EFFECT OF SHOT PEENING ON RESIDUAL STRESS AND STRESS CORROSION CRACKING FOR COLD WORKED AUSTENITIC STAINLESS STEEL

Author:  M.Obata and A.Sudo
Source:  Conf Proc: ICSP-5 (pg 257 - 264)
Doc ID:  1993152
Year of Publication:  1993
Abstract:  
ABSTRACT The effectiveness of shot peening as a residual stress improving technique for irradiation hardening materials was investigated using 20% cold worked stainless steel plates which simulated the hardness of irradiation hardening materials. Isotropic compressive residual stress could be built into such high strength materials by shot peening. The hardness of compressive stress layer further increased due to cold working by shot peening. It has been confirmed by MgCl2 immersion tests that the stress corrosion cracking (SCC) at the welding heat affected zone is effectively suppressed by shot peening. KEYWORDS Stress corrosion cracking, hardness, residual stress, MgCl2 immersion test, light water reactor, compressive stress, welding heat affected zone, irradiation hardening