Fatigue Performance of Shot Peened Cp-Ti: Effect of Prior Severe Plastic Deformation

Author:  C. Teichmann, B. Eigenmann, M. Mhaede and L. Wagner
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.107-112)
Doc ID:  2014059
Year of Publication:  2014
Abstract:  
Shot peening was done on commercially pure titanium (cp-Ti) and the changes in surface and surface layer properties such as surface roughness, micro-hardness and residual stresses were evaluated. Results were compared with material that had been severe plastically deformed by rotary swaging before applying shot peening. High cycle fatigue (HCF) performance of both material conditions was investigated in rotating beam loading. While shot peening alone resulted in the often documented marked improvement in fatigue strength, prior plastic deformation followed by shot peening led to pronounced losses in fatigue performance.