Effect of Shot Peening on Fatigue Strength of Titanium Alloy

Author:  T. Hanyuda, S. Nakamura, T. Endo, H. Shimizu
Source:  Conf Proc: ICSP-5, (p.116-125)
Doc ID:  1993065
Year of Publication:  1993
Abstract:  
It is well known that the fatigue strength of titanium alloys can be improved by shot peening. this study is aimed at optimizing the peening media and peening conditions to improve the high cycle fatigue strength of the a-B type Ti-3A1-2V alloy components with lamellar microstructures and chemically polished surfaces. Stainless steel beads were selected as the most suitable peening media because of the relatively smooth peened surface compared to glass beads and steel beads. Rotating bending fatigue tests were done for specimens peened with stainless steel beads at various peening intensities. The maximum fatigue strength was acheived at the optimum Almen intensity of approximately 0.2 mmN.