental conditions, including boundary conditions and loads, which were defined in accordance with relevant standards, and to obtain representative results. The temperature dependent mechanical properties needed for the simulation of plastic behaviour of such specimens under tensile loads were obtained from the experimental data and the literature.",
publisher = "Elsevier B.V.",
journal = "23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity",
title = "Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior",
volume = "42",
doi = "10.1016/j.prostr.2022.12.189"
}

Zečević, B., Maksimović, A., Milović, L., Aleksić, V., Grbović, A.,& Bulatović, S.. (2022). Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity
Elsevier B.V.., 42.
https://doi.org/10.1016/j.prostr.2022.12.189

Zečević B, Maksimović A, Milović L, Aleksić V, Grbović A, Bulatović S. Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior. in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity. 2022;42.
doi:10.1016/j.prostr.2022.12.189 .

Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, Aleksić, Vujadin, Grbović, Aleksandar, Bulatović, Srđan, "Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior" in 23rd European Conference on Fracture, ECF 2022, Procedia Structural Integrity, 42 (2022),
https://doi.org/10.1016/j.prostr.2022.12.189 . .

TY  - CONF
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Bulatović, Srđan
AU  - Zečević, Bojana
AU  - Maksimović, Ana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/416
AB  - The behavior of steel in low-cycle fatigue (LCF) is tested experimentally, in accordance with ISO 12106:2017 (E) and/or ASTM E 606-04. For this purpose, smooth specimens which are exposed to low-cycle fatigue at several levels of regulated strains and/or loads at room, elevated or reduced temperatures are used. Stress–strain response at LCF has the shape of an ideal hysteresis loop. The strain range Δε corresponds to overall loop width, while the stress range Δσ corresponds to its overall height. The paper presents a method for determining the intersection of the idealized hysteresis loop and the positive part of the strain axis in order to determine the values of elastic, Δεe/2, and plastic, Δεp/2, components of the strain amplitude to characterize the behavior of steel under low cyclic fatigue. The values of elastic and plastic components of the strain amplitude are needed to determine the characteristic curves of low-cycle fatigue, which describe the behavior of steel under the loading of low-cycle fatigue.
PB  - Springer Science and Business Media B.V.
C3  - Mechanisms and Machine Science
T1  - Determination of LCF Plastic and Elastic Strain Components of Steel
EP  - 349
SP  - 341
VL  - 109
DO  - 10.1007/978-3-030-88465-9_32
ER  - 

@conference{
author = "Aleksić, Vujadin and Milović, Ljubica and Bulatović, Srđan and Zečević, Bojana and Maksimović, Ana",
year = "2022",
abstract = "The behavior of steel in low-cycle fatigue (LCF) is tested experimentally, in accordance with ISO 12106:2017 (E) and/or ASTM E 606-04. For this purpose, smooth specimens which are exposed to low-cycle fatigue at several levels of regulated strains and/or loads at room, elevated or reduced temperatures are used. Stress–strain response at LCF has the shape of an ideal hysteresis loop. The strain range Δε corresponds to overall loop width, while the stress range Δσ corresponds to its overall height. The paper presents a method for determining the intersection of the idealized hysteresis loop and the positive part of the strain axis in order to determine the values of elastic, Δεe/2, and plastic, Δεp/2, components of the strain amplitude to characterize the behavior of steel under low cyclic fatigue. The values of elastic and plastic components of the strain amplitude are needed to determine the characteristic curves of low-cycle fatigue, which describe the behavior of steel under the loading of low-cycle fatigue.",
publisher = "Springer Science and Business Media B.V.",
journal = "Mechanisms and Machine Science",
title = "Determination of LCF Plastic and Elastic Strain Components of Steel",
pages = "349-341",
volume = "109",
doi = "10.1007/978-3-030-88465-9_32"
}

Aleksić, V., Milović, L., Bulatović, S., Zečević, B.,& Maksimović, A.. (2022). Determination of LCF Plastic and Elastic Strain Components of Steel. in Mechanisms and Machine Science
Springer Science and Business Media B.V.., 109, 341-349.
https://doi.org/10.1007/978-3-030-88465-9_32

Aleksić V, Milović L, Bulatović S, Zečević B, Maksimović A. Determination of LCF Plastic and Elastic Strain Components of Steel. in Mechanisms and Machine Science. 2022;109:341-349.
doi:10.1007/978-3-030-88465-9_32 .

