Low Strain Rate and Large Deformation Constitutive Model of TC6 Titanium Alloy Based on Friction Correction

作者：Zhu Lin; Xu Yong^*; Hu Shengshuang; Chen Leping; Xin Zhouyuan

来源：RARE METAL MATERIALS AND ENGINEERING, 2023, 52(5): 1819-1825.

• TC6 titanium alloy
• traditional friction correction model
• improved friction correction model
• strain-compensated Arrhenius model

The thermal compression test of TC6 titanium alloy under low strain rate and large deformation was carried out by Thermecmastor- Z100kn thermal simulation machine. The true stress-strain curves were obtained when the deformation temperature was 900-945 degrees C, the strain rate was 0.0001-0.1 s(-1) and the deformation degree was 70%. The traditional friction correction model and the improved friction correction model were used to correct the true stress-strain curve, and the strain-compensated Arrhenius model based on the friction correction was established. The results show that the modified friction correction model can better characterize the true stress-strain dynamic response of materials under large deformation. The strain-compensated Arrhenius model modified by friction correction has higher linear correlation, smaller mean absolute error and higher prediction accuracy.

• 单位
  南昌航空大学; y