Morphology of corrosion fatigue and stress corrosion cracks on low alloy steels

Abstract

The fracture surface appearances are slowly changed through decade’s side by advantages in technology of steel production. Basic requirements for cleaner steels and lower energy consumption during production induce that newer steels have some different fracture features compared to the old ones. This paper describes morphology of different corrosion fatigue and stress corrosion cracks. The brief failure analysis with key results will be presented for each case mentioned in paper, and emphasize will be on morphology and characteristic features of fracture surfaces. Macro appearance of fatigue cracks will be discussed in detail and characteristic features of stress corrosion fractures will be analyzed. Also, the results from scanning electron microscopy will be presented in this paper.