Maksimović, Ana

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  • Maksimović, Ana (23)
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Author's Bibliography

Numerical Determination of the Life of Steel Exposed To Low Cycle Fatigue

Aleksić, Vujadin; Bulatović, Srđan; Zečević, Bojana; Maksimović, Ana; Milović, Ljubica

(2023)

TY  - JOUR
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/805
AB  - In the paper, based on the results of the experimental research of high-strength low-alloy steel
(HSLA), Nionicral 70 (NN-70), under conditions of low-cycle fatigue (LCF), a numerical analysis of
stress and determination of the life of steel samples was performed. Experimental testing of the
behavior of the samples were performed with controlled and fully reversible strain (/2 = const,
R = min/max = -1), according to the standard ISO 12106:2003 (E). For computational analyses, the
following were used: the method of least squares and the method of finite elements (FEM). 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. The analysis justified the effort to numerically solve the estimation
of the lifespan of steel under low cycle fatigue (LCF).
T2  - Advanced Technologies & Materials
T1  - Numerical Determination of the Life of Steel Exposed To Low Cycle Fatigue
EP  - 76
IS  - 2
SP  - 69
VL  - 48
DO  - 10.24867/ATM-2023-2-005
ER  - 
@article{
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 the experimental research of high-strength low-alloy steel
(HSLA), Nionicral 70 (NN-70), under conditions of low-cycle fatigue (LCF), a numerical analysis of
stress and determination of the life of steel samples was performed. Experimental testing of the
behavior of the samples were performed with controlled and fully reversible strain (/2 = const,
R = min/max = -1), according to the standard ISO 12106:2003 (E). For computational analyses, the
following were used: the method of least squares and the method of finite elements (FEM). 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. The analysis justified the effort to numerically solve the estimation
of the lifespan of steel under low cycle fatigue (LCF).",
journal = "Advanced Technologies & Materials",
title = "Numerical Determination of the Life of Steel Exposed To Low Cycle Fatigue",
pages = "76-69",
number = "2",
volume = "48",
doi = "10.24867/ATM-2023-2-005"
}
Aleksić, V., Bulatović, S., Zečević, B., Maksimović, A.,& Milović, L.. (2023). Numerical Determination of the Life of Steel Exposed To Low Cycle Fatigue. in Advanced Technologies & Materials, 48(2), 69-76.
https://doi.org/10.24867/ATM-2023-2-005
Aleksić V, Bulatović S, Zečević B, Maksimović A, Milović L. Numerical Determination of the Life of Steel Exposed To Low Cycle Fatigue. in Advanced Technologies & Materials. 2023;48(2):69-76.
doi:10.24867/ATM-2023-2-005 .
Aleksić, Vujadin, Bulatović, Srđan, Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, "Numerical Determination of the Life of Steel Exposed To Low Cycle Fatigue" in Advanced Technologies & Materials, 48, no. 2 (2023):69-76,
https://doi.org/10.24867/ATM-2023-2-005 . .

Fatigue crack growth rate of a low carbon microalloyed steel for high temperatures

Zečević, Bojana; Maksimović, Ana; Milović, Ljubica; Aleksić, Vujadin; Bulatović, Srđan

(Elsevier B.V., 2023)

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/123456789/654
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.
C3  - 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  - 
@conference{
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 . .

Experimental Determination of JIc for a HSLA Steel Welded Joint

Maksimović, Ana; Petrovski, Blagoj; Milović, Ljubica; Aleksić, Bogdan; Aleksić, Vujadin; Bulatović, Srđan

(2023)

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
EP  - 30
SP  - 30
UR  - https://hdl.handle.net/21.15107/rcub_rims_707
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 = "30-30",
url = "https://hdl.handle.net/21.15107/rcub_rims_707"
}
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), 30-30.
https://hdl.handle.net/21.15107/rcub_rims_707
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;:30-30.
https://hdl.handle.net/21.15107/rcub_rims_707 .
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):30-30,
https://hdl.handle.net/21.15107/rcub_rims_707 .