Aleksić, Vujadin, Milović, Ljubica, Bulatović, Srđan, Zečević, Bojana, Maksimović, Ana, "Determination of LCF Plastic and Elastic Strain Components of Steel" in Mechanisms and Machine Science, 109 (2022):341-349,
https://doi.org/10.1007/978-3-030-88465-9_32 . .

TY  - JOUR
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/415
AB  - The most important characteristics for service safety of welded joints are those describing crack initiation and growth caused by variable loading. Crack initiation and growth caused by variable loading is the subject of numerous investigations. This paper shows the determination of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel. The crack growth law of Paris establishes the relation between the applied variable load quantity or the corresponding stress intensity factor range and crack growth per cycle. Results have shown that the position of the notch and crack initiation affect the values of the stress intensity range of fatigue threshold Delta Kth and parameters in the Paris' equation.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Application of Paris' Law Under Variable Loading
EP  - 78
IS  - 1
SP  - 72
VL  - 50
DO  - 10.5937/fme2201072B
ER  - 

@article{
author = "Bulatović, Srđan and Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana",
year = "2022",
abstract = "The most important characteristics for service safety of welded joints are those describing crack initiation and growth caused by variable loading. Crack initiation and growth caused by variable loading is the subject of numerous investigations. This paper shows the determination of parameters of the fatigue crack for constituents of welded joints produced of high strength low alloyed steel. The crack growth law of Paris establishes the relation between the applied variable load quantity or the corresponding stress intensity factor range and crack growth per cycle. Results have shown that the position of the notch and crack initiation affect the values of the stress intensity range of fatigue threshold Delta Kth and parameters in the Paris' equation.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Application of Paris' Law Under Variable Loading",
pages = "78-72",
number = "1",
volume = "50",
doi = "10.5937/fme2201072B"
}

Bulatović, S., Aleksić, V., Milović, L.,& Zečević, B.. (2022). Application of Paris' Law Under Variable Loading. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 50(1), 72-78.
https://doi.org/10.5937/fme2201072B

Bulatović S, Aleksić V, Milović L, Zečević B. Application of Paris' Law Under Variable Loading. in FME Transactions. 2022;50(1):72-78.
doi:10.5937/fme2201072B .

Bulatović, Srđan, Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, "Application of Paris' Law Under Variable Loading" in FME Transactions, 50, no. 1 (2022):72-78,
https://doi.org/10.5937/fme2201072B . .

TY  - JOUR
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/662
AB  - In many production processes, as well as in the exploitation of machine components and structures, materials are exposed to
impact loads. In structures made of welded joints of high strength low-alloy steels with their constituents (parent metal, weld
metal and heat-affected-zone), the toughness test determines the tendency of steel to brittle fracture, respectively the tendency
to increase brittleness during exploitation.
The strain rate is high and the material manifests much more brittle behavior than is shown by tensile testing. Toughness as
a mechanical property is an important factor that is defined as the energy that needs to be spent in order to achieve fracture.
Parameters obtained by testing the properties of plasticity are the basis for the design of structures in order to achieve
strengths under applied load.
The test results of high strength low-alloy steel toughness assessment at different test temperatures show that temperature
significantly affects the impact toughness of steels and their alloys. At higher temperatures the impact energy on fracture is
high (the material shows the properties of plasticity) while at lower temperatures the impact energy is small (the material is
brittle).
T2  - Advanced Technologies & Materials
T1  - High strength low-alloy steels impact toughness assessment at different test temperatures
EP  - 46
IS  - 2
SP  - 43
VL  - 46
DO  - 10.24867/ATM-2021-2-007
ER  - 

