Effect Of Shot Peening On Stress Corrosion Cracking And Corrosion Fatigue

Author:  Speidel, M. O.
Source:  Conf Proc: ICSP-1, (p.625-636)
Doc ID:  1981020
Year of Publication:  1981
Abstract:  
The influence of shot peening on stress corrosion cracking and on corrosion fatigue is reviewed. Stress corrosion cracking is defined as environment-sensitive cracking under constant or increasing stress or strain. Corrosion fatigue is environment-sensitive cracking under cyclic stress or strain. Both, stress corrosion cracking resistance and corrosion fatigue resistance of metallic materials can be substantially improved by shot peening. Localized corrosion, however, such as pitting or intergranular corrosion may severely limit the beneficial effect of shot peening. In such cases a combination of shot peening and a corrosion-resistant surface protection system (anodizing, painting) may provide a better protection than shot peening alone but then, care must be taken to prevent mechanical damage of the surface protection system. Descriptors: Shot peening; Stress corrosion cracking; Corrosion fatigue; Metallic materials; Localized corrosion; Surface protection