在Gleeble-1500热物理模拟机上对多组TA15钛合金试样进行压缩试验,获得了不同变形温度、应变速率和应变下的应力-应变曲线。结果表明,应力迅速达到峰值后呈下降趋势,峰值应力随变形温度的升高而减小,随应变速率的增加而增大;引入包含软化因子的本构模型,并采用多元线性回归法可求解相应的系数。 In the Gleeble-1500 thermophysical simulator, several sets of TA15 titanium alloy samples were subjected to compression tests, and the stress-strain curves under different deformation temperatures, strain rates and strains were obtained. The results showed that the stress peaked rapidly and then decreased. The peak stress decreased with the increase of deformation temperature and increased with the increase of strain rate. A constitutive model with softening factor was introduced and solved by multivariate linear regression The corresponding coefficient.