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利用Gleeble热模拟机对Ti40合金在变形温度为950~1100℃、应变速率为0.001~1 s-1范围内进行了等温恒应变速率压缩实验。通过分析真应力-真应变曲线,研究了热力参数对流动应力的影响规律,并建立了Ti40合金的本构关系。误差分析表明,该本构方程具有很高的精度,可用于指导Ti40合金热加工工艺制定,并可用于Ti40合金热变形过程的有限元模拟。
The isothermal constant strain rate compression experiment was carried out on the Ti40 alloy at a temperature of 950 ~ 1100 ℃ and a strain rate of 0.001 ~ 1 s-1 using a Gleeble thermal simulator. By analyzing the true stress-true strain curve, the influence of thermal parameters on the flow stress was studied, and the constitutive relation of Ti40 alloy was established. Error analysis shows that the constitutive equation has high precision and can be used to guide the hot processing of Ti40 alloy and can be used for the finite element simulation of thermal deformation of Ti40 alloy.