Improvement of high cycle fatigue properties on SUS304 by Water Jet Peening

Abstract

Water jet peening (WJP) treatment is one of the surface improvement technique. It is mainly used preventing the stress corrosion crack (SCC) damage. In this study, in order to investigate the effect of WJP treatment on the fatigue properies of SUS304 austenite stainless steel, rotating bending fatigue tests were carried out on the WJP treated SUS304 steel. In consequence, the fatigue strength of the WJP treated SUS304 was improved. And the X-ray measurement and the hardness tests were also carried out on the WJP treated SUS304,it shows that there exists the hardening layer and the compressive residual stress layer on the surface. It was successful that the WJP treatment improves the fatigue properties of SUS304.