Parameter programs for 3D modeling in the function of nondestructive testing and determination of the lifetime of pressure vessels

Aleksić, Vujadin; Bulatović, Srđan; Zečević, Bojana; Maksimović, Ana; Milović, Ljubica

(UNIVERSITY OF EAST SARAJEVO FACULTY OF TECHNOLOGY, 2023)

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/123456789/767
AB  - Preparation for non-destructive testing (NDT), preparation of test reports, as well as control
calculation of a pressure vessel (PV) using the finite element method (FEM), with or without
identified irregularities, requires the use of commercial programs for parametric modeling,
which allow the rapid creation of three-dimensional (3D) model of the test object. 3D modeling
programs enable the determination of one or more rappers in order to orient the test object,
accurately define the established irregularity or error after NDT, as well as the most critical
part of the PV construction after FEM calculation with the possibility of optimization.
Programs for 3D modeling also enable modeling of determined irregularities after performed
tests that occurred during the construction, calculation, production or exploitation of the PV
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 PV structure with and/or without established
irregularities and errors, with the aim of making the correct decision on the continuation of
exploitation construction of PV or about its degree of rehabilitation
PB  - UNIVERSITY OF EAST SARAJEVO FACULTY OF TECHNOLOGY
C3  - VIII International Congress “Engineering, Environment and Materials in Process Industry“
T1  - Parameter programs for 3D modeling in the function of nondestructive testing and determination of the lifetime of pressure vessels
EP  - 418
SP  - 411
UR  - https://hdl.handle.net/21.15107/rcub_rims_767
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, as well as control
calculation of a pressure vessel (PV) using the finite element method (FEM), with or without
identified irregularities, requires the use of commercial programs for parametric modeling,
which allow the rapid creation of three-dimensional (3D) model of the test object. 3D modeling
programs enable the determination of one or more rappers in order to orient the test object,
accurately define the established irregularity or error after NDT, as well as the most critical
part of the PV construction after FEM calculation with the possibility of optimization.
Programs for 3D modeling also enable modeling of determined irregularities after performed
tests that occurred during the construction, calculation, production or exploitation of the PV
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 PV structure with and/or without established
irregularities and errors, with the aim of making the correct decision on the continuation of
exploitation construction of PV or about its degree of rehabilitation",
publisher = "UNIVERSITY OF EAST SARAJEVO FACULTY OF TECHNOLOGY",
journal = "VIII International Congress “Engineering, Environment and Materials in Process Industry“",
title = "Parameter programs for 3D modeling in the function of nondestructive testing and determination of the lifetime of pressure vessels",
pages = "418-411",
url = "https://hdl.handle.net/21.15107/rcub_rims_767"
}
Aleksić, V., Bulatović, S., Zečević, B., Maksimović, A.,& Milović, L.. (2023). Parameter programs for 3D modeling in the function of nondestructive testing and determination of the lifetime of pressure vessels. in VIII International Congress “Engineering, Environment and Materials in Process Industry“
UNIVERSITY OF EAST SARAJEVO FACULTY OF TECHNOLOGY., 411-418.
https://hdl.handle.net/21.15107/rcub_rims_767
Aleksić V, Bulatović S, Zečević B, Maksimović A, Milović L. Parameter programs for 3D modeling in the function of nondestructive testing and determination of the lifetime of pressure vessels. in VIII International Congress “Engineering, Environment and Materials in Process Industry“. 2023;:411-418.
https://hdl.handle.net/21.15107/rcub_rims_767 .
Aleksić, Vujadin, Bulatović, Srđan, Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, "Parameter programs for 3D modeling in the function of nondestructive testing and determination of the lifetime of pressure vessels" in VIII International Congress “Engineering, Environment and Materials in Process Industry“ (2023):411-418,
https://hdl.handle.net/21.15107/rcub_rims_767 .

Parametric programs for 3D modeling in the function of NDT and determining life of pressure vessels

Aleksić, Vujadin; Bulatović, Srđan; Zečević, Bojana; Maksimović, Ana; Milović, Ljubica

(2023)

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 .

Fatigue crack growth rate of a low carbon microalloyed steel for elevated temperature application

Zečević, Bojana; Maksimović, Ana; Milović, Ljubica; Aleksić, Vujadin; Bulatović, Srđan

(2023)

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 .

Experimental determination and numerical validation of the critical value of the J-integral ofa low carbon microalloyed steel for elevated temperature application

Zečević, Bojana; Maksimović, Ana; Milović, Ljubica; Aleksić, Vujadin; Bulatović, Srđan

(2023)

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 .

