不同变形速率、温度下TC4薄板焊接件屈服强度表征

Yield Strength of TC4 Thin Plate Weldment under Different Deformation Rates and Temperatures

为了研究温度、变形速率对TC4焊接件的力学性能影响,分别采用100~800℃下变形速率为0.001,0.1,1和10s-1的拉伸试验来表征焊接件的动态力学性能,并基于Johnson-Cook模型对相应变形速率下的屈服强度进行理论计算,而后比较了计算值和实验所测的数值,结果说明可以采用Johnson-Cook模型来表征焊接件的动态力学性能。

The effects of temperature and deformation rate on the mechanical properties of TC4 weldment were studied. The dynamic mechanical properties of the weldment were characterized by tension tests at the deformation rates of 0.001, 0.1, 1 and 10 /s. Based on the Johnson-Cook model, the yield strength of TC4 plate was calculated and the experimental data were compared with calculation values. It is concluded that Johnson-Cook model can be used to characterize the change of the yield strength of TC4 weldment under different deformation rates and temperatures.