@article{
author = "Bulatović, Srđan and Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana",
year = "2021",
abstract = "In many production processes, as well as in the exploitation of machine components and structures, materials are exposed to
impact loads. In structures made of welded joints of high strength low-alloy steels with their constituents (parent metal, weld
metal and heat-affected-zone), the toughness test determines the tendency of steel to brittle fracture, respectively the tendency
to increase brittleness during exploitation.
The strain rate is high and the material manifests much more brittle behavior than is shown by tensile testing. Toughness as
a mechanical property is an important factor that is defined as the energy that needs to be spent in order to achieve fracture.
Parameters obtained by testing the properties of plasticity are the basis for the design of structures in order to achieve
strengths under applied load.
The test results of high strength low-alloy steel toughness assessment at different test temperatures show that temperature
significantly affects the impact toughness of steels and their alloys. At higher temperatures the impact energy on fracture is
high (the material shows the properties of plasticity) while at lower temperatures the impact energy is small (the material is
brittle).",
journal = "Advanced Technologies & Materials",
title = "High strength low-alloy steels impact toughness assessment at different test temperatures",
pages = "46-43",
number = "2",
volume = "46",
doi = "10.24867/ATM-2021-2-007"
}

Bulatović, S., Aleksić, V., Milović, L.,& Zečević, B.. (2021). High strength low-alloy steels impact toughness assessment at different test temperatures. in Advanced Technologies & Materials, 46(2), 43-46.
https://doi.org/10.24867/ATM-2021-2-007

Bulatović S, Aleksić V, Milović L, Zečević B. High strength low-alloy steels impact toughness assessment at different test temperatures. in Advanced Technologies & Materials. 2021;46(2):43-46.
doi:10.24867/ATM-2021-2-007 .

Bulatović, Srđan, Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, "High strength low-alloy steels impact toughness assessment at different test temperatures" in Advanced Technologies & Materials, 46, no. 2 (2021):43-46,
https://doi.org/10.24867/ATM-2021-2-007 . .

TY  - JOUR
AU  - Aleksić, Vujadin
AU  - Dojčinović, Marina
AU  - Milović, Ljubica
AU  - Zečević, Bojana
AU  - Maksimović, Ana
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/405
AB  - Polomljene epruvete za ispitivanje niskocikličnim zamorom čelika Nionikral 70 (NN-70) osnovnog materijala (OM) i simulirane zone pod uticajem toplote (SZUT) poslužile su NAM za izradu uzoraka za ispitivanje otpornosti na kavitaciju. Za ispitivanje u laboratorijskim uslovima primenjena je ultrazvučna vibraciona metoda kavitacije (metoda stacionarnog uzorka). Uslovi i procedura ispitivanja, priprema uzoraka kao i interpretacija rezultata definisani su standardom ASTM G32. Površine uzoraka čelika NN-70 OM i SZUT bile su izložene dejstvu kavitacije i praćenju oštećenja kroz određeno vreme. Merenje gubitka mase uzoraka na analitičkoj vagi posle određenog vremena omogućilo NAM je određivanje kavitacione brzine kao mere procene otpornosti materijala na dejstvo kavitacije. Za praćenje varijacija u morfologiji površine s promenom vremena ispitivanja primenjena je skenirajuća elektronska mikroskopija (SEM). Na osnovu rezultata ispitivanja otpornosti na kavitaciju u radu su analizirane morfologije oštećenja površina za različita vremena izlaganja dejstvu kavitacije uzoraka OM i SZUT čelika NN-70 kao i mehanizmi koji su doveli do oštećenja površina uzoraka.
AB  - Broken test tubes for low-cycle fatigue testing of Nionicral 70 (NN-70) parent material (PM) steel and simulated heat-affected zones (SHAZ) were used to produce samples for cavitation resistance testing. Ultrasonic vibrational cavitation method (stationary sample method) was applied for testing in laboratory conditions. The test conditions and procedure, sample preparation and interpretation of results are defined by ASTM G32. The surfaces of the NN-70 PM and SHAZ steel samples were exposed to cavitation and damage monitoring over time. Measuring the weight loss of samples on the analytical balance after a certain time allowed us to determine the cavitation velocity as a measure of the material's resistance to the effect of cavitation. Scanning electron microscopy (SEM) was applied to monitor variations in surface morphology with changing test time. On the basis of the results of the cavitation resistance test, the morphologies of the surface damage for different exposure times of the cavitation of PM and SHAZ steel NN-70 samples were analyzed, as well as the mechanisms that led to the damage of the sample surfaces.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70
T1  - Mechanisms and morphologies of cavitation damage of NN 70 steel
EP  - 105
IS  - 2
SP  - 95
VL  - 2021
DO  - 10.5937/zasmat2102095A
ER  - 

