Fatigue Property Improvement Of Type 316l Steel By Cavitation Shotless Peening

Author:  K. MASAKI , Y. OCHI, H. SOYAMA
Source:  Conf Proc: ICSP-10 Tokyo, Japan 2008
Doc ID:  2008053
Year of Publication:  2008
Abstract:  
ABSTRACT To investigate the effects of cavitation shotless peening (CSP) on the high-cycle fatigue properties of Type 316L austenitic stainless steel, rotating bending fatigue tests were conducted on CSP-treated specimens. The fatigue test results were compared with the fatigue properties of a shot peening (SP) treated specimen rendered under the same fatigue testing conditions. It was found that the high-cycle fatigue properties of Type 316L austenitic stainless steel were improved because CSP treatment induced work hardening of the specimen surface and high compressive residual stress near the surface layers. However, the fatigue property of the CSP-treated specimen did not improve as much as that of the SP-treated specimen. This is attributable to the difference in the amount of plastic deformation near the surface layer induced by the CSP treatment as opposed to the SP treatment. KEY WORDS High-cycle fatigue, cavitation shotless peening, austenitic stainless steel, residual stress, fatigue crack behavior