Effects of Alloying Elements on the Properties of HSLA Steel

Maksimović, Ana; Zečević, Bojana; Milović, Ljubica; Aleksić, Vujadin

(University of Belgrade - Faculty of Mechanical Engineering, 2023)

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 .

The Finite Element Method in the function of corrosion damage assessment of pipelines

Aleksić, Vujadin; Zečević, Bojana; Bulatović, Srđan; Maksimović, Ana; Milović, Ljubica

(SERBIAN SOCIETY OF CORROSION AND MATERIALS PROTECTION (UISKOZAM), 2023)

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 .

Procedures for preventing corrosion of welded joints

Bulatović, Srđan; Aleksić, Vujadin; Zečević, Bojana; Ristić, Ognjen; Maksimović, Ana

(SERBIAN SOCIETY OF CORROSION AND MATERIALS PROTECTION (UISKOZAM), 2023)

TY  - CONF
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
AU  - Zečević, Bojana
AU  - Ristić, Ognjen
AU  - Maksimović, Ana
PY  - 2023
UR  - http://rims.institutims.rs/handle/123456789/680
AB  - This paper describes the procedures for preventing corrosion of welded joints. Also, a theoretical
overview of the forms of corrosion that are most prevalent in welded joints is presented.
The concept of corrosion in welded joints is very pronounced in real conditions. Welded joints are
inseparable joints that form an integral part of steel welded constructions. The internal energy
increases during the fusion welding especially in the heat affected places around the welded joint,
which become initiating spot of corrosion degradation. That is why it is of vital importance to focus
on ways to increase the resistance of welded structures to the impact of corrosion.
PB  - SERBIAN SOCIETY OF CORROSION AND MATERIALS PROTECTION (UISKOZAM)
C3  - XXIV YuCorr, Divčibare, Serbia-Proceedings
T1  - Procedures for preventing corrosion of welded joints
EP  - 215
SP  - 210
UR  - https://hdl.handle.net/21.15107/rcub_rims_680
ER  - 
@conference{
author = "Bulatović, Srđan and Aleksić, Vujadin and Zečević, Bojana and Ristić, Ognjen and Maksimović, Ana",
year = "2023",
abstract = "This paper describes the procedures for preventing corrosion of welded joints. Also, a theoretical
overview of the forms of corrosion that are most prevalent in welded joints is presented.
The concept of corrosion in welded joints is very pronounced in real conditions. Welded joints are
inseparable joints that form an integral part of steel welded constructions. The internal energy
increases during the fusion welding especially in the heat affected places around the welded joint,
which become initiating spot of corrosion degradation. That is why it is of vital importance to focus
on ways to increase the resistance of welded structures to the impact of corrosion.",
publisher = "SERBIAN SOCIETY OF CORROSION AND MATERIALS PROTECTION (UISKOZAM)",
journal = "XXIV YuCorr, Divčibare, Serbia-Proceedings",
title = "Procedures for preventing corrosion of welded joints",
pages = "215-210",
url = "https://hdl.handle.net/21.15107/rcub_rims_680"
}
Bulatović, S., Aleksić, V., Zečević, B., Ristić, O.,& Maksimović, A.. (2023). Procedures for preventing corrosion of welded joints. in XXIV YuCorr, Divčibare, Serbia-Proceedings
SERBIAN SOCIETY OF CORROSION AND MATERIALS PROTECTION (UISKOZAM)., 210-215.
https://hdl.handle.net/21.15107/rcub_rims_680
Bulatović S, Aleksić V, Zečević B, Ristić O, Maksimović A. Procedures for preventing corrosion of welded joints. in XXIV YuCorr, Divčibare, Serbia-Proceedings. 2023;:210-215.
https://hdl.handle.net/21.15107/rcub_rims_680 .
Bulatović, Srđan, Aleksić, Vujadin, Zečević, Bojana, Ristić, Ognjen, Maksimović, Ana, "Procedures for preventing corrosion of welded joints" in XXIV YuCorr, Divčibare, Serbia-Proceedings (2023):210-215,
https://hdl.handle.net/21.15107/rcub_rims_680 .

Life assessment using the finite element method of high-strength low-alloy steel samples exposed to low-cycle fatigue

Aleksić, Vujadin; Bulatović, Srđan; Zečević, Bojana; Maksimović, Ana; Milović, Ljubica

(2023)

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 .

