Influence of metallurgical factor for Fatigue Behavior in Carbon Steel Film under Cyclic In-plane Pure Shear Loading

Abstract

At the same materials, mechanical properties of a film different from those of a bulk and we consider that fatigue property of a film is different from that of a bulk. In this study, According to a report by Ueda et al., It was reported that when a thin film experiment was conducted, the occurrence of slips and cracks was small. It has been reported that crystals also differ from in-plane and out-of-plane shear components．Therefore, in this study, we investigated the difference in the location and concentration of slip due to the pearlite volume fraction of carbon steel thin films, and the mode of occurrence of slip using EBSD and metallurgical factors.As for the form of slip, pure iron is near the grain boundary, and in S10C, several slips occur in parallel within the same grain. What was occurring was confirmed.S10C slips are considered to occur only in crystals that satisfy certain conditions, such as having multiple crystals in the film thickness direction and pearlite on both sides. Other non-slip crystals are considered to be plastically deformed due to the high pure shear applied, so slips are occurring but are considered to have been restored.