Effect of Shot Peening on Fatigue Strength of Carbon Steel at Elevated Temperature

Author:  N. Hasegawa, Y. Watanabe, Y. Kato
Source:  Conf Proc: ICSP-5, (p.134-139)
Doc ID:  1993063
Year of Publication:  1993
Abstract:  
A study has been made on the effect of shot peening on fatigue strength at elevated temperature on 0.50% carbon steel. By means of bending rotating testing over the temperature range from 20 deg.C to 450 deg.C, it was confirmed that shot peening increase the fatigue strength of specimens at room temperature due to work hardening and compressive residual stress at surface layer. And fatigue strength of shot peened specimens decrease with increasing testing temperature due to the reduction of the magnitude of residual stress. In comparison to annealed specimens, however, it was observed that the bendfit of shot peening is appeared up to 400 deg.C by work hardening.