@article{
author = "Aleksić, Vujadin and Dojčinović, Marina and Milović, Ljubica and Zečević, Bojana and Maksimović, Ana",
year = "2021",
abstract = "Polomljene epruvete za ispitivanje niskocikličnim zamorom čelika Nionikral 70 (NN-70) osnovnog materijala (OM) i simulirane zone pod uticajem toplote (SZUT) poslužile su NAM za izradu uzoraka za ispitivanje otpornosti na kavitaciju. Za ispitivanje u laboratorijskim uslovima primenjena je ultrazvučna vibraciona metoda kavitacije (metoda stacionarnog uzorka). Uslovi i procedura ispitivanja, priprema uzoraka kao i interpretacija rezultata definisani su standardom ASTM G32. Površine uzoraka čelika NN-70 OM i SZUT bile su izložene dejstvu kavitacije i praćenju oštećenja kroz određeno vreme. Merenje gubitka mase uzoraka na analitičkoj vagi posle određenog vremena omogućilo NAM je određivanje kavitacione brzine kao mere procene otpornosti materijala na dejstvo kavitacije. Za praćenje varijacija u morfologiji površine s promenom vremena ispitivanja primenjena je skenirajuća elektronska mikroskopija (SEM). Na osnovu rezultata ispitivanja otpornosti na kavitaciju u radu su analizirane morfologije oštećenja površina za različita vremena izlaganja dejstvu kavitacije uzoraka OM i SZUT čelika NN-70 kao i mehanizmi koji su doveli do oštećenja površina uzoraka., Broken test tubes for low-cycle fatigue testing of Nionicral 70 (NN-70) parent material (PM) steel and simulated heat-affected zones (SHAZ) were used to produce samples for cavitation resistance testing. Ultrasonic vibrational cavitation method (stationary sample method) was applied for testing in laboratory conditions. The test conditions and procedure, sample preparation and interpretation of results are defined by ASTM G32. The surfaces of the NN-70 PM and SHAZ steel samples were exposed to cavitation and damage monitoring over time. Measuring the weight loss of samples on the analytical balance after a certain time allowed us to determine the cavitation velocity as a measure of the material's resistance to the effect of cavitation. Scanning electron microscopy (SEM) was applied to monitor variations in surface morphology with changing test time. On the basis of the results of the cavitation resistance test, the morphologies of the surface damage for different exposure times of the cavitation of PM and SHAZ steel NN-70 samples were analyzed, as well as the mechanisms that led to the damage of the sample surfaces.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70, Mechanisms and morphologies of cavitation damage of NN 70 steel",
pages = "105-95",
number = "2",
volume = "2021",
doi = "10.5937/zasmat2102095A"
}

Aleksić, V., Dojčinović, M., Milović, L., Zečević, B.,& Maksimović, A.. (2021). Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 2021(2), 95-105.
https://doi.org/10.5937/zasmat2102095A

Aleksić V, Dojčinović M, Milović L, Zečević B, Maksimović A. Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70. in Zaštita materijala. 2021;2021(2):95-105.
doi:10.5937/zasmat2102095A .

Aleksić, Vujadin, Dojčinović, Marina, Milović, Ljubica, Zečević, Bojana, Maksimović, Ana, "Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70" in Zaštita materijala, 2021, no. 2 (2021):95-105,
https://doi.org/10.5937/zasmat2102095A . .

