SUS304材の粘塑性変形挙動の実験的考察 : クリープおよびラチェット変形挙動

抄録

A unified constitutive model which allows prediction of cyclic plasticity, uniaxial and biaxial ratchetting, creep, and stress relaxation is required in the design of aeronautic equipment, nuclear reactors, etc. Detailed experimental observation considering viscoplastic behavior of materials must be carried out to construct a unified constitutive model. In this paper, uniaxial and biaxial ratchetting tests and creep tests were carried out at both room temperature and at 550°C using SUS 304 stainless steel. As a result, it is clear that uniaxial ratchetting behavior is affected by the viscous deformation of the material, and that biaxial ratchetting behavior is affected by both the viscous deformation of the material and the deformation caused by nonproportional loading.