Hot Deformation Behavior of 20CrMnTiH Steel Studied by Johnson-Cook Model and Genetic Algorithm

被引：1
作者：
Chai, Rong-Xia [1 ]
Guo, Wei [1 ]
Guo, Cheng [2 ]
机构：
[1] Xian Univ Sci & Technol, Coll Mech Engn, Xian 710054, Peoples R China
[2] Xi An Jiao Tong Univ, Dept Mech Engn, Xian 710049, PR, Peoples R China
来源：
PROCEEDINGS OF 2014 INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE AND ENGINEERING | 2014年 / 1035卷
关键词：
20CrMnTiH steel; Johnson-Cook model; Genetic algorithm; Constitutive equation; PARAMETERS;
D O I：
10.4028/www.scientific.net/AMR.1035.225
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hot compression tests of 20CrMnTiH steel are carried out in the strain rates range from 0.01s(-1) to 10s(-1) and in the temperature range from 973K to 1123K. The flow behaviors of 20CrMnTiH steel are described based on the analysis of true stress-true strain curves. The flow stress increases with the increasing of strain rate and the decreasing of deforming temperature. Johnson-Cook (J-C) model are used to analyze the hot deformation behaviors. In the constitutive model, material constants are determined based upon the experimental data. Genetic algorithm (GA) is proposed with the aim of optimizing the J-C model parameters. Good agreement is acquired by comparing of the experimental results with predicted results. It validates the efficiency of Johnson-Cook model in describing the material constitutive behavior.
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页码：225 / +
页数：2
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