TY  - JOUR
AU  - Zečević, Bojana
AU  - Milović, Ljubica
AU  - Burzić, Zijah
AU  - Maksimović, Ana
AU  - Aleksić, Vujadin
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/403
AB  - Due to its superior strength at high temperatures P/T91 steel is often applied in the chemical, petrochemical and fossil-fired power generation industries. The high strength is achieved by a suitable martensitic microstructure after appropriate heat treatment procedure. Welding is the most important process of joining the components in such plants, and the heat-affected zone is often the weakest part of these structures. Having in mind that the welded joint is the weakest area, it is necessary to know its properties and assess the level of its degradation. It was found that the life-limiting factor in case of P/T91 steel welded structures are the cracks located in the heat affected zones, more precisely in its intercritical region. In present paper the results of the fracture toughness measurement carried out on simulated P91 steel ICHAZ specimens produced using a weld simulator has been presented. The tests were done on two types of simulated specimens, those subjected to the subsequent PWHT and with those left untreated (without PWHT), at room temperature and 600 degrees C. For the J-integral estimation pin-loaded SEN(T) specimens were tested in plane stress conditions using the unloading compliance method of deriving a single specimen resistance curve and the eta-method.
PB  - Springer, New York
T2  - Experimental Techniques
T1  - J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel
DO  - 10.1007/s40799-021-00487-9
ER  - 

@article{
author = "Zečević, Bojana and Milović, Ljubica and Burzić, Zijah and Maksimović, Ana and Aleksić, Vujadin",
year = "2021",
abstract = "Due to its superior strength at high temperatures P/T91 steel is often applied in the chemical, petrochemical and fossil-fired power generation industries. The high strength is achieved by a suitable martensitic microstructure after appropriate heat treatment procedure. Welding is the most important process of joining the components in such plants, and the heat-affected zone is often the weakest part of these structures. Having in mind that the welded joint is the weakest area, it is necessary to know its properties and assess the level of its degradation. It was found that the life-limiting factor in case of P/T91 steel welded structures are the cracks located in the heat affected zones, more precisely in its intercritical region. In present paper the results of the fracture toughness measurement carried out on simulated P91 steel ICHAZ specimens produced using a weld simulator has been presented. The tests were done on two types of simulated specimens, those subjected to the subsequent PWHT and with those left untreated (without PWHT), at room temperature and 600 degrees C. For the J-integral estimation pin-loaded SEN(T) specimens were tested in plane stress conditions using the unloading compliance method of deriving a single specimen resistance curve and the eta-method.",
publisher = "Springer, New York",
journal = "Experimental Techniques",
title = "J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel",
doi = "10.1007/s40799-021-00487-9"
}

Zečević, B., Milović, L., Burzić, Z., Maksimović, A.,& Aleksić, V.. (2021). J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel. in Experimental Techniques
Springer, New York..
https://doi.org/10.1007/s40799-021-00487-9

Zečević B, Milović L, Burzić Z, Maksimović A, Aleksić V. J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel. in Experimental Techniques. 2021;.
doi:10.1007/s40799-021-00487-9 .

Zečević, Bojana, Milović, Ljubica, Burzić, Zijah, Maksimović, Ana, Aleksić, Vujadin, "J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel" in Experimental Techniques (2021),
https://doi.org/10.1007/s40799-021-00487-9 . .

TY  - JOUR
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/409
AB  - The cycle loading of a material results in the modification of its properties and so in this paper is presented the behaviour of the fatigue life using low-cycle fatigue parameters. By applying the Coffin-Manson equation in fatigue loading of the tested specimens, the crack initiation has been computed. The stabilized hysteresis loop is a characteristic of all hystereses and it is used to determine all of the parameters for the low cycle fatigue (LCF) assessment. The experimental results have given us important information on the understanding of fatigue behaviour of high strength low-alloyed steel (HSLA) and its welded joints.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Determination of the Coffin-Manson equation under low-cycle fatigue conditions
EP  - 228
IS  - 3
SP  - 225
VL  - 21
UR  - https://hdl.handle.net/21.15107/rcub_technorep_4787
ER  - 

