Critical analysis of the prediction of stress relaxation from forward creep of Type 316H austenitic stainless steel

被引：42

作者：

Wang, Y. Q. ^{[1
]}

Spindler, M. W. ^{[2
]}

Truman, C. E. ^{[1
]}

Smith, D. J. ^{[1
]}

机构：

[1] Univ Bristol, Dept Mech Engn, Bristol BS8 1TR, Avon, England

[2] EDF Energy Plc, Barnett Way, Gloucester GL 3RS, England

来源：

MATERIALS & DESIGN | 2016年 / 95卷

关键词：

Stress relaxation; Forward creep; Constitutive equations; 316H austenitic stainless steel; BEHAVIOR; DEFORMATION; MODEL; NITROGEN; GRAINS; DAMAGE;

D O I：

10.1016/j.matdes.2016.01.118

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work evaluates the effectiveness of using forward creep deformation laws to predict the observed relaxation behaviour of 316H austenitic stainless steel. A summary of empirical creep methods, forward and stress relaxation experimental data were given. A primary and secondary creep strain rate (RCC-MR) model and an average creep strain rate model are combined with derived material constants to predict a group of stress relaxation tests at temperatures from 475 degrees C to 600 degrees C. The RCC-MR primary creep model predicted the stress relaxation behaviour soundly and the average creep strain rate model underestimated all of the stress relaxation data. The difference between stress relaxations predicted using strain hardening and time hardening versions of the RCC-MR equations are small. Factors affecting the predictions; including limitations in data range, data scatter, selection of a forward creep model, application of a forward model to stress relaxation and difference between forward creep and stress relaxation and are discussed. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：656 / 668

页数：13

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