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利用Gleeble-3800热模拟试验机进行热压缩实验,研究了TC4-DT钛合金在温度1163K~1293K、应变速率为0.005s~(-1)~0.5s~(-1)、变形量为60%条件下的热变形行为。根据应力-应变曲线分析该合金的流变应力变化特点,建立该合金的Arrhenius双曲正弦型本构方程。结果表明,所建立的本构方程与实验值吻合程度较高,为制定TC4-DT钛合金热加工工艺规范提供理论依据。
The hot compression tests were carried out on a Gleeble-3800 thermal simulation tester. The effects of strain rate on the TC4-DT titanium alloy at strain rates ranging from 0.005s -1 to 0.5s -1 at a temperature of 1163K ~ 1293K and a deformation of 60% Under the conditions of thermal deformation behavior. According to the stress-strain curve analysis of the flow stress characteristics of the alloy, the alloy Arrhenius hyperbolic sine constitutive equation was established. The results show that the established constitutive equation is in good agreement with the experimental data, and provides a theoretical basis for the development of the TC4-DT titanium alloy hot working process specification.