OS1009-328 高温押込み試験法によるクリープ構成式の推定法の高精度化

抄録

Creep constitutive equation is needed to conduct damage evaluation for welded part in a high temperature component. However uniaxial creep test has been done to identify some parameter included in the constitutive equation, the typical testing method cannot be applied to the local region in the HAZ. The purpose of this study is to develop the indentation creep test method and to establish the method for estimating the creep constitutive equation. In this paper, the method for estimating the creep constitutive equation is improved. First of all, influence of temperature and size of specimen are discussed. As a result, this method is improved by introducing correction factor in considering relation between size of specimen and impression radius. Next, it is shown that applicable range of this method is identified by conducting inelastic-contact finite element analysis for the cylinder model of HAZ.