@article{
author = "Bulatović, Srđan and Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana",
year = "2021",
abstract = "The cycle loading of a material results in the modification of its properties and so in this paper is presented the behaviour of the fatigue life using low-cycle fatigue parameters. By applying the Coffin-Manson equation in fatigue loading of the tested specimens, the crack initiation has been computed. The stabilized hysteresis loop is a characteristic of all hystereses and it is used to determine all of the parameters for the low cycle fatigue (LCF) assessment. The experimental results have given us important information on the understanding of fatigue behaviour of high strength low-alloyed steel (HSLA) and its welded joints.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Determination of the Coffin-Manson equation under low-cycle fatigue conditions",
pages = "228-225",
number = "3",
volume = "21",
url = "https://hdl.handle.net/21.15107/rcub_technorep_4787"
}

Bulatović, S., Aleksić, V., Milović, L.,& Zečević, B.. (2021). Determination of the Coffin-Manson equation under low-cycle fatigue conditions. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 21(3), 225-228.
https://hdl.handle.net/21.15107/rcub_technorep_4787

Bulatović S, Aleksić V, Milović L, Zečević B. Determination of the Coffin-Manson equation under low-cycle fatigue conditions. in Structural Integrity and Life. 2021;21(3):225-228.
https://hdl.handle.net/21.15107/rcub_technorep_4787 .

Bulatović, Srđan, Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, "Determination of the Coffin-Manson equation under low-cycle fatigue conditions" in Structural Integrity and Life, 21, no. 3 (2021):225-228,
https://hdl.handle.net/21.15107/rcub_technorep_4787 .

TY  - JOUR
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Milović, Ljubica
AU  - Zečević, Bojana
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/402
AB  - Brittle damages have been examined widely since welding became common practice when it comes to carrying out robust structures. Welded structure of the ship hull has to be continuous. Brittle damages that occur on hull structures have always been examined thoroughly. Cracks are most commonly initiated at locations where stress concentrators exist. These concentrators can originate due to flaws that occur during the design phase or due to mistakes that occur during the assembly of the structure. When it comes to failures and damages that occur at ship structures, it has been noticed that damages due to brittleness practically always happen at low temperatures. Impact test analysis is significant due to the fact that it replicates the ductile to brittle transition of steel in practically identical range of temperatures for all ship structures. Impact of ductile-brittle transition temperature is an important factor especially because there have been many ship failures and damages in history. In ship structures made of welded joints of high strength low-alloy (HSLA) steels with their segments (parent metal, weld metal and heat-affected- zone), the toughness test determines the tendency of steel to brittle fracture, respectively the tendency to increase brittleness during exploitation. Parameters obtained by testing the properties of plasticity are the fundamental for the composition of ship structures with the aim of realize strengths under tested load. The test results of high strength low-alloy steel toughness assessment at different test temperatures show that temperature significantly affects the impact toughness of steels and their alloys.
PB  - Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb
T2  - Brodogradnja
T1  - An analysis of impact testing of high strength low-alloy steels used in ship construction
EP  - 12
IS  - 3
SP  - 1
VL  - 72
DO  - 10.21278/brod72301
ER  - 

@article{
author = "Bulatović, Srđan and Aleksić, Vujadin and Milović, Ljubica and Zečević, Bojana",
year = "2021",
abstract = "Brittle damages have been examined widely since welding became common practice when it comes to carrying out robust structures. Welded structure of the ship hull has to be continuous. Brittle damages that occur on hull structures have always been examined thoroughly. Cracks are most commonly initiated at locations where stress concentrators exist. These concentrators can originate due to flaws that occur during the design phase or due to mistakes that occur during the assembly of the structure. When it comes to failures and damages that occur at ship structures, it has been noticed that damages due to brittleness practically always happen at low temperatures. Impact test analysis is significant due to the fact that it replicates the ductile to brittle transition of steel in practically identical range of temperatures for all ship structures. Impact of ductile-brittle transition temperature is an important factor especially because there have been many ship failures and damages in history. In ship structures made of welded joints of high strength low-alloy (HSLA) steels with their segments (parent metal, weld metal and heat-affected- zone), the toughness test determines the tendency of steel to brittle fracture, respectively the tendency to increase brittleness during exploitation. Parameters obtained by testing the properties of plasticity are the fundamental for the composition of ship structures with the aim of realize strengths under tested load. The test results of high strength low-alloy steel toughness assessment at different test temperatures show that temperature significantly affects the impact toughness of steels and their alloys.",
publisher = "Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb",
journal = "Brodogradnja",
title = "An analysis of impact testing of high strength low-alloy steels used in ship construction",
pages = "12-1",
number = "3",
volume = "72",
doi = "10.21278/brod72301"
}

