Improvement of Threshold Stress Intensity Factor Range of Stainless Steel by Cavitation Peening

Author:  H. Soyama
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.55-60)
Doc ID:  2014050
Year of Publication:  2014
Abstract:  
In order to investigate the mechanism of improvement of fatigue strength of stainless steel by cavitation peening, a load controlled plate bending fatigue test machine was developed, and the threshold stress intensity factor range ΔKth of stainless steel with and without cavitation peening was investigated. It was revealed that ΔKth of stainless steel was improved from 3.88 MPa √m to 7.11 MPa √m by the cavitation peening. Note that the evaluation method of L1Kth using the load controlled plate bending fatigue test with a notched specimen was useful to investigate effect of mechanical surface treatment such as cavitation peening and shot peening.