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2報,SCM435調質鋼に対する単軸応力下での応力緩和現象に関する検討

概要

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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 ones as well as temporal hardening in reloading after relaxation. The authors have experimentally and theoretically examined the effect of strain ageing on a resistance in plastic flow using SCM435 steel. In this paper, both increasing strain ageing during stress relaxation in which strain rate decreases gradually, and temporal hardening in reloading are assessed quantitatively. It is shown that the concept of the viscoplastic constitutive model with consideration of strain ageing has a good applicability to inelastic behavior including relaxation property.
1994-06-25