Transactions of Materials and Heat Treatment

Title：Effect of strain distribution on microstructure and properties of TC21 titanium alloy

Authors： Wang Xiaowei1 Dong Yu2 Duan Xianglai3 Li Dongkuan1 Cai Sen1 Wang Deyong1 Ao Kun3 Che Anda3

Unit： 1. Shenyang Aircraft Corporation 2.The First Military Representative Office of Air Equipment in Shenyang 3. Jiangxi Jinghang Aviation Forging & Casting Co. Ltd.

KeyWords： TC21 titanium alloy quasi-β forging integral forming stepwise forming microstructure mechanical properties

ClassificationCode：TG316.2

year,vol(issue):pagenumber：2025,50(2):24-31

Abstract：

In order to study the effect of forging strain distribution on the microstructure and properties of TC21 titanium alloy, the distribution and evolution laws of strain and temperature fields during the integral forming and stepwise forming processes were simulated and analyzed by using the DEFORM-3D finite element software, which was then verified through process experiments. The results show that during the integral forming process, there is a significant temperature rise in the center of forgings, and the strain in the center is much greater than that at the edges. During the stepwise forming process, the strain distribution is more uniform, but the forging time is longer and the temperature of forgings drops significantly. After the integral forming，the range of tensile properties is significantly large，moreover，due to the temperature rise in the center of forgings and the lower deformation at the surface, there is a grain boundary α phase both in the center and on the surface of forgings, resulting in lower plasticity. After the stepwise forming, the overall properties of forgings are more uniform，and the plasticity is improved. The research results indicate that the stepwise forming method is more conducive to the uniformity of the microstructure and properties of TC21 titanium alloy.

Funds：

作者简介：王晓巍（1982-），男，学士，高级工程师,E-mail：wxw22023@qq.com;通信作者：车安达（1988-），男，学士，高级工程师,E-mail：593969534@qq.com

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