Bulatović, S., Aleksić, V., Milović, L.,& Zečević, B.. (2021). An analysis of impact testing of high strength low-alloy steels used in ship construction. in Brodogradnja
Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb., 72(3), 1-12.
https://doi.org/10.21278/brod72301

Bulatović S, Aleksić V, Milović L, Zečević B. An analysis of impact testing of high strength low-alloy steels used in ship construction. in Brodogradnja. 2021;72(3):1-12.
doi:10.21278/brod72301 .

Bulatović, Srđan, Aleksić, Vujadin, Milović, Ljubica, Zečević, Bojana, "An analysis of impact testing of high strength low-alloy steels used in ship construction" in Brodogradnja, 72, no. 3 (2021):1-12,
https://doi.org/10.21278/brod72301 . .

TY  - JOUR
AU  - Hemer, Abubkr
AU  - Milović, Ljubica
AU  - Grbović, Aleksandar
AU  - Aleksić, Bojana
AU  - Aleksić, Vujadin
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/378
AB  - Most of the serious weldment failures lead to catastrophic consequences in terms of damage of other equipment, loss of production, and risks to workers' health and safety. Hence, there is motivation to find margin between safety and disaster. This necessitates guaranteeing the integrity of a welded structure even if a crack is present. Therefore, influence of the material inhomogeneity and residual stresses on deformation and fracture behavior needs to be described precisely. Fracture mechanics parameters J - integral and CTOD have attracted great interest in recent years. Two three point bending specimens of base metal (BM) and weld metal (WM) were tested according to standard BS EN ISO 15653. Than, a two dimensional finite element analysis was performed in Ansys Workbench software to calculate J-integral, and compare with experimental results. The aim of this work is to explore the possibility of using the test results in the reliable prediction of weldment fracture.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Numerical determination and experimental validation of the fracture toughness of welded joints
VL  - 107
DO  - 10.1016/j.engfailanal.2019.104220
ER  - 

@article{
author = "Hemer, Abubkr and Milović, Ljubica and Grbović, Aleksandar and Aleksić, Bojana and Aleksić, Vujadin",
year = "2020",
abstract = "Most of the serious weldment failures lead to catastrophic consequences in terms of damage of other equipment, loss of production, and risks to workers' health and safety. Hence, there is motivation to find margin between safety and disaster. This necessitates guaranteeing the integrity of a welded structure even if a crack is present. Therefore, influence of the material inhomogeneity and residual stresses on deformation and fracture behavior needs to be described precisely. Fracture mechanics parameters J - integral and CTOD have attracted great interest in recent years. Two three point bending specimens of base metal (BM) and weld metal (WM) were tested according to standard BS EN ISO 15653. Than, a two dimensional finite element analysis was performed in Ansys Workbench software to calculate J-integral, and compare with experimental results. The aim of this work is to explore the possibility of using the test results in the reliable prediction of weldment fracture.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Numerical determination and experimental validation of the fracture toughness of welded joints",
volume = "107",
doi = "10.1016/j.engfailanal.2019.104220"
}

Hemer, A., Milović, L., Grbović, A., Aleksić, B.,& Aleksić, V.. (2020). Numerical determination and experimental validation of the fracture toughness of welded joints. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 107.
https://doi.org/10.1016/j.engfailanal.2019.104220

Hemer A, Milović L, Grbović A, Aleksić B, Aleksić V. Numerical determination and experimental validation of the fracture toughness of welded joints. in Engineering Failure Analysis. 2020;107.
doi:10.1016/j.engfailanal.2019.104220 .

