G040033 Top Runner Incubation Center for Academia-Industry Fusion, Nagaoka University of Technology

Abstract

Although the plastic strain induced in materials increases the fatigue strength, it may reduce the fatigue strength due to a stress concentration part in the components. In this study, damage behavior of notched part of austenitic stainless steels subjected to overload was investigated. The change in the Vickers hardness and hole shape due to plastic strain were examined for Type 316L stainless steel. The degree of plastic strain became severe around the holes and damage of stress concentration part is heavier than that of smooth area.