The hot tensile tests of TC4 titanium alloy are done on an electronic universal tensile testing machine RG2000-20 in the range of temperature 850 ℃ ～ 920 ℃ and strain rate 0.000 01 ～ 0.001s-1.Through the test,the true stress-strain curves at different temperature and strain rate are figured out and the influence of the temperature and strain rate on the tensile test curves is analyzed,and then the constitutive equations under the high temperature condition are established based on the improved Hooke Law and Grosman equation.%通过在RG2000-20电子万能试验拉伸机上进行热拉伸试验,研究了TC4钛舍金在850℃～ 920℃温度范围内和应变速率为0.000 01～0.001s-1条件下的流动应力行为,通过计算得到真实应力、应变曲线,分析了温度、应变速率对TC4钛合金高温热拉伸行为的影响.针对式样的塑性变形阶段使用Grosman方程,弹性变形阶段使用改进的Hooke Law,建立TC4钛合金在高温拉伸时的本构方程.
展开▼
