金属材料の粘塑性特性とひずみ時効に及ぼす予加工と変形速度の影響 : 第4報, 99.98%純銅に対する単軸応力下での引張り負荷に関する検討

概要

論文の詳細を見る
Generally inelastic properties of metal materials depend on the deformation rate. However, past studies on viscoplastic constitutive equations do not successfully describe actual flow stress properties and stress relaxation properties as well as temporal hardening during reloading after relaxation. We have experimentally and theoretically examined the effect of strain ageing on resistance in plastic flow using SCM435 steel which consists of complex specifications and hence shows considerable strain ageing. In this study, using 99.98% pure copper which is considered a pure material and hence shows little strain ageing, it is shown that strain rate depenence can be assessed quantitatively during loading when strain increases, Compared with the behavior of materials which show considerable strain ageing, it is shown that the concept of the viscoplastic constitutive model with consideration of strain ageing is applicable to problem of inelastic behavior.
1996-05-25