Influence of Temperature of Shot Peening on Fatigue Life

Author:  Shilling-Praetzel, Hegemann, Gomez, Gottstein
Source:  Conf Proc: ICSP-5, (p.225-236)
Doc ID:  1993075
Year of Publication:  1993
Abstract:  
This paper addresses the influence of shot peening temperature on micro structure evolution and mechanical properties of spring steel 60SiCr7 in the temperature range between 20 deg C and 250 deg C. In particular, surface roughness, micro hardness andn local distribution of residual stresses in the surface layer were measured before and after fatigue tests. Also fracture surfaces were examined in the scanning electron micorscope. It was found that the local distribution of residual stresses in the surface is drastically changed by shot peening at different temperatures, thus prolonging the fatigue life.