G031061 Fatigue properties of ultra-fine grain austenitic stainless steel and effect of hydrogen

Abstract

Austenitic stainless steel is used as a hydrogen compatible material. However, it has the disadvantage of a low yield strength. In this study, the tensile and fatigue properties of an ultra-fine grain austenitic stainless steel were investigated. The effect of hydrogen was also characterized. The fine-grained material shows a significant improvement in the proof strength as well as the fatigue strength. In addition the deterioration due to hydrogen was minor.