Experimental Determination of JIc for a HSLA Steel Welded Joint

Maksimović, Ana; Petrovski, Blagoj; Milović, Ljubica; Zečević, Bojana; Aleksić, Vujadin; Bulatović, Srđan; Bekrić, Dragoljub

(Elsevier B.V., 2023)

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 . .

Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I)

Aleksić, Vujadin; Bulatović, Srđan; Zečević, Bojana; Maksimović, Ana; Milović, Ljubica

(University of Zagreb Faculty of Mechanical Engineering and Naval Architecture, 2022)

TY  - JOUR
AU  - Aleksić, Vujadin
AU  - Bulatović, Srđan
AU  - Zečević, Bojana
AU  - Maksimović, Ana
AU  - Milović, Ljubica
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/795
AB  - The design of mechanical components exposed to fatigue load, at a low number of cycles, requires knowledge of the behaviour of the material under the impact of variable load in conditions of controlled strain when cyclic plasticity is present. The aim of testing the quality of the material of the components exposed to low cycle fatigue (LCF) in many industries: Nuclear, aerospace, mechanical, civil engineering and shipbuilding. In order to ensure the reliability and consistency of the results from different laboratories, it is necessary to collect all test data using test and data processing methodologies that are in accordance with a number of key points of ISO 12106: 2017 and/or ASTM E 606-04 standards. This paper defines a new data processing methodology after the LCF testing of steel.
PB  - University of Zagreb Faculty of Mechanical Engineering and Naval Architecture
T2  - Transactions of Famena
T1  - Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I)
EP  - 72
IS  - 4
SP  - 59
VL  - 46
DO  - 10.21278/TOF.464041622
ER  - 
@article{
author = "Aleksić, Vujadin and Bulatović, Srđan and Zečević, Bojana and Maksimović, Ana and Milović, Ljubica",
year = "2022",
abstract = "The design of mechanical components exposed to fatigue load, at a low number of cycles, requires knowledge of the behaviour of the material under the impact of variable load in conditions of controlled strain when cyclic plasticity is present. The aim of testing the quality of the material of the components exposed to low cycle fatigue (LCF) in many industries: Nuclear, aerospace, mechanical, civil engineering and shipbuilding. In order to ensure the reliability and consistency of the results from different laboratories, it is necessary to collect all test data using test and data processing methodologies that are in accordance with a number of key points of ISO 12106: 2017 and/or ASTM E 606-04 standards. This paper defines a new data processing methodology after the LCF testing of steel.",
publisher = "University of Zagreb Faculty of Mechanical Engineering and Naval Architecture",
journal = "Transactions of Famena",
title = "Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I)",
pages = "72-59",
number = "4",
volume = "46",
doi = "10.21278/TOF.464041622"
}
Aleksić, V., Bulatović, S., Zečević, B., Maksimović, A.,& Milović, L.. (2022). Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I). in Transactions of Famena
University of Zagreb Faculty of Mechanical Engineering and Naval Architecture., 46(4), 59-72.
https://doi.org/10.21278/TOF.464041622
Aleksić V, Bulatović S, Zečević B, Maksimović A, Milović L. Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I). in Transactions of Famena. 2022;46(4):59-72.
doi:10.21278/TOF.464041622 .
Aleksić, Vujadin, Bulatović, Srđan, Zečević, Bojana, Maksimović, Ana, Milović, Ljubica, "Processing of Data Obtained by the Testing of Steel under Low Cyclic Fatigue (Part I)" in Transactions of Famena, 46, no. 4 (2022):59-72,
https://doi.org/10.21278/TOF.464041622 . .
1

Određivanja karakterističnih stabilizovanih histereza matematičkom zavisnošću podataka opterećenja kod LCF ispitivanja čelika

Aleksić, Vujadin; Milović, Ljubica; Bulatović, Srđan; Zečević, Bojana; Maksimović, Ana

(2022)


                                            

                                            
Aleksić, V., Milović, L., Bulatović, S., Zečević, B.,& Maksimović, A.. (2022). Određivanja karakterističnih stabilizovanih histereza matematičkom zavisnošću podataka opterećenja kod LCF ispitivanja čelika. .
https://hdl.handle.net/21.15107/rcub_rims_733
Aleksić V, Milović L, Bulatović S, Zečević B, Maksimović A. Određivanja karakterističnih stabilizovanih histereza matematičkom zavisnošću podataka opterećenja kod LCF ispitivanja čelika. 2022;.
https://hdl.handle.net/21.15107/rcub_rims_733 .
Aleksić, Vujadin, Milović, Ljubica, Bulatović, Srđan, Zečević, Bojana, Maksimović, Ana, "Određivanja karakterističnih stabilizovanih histereza matematičkom zavisnošću podataka opterećenja kod LCF ispitivanja čelika" (2022),
https://hdl.handle.net/21.15107/rcub_rims_733 .

Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints

Maksimović, Ana; Milović, Ljubica; Zečević, Bojana; Đorđević, Branislav; Bulatović, Srđan; Aleksić, Vujadin

(Elsevier B.V., 2022)

TY  - CONF
AU  - Maksimović, Ana
AU  - Milović, Ljubica
AU  - Zečević, Bojana
AU  - Đorđević, Branislav
AU  - Bulatović, Srđan
AU  - Aleksić, Vujadin
PY  - 2022
UR  - http://rims.institutims.rs/handle/123456789/734
AB  - This paper is devoted to the ductile–brittle transition behavior of high strength low alloyed structural steel NIOMOL 490K. This steel grade is designed for welded pressure vessels exposed to dynamic loads, operating at temperatures below zero, and that is why it must have acceptable toughness. Due to its importance for the safety assessment of pressure vessels, a characterization of this steel with Charpy V-notch test in range of temperature between-60 ⁰C and +60 ⁰C was undertaken. Ductile-to-brittle transition temperature curves were generated in the present study by using instrumented Charpy pendulum impact test on V-notch specimens. Notches were located in the parent material, heat-affected zone and weld metal. The nil-ductility temperature and tensile properties in temperature range from -60 ⁰C to +60 ⁰C are presented in this paper. We used different test temperatures to better understand ductile-to brittle transition response than just use either Charpy energy or other related ductility criteria.
PB  - Elsevier B.V.
C3  - Procedia Structural Integrity
T1  - Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints
EP  - 1368
SP  - 1361
VL  - 42
DO  - 10.1016/j.prostr.2022.12.173
ER  - 
@conference{
author = "Maksimović, Ana and Milović, Ljubica and Zečević, Bojana and Đorđević, Branislav and Bulatović, Srđan and Aleksić, Vujadin",
year = "2022",
abstract = "This paper is devoted to the ductile–brittle transition behavior of high strength low alloyed structural steel NIOMOL 490K. This steel grade is designed for welded pressure vessels exposed to dynamic loads, operating at temperatures below zero, and that is why it must have acceptable toughness. Due to its importance for the safety assessment of pressure vessels, a characterization of this steel with Charpy V-notch test in range of temperature between-60 ⁰C and +60 ⁰C was undertaken. Ductile-to-brittle transition temperature curves were generated in the present study by using instrumented Charpy pendulum impact test on V-notch specimens. Notches were located in the parent material, heat-affected zone and weld metal. The nil-ductility temperature and tensile properties in temperature range from -60 ⁰C to +60 ⁰C are presented in this paper. We used different test temperatures to better understand ductile-to brittle transition response than just use either Charpy energy or other related ductility criteria.",
publisher = "Elsevier B.V.",
journal = "Procedia Structural Integrity",
title = "Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints",
pages = "1368-1361",
volume = "42",
doi = "10.1016/j.prostr.2022.12.173"
}
Maksimović, A., Milović, L., Zečević, B., Đorđević, B., Bulatović, S.,& Aleksić, V.. (2022). Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints. in Procedia Structural Integrity
Elsevier B.V.., 42, 1361-1368.
https://doi.org/10.1016/j.prostr.2022.12.173
Maksimović A, Milović L, Zečević B, Đorđević B, Bulatović S, Aleksić V. Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints. in Procedia Structural Integrity. 2022;42:1361-1368.
doi:10.1016/j.prostr.2022.12.173 .
Maksimović, Ana, Milović, Ljubica, Zečević, Bojana, Đorđević, Branislav, Bulatović, Srđan, Aleksić, Vujadin, "Determination of ductile-to-brittle transition temperature of NIOMOL 490K steel welded joints" in Procedia Structural Integrity, 42 (2022):1361-1368,
https://doi.org/10.1016/j.prostr.2022.12.173 . .
1
1

Characterization of fracture behavior of a low carbon microalloyed steel for elevated temperature application

Zečević, Bojana; Maksimović, Ana; Milović, Ljubica; Aleksić, Vujadin; Bulatović, Srđan

(2022)

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 .

