Transactions of Materials and Heat Treatment

Title：High strain rate constitutive model and electromagnetic forming application evaluation for 2219 aluminum alloy

Authors： Tang Tianyu Huang Liang Xu Jiahui Xie Bingxin Sun Yiran Shi Tian

Unit： (State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China)

KeyWords： 2219 aluminum alloy constitutive model high strain rate hot deformation behavior electromagnetic forming

ClassificationCode：TG391

year,vol(issue):pagenumber：2024,49(5):125-134

Abstract：

In order to explore the high strain rate deformation behavior of 2219 aluminum alloy during electromagnetic forming, the high strain rate and high temperature quasi-static tensile experiments of aluminum alloy were conducted by separate Hopkinson tensile rods and thermal simulation testing machine, and the influences of different temperatures and strain rates on the flow stress of 2219 aluminum alloy were analyzed. Then, the strain rate term of traditional J-C constitutive models was corrected and optimized. Furthermore, based on the traditional and optimized J-C constitutive model, the finite element models of electromagnetic forming were established respectively, and the experimental results of electromagnetic forming were compared. The results show that the tensile strength of 2219 aluminum alloy increases first and then decreases with the increasing of strain rate, and the flow stress gradually decreases with the increasing of temperature. The optimized OP J-C constitutive model has the best fitting effect, and linear correlation coefficients R and AARE are 0.9975 and 1.06%, respectively. Compared with the traditional J-C constitutive model, the electromagnetic forming simulation results of the optimized constitutive model are more consistent with the experimental values, which confirms that the optimized constitutive model can accurately describe the high-rate deformation behavior of 2219 aluminum alloy.

Funds：

基金项目:国家自然科学基金面上项目(51975229)；湖北省重点研发计划项目（2020BAB139）；武汉市应用基础前沿项目（2020010601012178）

作者简介：唐天宇（1999-），男，硕士研究生 E-mail：tangtianyu@hust.edu.cn 通信作者：黄亮（1981-），男，博士，教授 E-mail：huangliang@hust.edu.cn

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