New Constitutive Model for Hot Working

被引：15

作者：

Chen, Fei ^{[1
,2
]}

Feng, Guowei ^{[1
]}

Cui, Zhenshan ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr & Mold CAD, 1954 Huashan Rd, Shanghai 200030, Peoples R China

[2] Univ Nottingham, Dept Mech Mat & Mfg Engn, Nottingham NG7 2RD, England

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2016年 / 47A卷 / 03期

基金：

中国博士后科学基金;

关键词：

DYNAMIC RECRYSTALLIZATION; CRITICAL STRAIN; FLOW-STRESS; MICROSTRUCTURE EVOLUTION; AUSTENITIC STAINLESS; DEFORMATION; STEEL; KINETICS; CREEP; STATE;

D O I：

10.1007/s11661-015-3280-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Based on plane regressions of a set of key points in the flow curves without using Sellars-Tegart (ST) assumptions, a new approach to determine parameters in classical two-stage constitutive equations in hot working was presented. All the parameters in constitutive equations can be obtained at different temperatures and strain rates. The flow stress and recrystallized volume fraction can be predicted when workpieces undergo different conditions during plastic deformation. Experiment data of 12 pctCr was used to verify the model. The results show that when using ST model, some bounces occurred near the critical points, while using the proposed model, the results show better precision especially in determining the characteristic points such as critical strain, peak strain, and steady stress. (C) The Minerals, Metals & Materials Society and ASM International 2015

引用

页码：1229 / 1239

页数：11

共 53 条

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