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Constitutive Model Prediction and Flow Behavior Considering Strain Response in the Thermal Processing for the TA15 Titanium Alloy

机译：TA15钛合金热处理过程中考虑应变响应的本构模型预测和流动行为

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To investigate the flow stress, microstructure, and usability of TA15 titanium alloy, isothermal compression was tested at 1073–1223 K and strain rates of 10, 1, 0.1, 0.01, and 0.001 s−1, and strain of 0.9. The impact of strain and temperature on thermal deformation was investigated through the exponent-type Zener–Hollomon equation. Based on the influence of various material constants (including α, n, Q, and lnA) on the TA15 titanium alloy, the strain effect was included in the constitutive equation considering strain compensation, which is presented in this paper. The validity of the proposed constitutive equation was verified through the correlation coefficient (R) and the average absolute relative error (AARE), the values of which were 0.9929% and 6.85%, respectively. Research results demonstrated that the strain-based constitutive equation realizes consistency between the calculated flow stress and the measured stress of TA15 titanium alloy at high temperatures.
机译：为了研究TA15钛合金的流变应力，显微组织和可用性，在1073–1223 K和10、1、0.1、0.01和0.001 s -1 的应变速率下测试了等温压缩，并且应变为0.9。通过指数型Zener-Hollomon方程研究了应变和温度对热变形的影响。基于各种材料常数（包括α，n，Q和lnA）对TA15钛合金的影响，在考虑应变补偿的本构方程中包括了应变效应，本文对此进行了介绍。通过相关系数（R）和平均绝对相对误差（AARE）验证了所提出的本构方程的有效性，其相关系数分别为0.9929％和6.85％。研究结果表明，基于应变的本构方程实现了TA15钛合金在高温下计算的流动应力与测量应力之间的一致性。

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