Modeling of flow stress of 42CrMo steel under hot compression

被引：189

作者：

Lin, Yong-Cheng ^{[1
]}

Chen, Ming-Song ^{[1
]}

Zhang, Jun ^{[2
]}

机构：

[1] Cent S Univ, Sch Mech & Elect Engn, Minist Educ, Key Lab Modern Complex Equipment Design & Extreme, Changsha 410083, Peoples R China

[2] Zhengzhou Univ, Sch Chem Engn & Technol, Zhengzhou 450002, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 499卷 / 1-2期

基金：

中国博士后科学基金;

关键词：

42CrMo steel; Hot compression deformation; Flow stress; Constitutive equation; BEHAVIOR; ALLOY; DEFORMATION; STRAIN;

D O I：

10.1016/j.msea.2007.11.119

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The compressive deformation behavior of 42CrMo steel was investigated at temperatures from 850 C to 1150 degrees C and strain rates from 0.01s(-1) to 50s(-1) on a Gleeble-1500 thermo-simulation machine. The results show that the true stress-true strain curves exhibit peak stresses at small strains, then the flow stresses decrease monotonically until high strains, showing a dynamic flow softening. The stress level decreases with increasing deformation temperature and decreasing strain rate, which can be represented by a Zener-Hollomon parameter in an exponent-type equation. A revised model describing the relationships of the flow stress, strain rate and temperature of the 42CrMo steel at elevated temperatures is proposed by compensation of strain. The stress-strain relations of 42CrMo steel predicted by the proposed models agree well with experimental results. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：88 / 92

页数：5

共 16 条

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