Transactions of Materials and Heat Treatment

Title：Finite element simulation on deformation behavior in electro-thermal tensile for TC4 titanium alloy

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ClassificationCode：V261.3

year,vol(issue):pagenumber：2022,47(1):185-195

Abstract：

In order to study the influences of tensile rate and temperature on the properties of TC4 titanium alloy, the electro-thermal tensile processes of TC4 titanium alloy at different temperatures and tensile rates were simulated and studied by finite element analysis software ABAQUS combining the method of the electro-thermal-mechanical complete coupling and unified viscoplastic constitutive model of Lin Jianguo, and a set of simulation results with the target temperature of 750 ℃ and the tensile rate of 1 mm·min-1 were compared with the experimental results. The comparison results show that the temperature field obtained after electrified heating in the finite element simulation is similar to the temperature field measured by the thermal imager in the same stage of the experiment, and the average temperature difference of the horizontal line in the middle of the marked distance segment is only 2.1 ℃. In addition, the variation trend of the tensile force-displacement curve obtained by the finite element simulation is similar to that of the experiment curve, the maximum tensile force difference is 0.014 kN and their error is about 2.41%, and the elongation amount difference when the maximum tensile force occurs is 0.148 mm. It can be seen that the finite element simulation results are in good agreement with the experimental results, which proves the reliability of the finite element simulation method. The tensile force-displacement curve obtained by finite element simulation and the experimental curve also show that at the same strain rate, the higher the temperature is, the better the plasticity of titanium alloy is, and the influence of temperature is weakened at the higher strain rate. In addition, at the same temperature, the lower the strain rate is, the better the plasticity of titanium alloy is, and the influence of strain rate is weakened at the lower temperature.

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共性技术（41423030608）

作者简介：党鹏（1997-），男，硕士研究生 E-mail：dangpeng52@163.com 通信作者：王永军（1968-），男，博士，副教授 E-mail：wyongjun@mail.nwpu.edu.cn

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