Dynamic Tensile Behavior and Constitutive Modeling of TC21 Titanium Alloy

论文摘要

The dynamic tensile behaviors of a newly developed Ti-6 Al-2 Sn-2 Zr-3 Mo-1 Cr-2 Nb-Si alloy（referred as TC21 in China） over a wide range of strain rates from quasi-static to dynamic regimes(0.001-1 200 s-1) at different temperatures were experimentally investigated. A split Hopkinson tension bar apparatus and a static material testing system were utilized to study the stress-strain responses under uniaxial tension loading condition. The experimental results indicate that the tensile behavior of TC21 titanium alloy is dependent on the strain rate and temperature. The values of initial yield stress increase with increasing strain rate and decreasing temperature. The effects of strain rate and temperature on the initial yield behavior are estimated by introducing two sensitivity parameters. The phenomenological-based constitutive model, Johnson-Cook model, is suitably modified to describe the rate-temperature dependent constitutive behavior of TC21 titanium alloy. It is observed that the modified model is in good agreement with the experimental data subjected to the investigated range of strain rates and temperatures.

论文目录

• 1 Introduction
• 2 Experimental
•   2.1 Material and specimen
•   2.2 Tension testing equipment
• 3 Results and discussion
•   3.1 The experimental results of TC21 alloy
•   3.2 Constitutive modeling of dynamic tensile behavior
• 4 Conclusions

文章来源

类型: 期刊论文

作者: 李云飞,ZENG Xiangguo

来源: Journal of Wuhan University of Technology(Materials Science) 2019年03期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 金属学及金属工艺

单位: Institute of Systems Engineering,China Academy of Engineering Physics,College of Architecture and Environment,Sichuan University

基金: Funded by the National Natural Science Foundation of China Academy of Engineering Physics and Jointly Set up “NSAF” Joint Fund(No.U1430119)

分类号: TG146.23

页码: 707-716

总页数: 10

文件大小: 1616K

下载量: 33