F40MnV钢高温流动应力的预测

Prediction of High-temperature Flow Stress on Steel F40MnV

研究了F40MnV钢的高温流变行为。基于Arrhenius方程建立了本构模型并对该钢的流动应力进行了预测。结果表明,当变形速度较小时,材料的流动应力表现出动态回复和动态再结晶特征;当变形温度较低变形速度较大时,材料的动态回复和动态再结晶特征不明显。实验值与本构模型的预测值之间的相关系数(R)和平均相对误差(AARE)分别为0.993和5.56%。

The high-temperature rheological behavior of the steel F40MnV was investigated. The constitutive model based on Arrhenius equation was established and the flow stress of the steel was predicted. The results show that the flow stress of the steel presents the characteristics of dynamic recovery and recrystallization when the deformation rate is low. But the characteristics of dynamic recovery and recrystallization are not obvious when the deformation temperature is low but the deformation rate is high. The correlation coefficient and average relative error between the experimental and the predicted values based on the constitutive model are 0.993 and 5.56%, respectively.