(S040_1)Deformation and dissolution of Cu particles in iron matrix during cold-rolling

摘要

There have been a lot of fundamental studies on the age-hardening behavior in Fe-Cu alloys and their mechanical properties. The Cu precipitate in iron matrix is characterized as "soft"' particle with a lower shear modulus and a lower yield stress compared with those of iron. Thus, Cu particle itself can plastically deform during cold working together with matrix iron . In addition, it was reported that Cu particle would be dissolved by severe plastic deformation in aged Fe-Cu alloy2). Since the deformability of Cu bearing steel should be influenced by the deformation and dissolution behavior of Cu particles, it is important to understand the state of Cu particles in cold-worked materials. The purpose of this study is to clarify the structure of Cu particles and discuss the possibility of dissolution of them in a severely cold-roEed Fe-Cu alloy.