The Effect of Shot Peening on Residual Stress and Stress Corrosion Cracking for Austenitic Stainless Steel

Author:  M. Obata, A. Sudo, J. Matsumoto
Source:  Conf Proc: ICSP-6, (p. 24-33)
Doc ID:  1996048
Year of Publication:  1996
Abstract:  
The water injection type processing machine was developed which could be operated under water, to apply shot peening to in-core components in light water nuclear reactors. The effects of processing papameters on the residual stress depth profiles were examined to get the optimum processing cinditions to suppress stress corrosion cracking (SCC). Creviced Bent Beam (CBB) type stress corrosion tests showed that the SCC resistance in Type 304 stainless steel was remarkably increased by the shot peening. It was ascertained that shot peening had no detrimental effects to the other material characteristics such as the general corrosion resistance, microstructure. The applicability of the shot peening to in-core components was proven by stress relaxation tests, residual stress measurements using the neutron irradiated specimen and the oxide filming treated specimen.