Abstract
Rotating bending fatigue tests were conducted to investigate the effect of zirconia shot peening on fatigue properties of Ti-6Al-4V ELI alloy. Specimen was treated in three different shot peening conditions. As a result, the fatigue lives of shot peened specimen were longer life than non-peened specimen. Fish eyes were observed in the fracture surface of the most shot peened specimen. And there was the facet or the fine granular region in near the crack initiation site of the fish eye. And then, fracture morphology of shot peened specimens is different by peening conditions. From the investigation result of some peening effects, the fatigue properties were affected to compressive residual stress values at the surface of specimen.