The effects of alloying elements on mechanical properties of NIOMOL 490K steel

Maksimović, Ana; Milović, Ljubica; Zečević, Bojana; Đorđević, Branislav; Aleksić, Vujadin

(2022)

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 .

The role of drainage systems in the prevention of material degradation of bridge structures

Aleksić, Vujadin; Zečević, Bojana; Bulatović, Srđan; Maksimović, Ana; Milović, Ljubica

(2022)

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 .

Numerical simulation of 14Mov6-3 steel CT-specimen Fracture Behavior

Zečević, Bojana; Maksimović, Ana; Milović, Ljubica; Aleksić, Vujadin; Grbović, Aleksandar; Bulatović, Srđan

(Elsevier B.V., 2022)

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 . .

Determination of LCF Plastic and Elastic Strain Components of Steel

Aleksić, Vujadin; Milović, Ljubica; Bulatović, Srđan; Zečević, Bojana; Maksimović, Ana

(Springer Science and Business Media B.V., 2022)

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 . .
1
1

3D Modeling in the Function of Cavitation Demage Testing at Hydropower Plants

Aleksić, Vujadin; Zečević, Bojana; Bulatović, Srđan; Maksimović, Ana; Milović, Ljubica

(Savez energetičara, 2021)

TY  - CONF
AU  - Aleksić, Vujadin
AU  - Zečević, Bojana
AU  - Bulatović, Srđan
AU  - Maksimović, Ana
AU  - Milović, Ljubica
PY  - 2021
UR  - http://rims.institutims.rs/handle/123456789/773
PB  - Savez energetičara
C3  - Monografija ENERGETIKA 2021: U susret zelenom oporavku, Zbornik radova
T1  - 3D Modeling in the Function of Cavitation Demage Testing at Hydropower Plants
EP  - 363
SP  - 360
UR  - https://hdl.handle.net/21.15107/rcub_rims_773
ER  - 
@conference{
author = "Aleksić, Vujadin and Zečević, Bojana and Bulatović, Srđan and Maksimović, Ana and Milović, Ljubica",
year = "2021",
publisher = "Savez energetičara",
journal = "Monografija ENERGETIKA 2021: U susret zelenom oporavku, Zbornik radova",
title = "3D Modeling in the Function of Cavitation Demage Testing at Hydropower Plants",
pages = "363-360",
url = "https://hdl.handle.net/21.15107/rcub_rims_773"
}
Aleksić, V., Zečević, B., Bulatović, S., Maksimović, A.,& Milović, L.. (2021). 3D Modeling in the Function of Cavitation Demage Testing at Hydropower Plants. in Monografija ENERGETIKA 2021: U susret zelenom oporavku, Zbornik radova
Savez energetičara., 360-363.
https://hdl.handle.net/21.15107/rcub_rims_773
Aleksić V, Zečević B, Bulatović S, Maksimović A, Milović L. 3D Modeling in the Function of Cavitation Demage Testing at Hydropower Plants. in Monografija ENERGETIKA 2021: U susret zelenom oporavku, Zbornik radova. 2021;:360-363.
https://hdl.handle.net/21.15107/rcub_rims_773 .
Aleksić, Vujadin, Zečević, Bojana, Bulatović, Srđan, Maksimović, Ana, Milović, Ljubica, "3D Modeling in the Function of Cavitation Demage Testing at Hydropower Plants" in Monografija ENERGETIKA 2021: U susret zelenom oporavku, Zbornik radova (2021):360-363,
https://hdl.handle.net/21.15107/rcub_rims_773 .

Mehanizmi i morfologije kavitacionog oštećenja čelika Nionikral 70

Aleksić, Vujadin; Dojčinović, Marina; Milović, Ljubica; Zečević, Bojana; Maksimović, Ana

(Inženjersko društvo za koroziju, Beograd, 2021)

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 . .
1

J-integral Analysis of the Simulated Heat-affected Zone of the Elevated-temperature Martensitic Steel

Zečević, Bojana; Milović, Ljubica; Burzić, Zijah; Maksimović, Ana; Aleksić, Vujadin

(Springer, New York, 2021)

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 . .