Hemer, Abubkr, Milović, Ljubica, Grbović, Aleksandar, Aleksić, Bojana, Aleksić, Vujadin, "Numerical determination and experimental validation of the fracture toughness of welded joints" in Engineering Failure Analysis, 107 (2020),
https://doi.org/10.1016/j.engfailanal.2019.104220 . .

TY  - CONF
AU  - Aleksić, Vujadin
AU  - Aleksić, Bojana
AU  - Prodanović, A.
AU  - Milović, Ljubica
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/380
AB  - In present paper, based on the results of the experimental study of the behaviour of the samples made of a HSLA steel, in the form of round smooth specimens (RSS) under LCF conditions (with controlled and completely reversible strain Δε/2 = const, Rε = εmin/εmax = −1, according to ISO 12106: 2003 (E)) and square specimens (SqS) under conditions of HCF conditions (with controlled one-way variable load on tension with σmin = const, according to ISO 12110-1:2013), a computational stress analysis was performed using the FE method and the behaviour of this steel in the fatigue behaviour simulation (LCF and HCF) in SolidWorks programme was shown. On the basis of the performed analysis of the results of the stress-strain state and the determination of the life using the life isolines for a particular load cycle involving the entire RSS ligament, i.e. SqS for a particular load in a wide range of LCF and HCF loads and comparison with the results of experimental tests, a figure i.e. graphical presentation was given and conclusions were drawn that justify the efforts for numerical assessment of the life cycle of the loaded machine parts.
PB  - Springer
C3  - Lecture Notes in Networks and Systems
T1  - HSLA Steel - Simulation of Fatigue
EP  - 321
SP  - 314
VL  - 128 LNNS
DO  - 10.1007/978-3-030-46817-0_36
ER  - 

@conference{
author = "Aleksić, Vujadin and Aleksić, Bojana and Prodanović, A. and Milović, Ljubica",
year = "2020",
abstract = "In present paper, based on the results of the experimental study of the behaviour of the samples made of a HSLA steel, in the form of round smooth specimens (RSS) under LCF conditions (with controlled and completely reversible strain Δε/2 = const, Rε = εmin/εmax = −1, according to ISO 12106: 2003 (E)) and square specimens (SqS) under conditions of HCF conditions (with controlled one-way variable load on tension with σmin = const, according to ISO 12110-1:2013), a computational stress analysis was performed using the FE method and the behaviour of this steel in the fatigue behaviour simulation (LCF and HCF) in SolidWorks programme was shown. On the basis of the performed analysis of the results of the stress-strain state and the determination of the life using the life isolines for a particular load cycle involving the entire RSS ligament, i.e. SqS for a particular load in a wide range of LCF and HCF loads and comparison with the results of experimental tests, a figure i.e. graphical presentation was given and conclusions were drawn that justify the efforts for numerical assessment of the life cycle of the loaded machine parts.",
publisher = "Springer",
journal = "Lecture Notes in Networks and Systems",
title = "HSLA Steel - Simulation of Fatigue",
pages = "321-314",
volume = "128 LNNS",
doi = "10.1007/978-3-030-46817-0_36"
}

Aleksić, V., Aleksić, B., Prodanović, A.,& Milović, L.. (2020). HSLA Steel - Simulation of Fatigue. in Lecture Notes in Networks and Systems
Springer., 128 LNNS, 314-321.
https://doi.org/10.1007/978-3-030-46817-0_36

Aleksić V, Aleksić B, Prodanović A, Milović L. HSLA Steel - Simulation of Fatigue. in Lecture Notes in Networks and Systems. 2020;128 LNNS:314-321.
doi:10.1007/978-3-030-46817-0_36 .

Aleksić, Vujadin, Aleksić, Bojana, Prodanović, A., Milović, Ljubica, "HSLA Steel - Simulation of Fatigue" in Lecture Notes in Networks and Systems, 128 LNNS (2020):314-321,
https://doi.org/10.1007/978-3-030-46817-0_36 . .