Isothermal hot compression experiments of F45V, a microalloyed steel, were performed on a Gleeble-1500 thermo-mechanical simulator at temperatures of 950-1200 ℃ and strain rate of 0. 01-10 s-1. Based on the experimental flow stress curves, a constitutive model that was expressed by the hyperbolic laws in an Arrhenius-type equation was established, and the material parameters of the model were expressed as 6th order polynomial form of strain. Standard statistical parameters such as correlation coefficient and average absolute relative error were employed to quantify the predictability of the model. They were found to be 0. 995 and 4. 34% respectively. The results show that the established constitutive model can predict the magnitude and tendency of flow stress with the increase of deformation accurately, and can be used for the numerical simulation of hot forging process of the F45V steel.
Abstract
Isothermal hot compression experiments of F45V, a microalloyed steel, were performed on a Gleeble-1500 thermo-mechanical simulator at temperatures of 950-1200 ℃ and strain rate of 0. 01-10 s-1. Based on the experimental flow stress curves, a constitutive model that was expressed by the hyperbolic laws in an Arrhenius-type equation was established, and the material parameters of the model were expressed as 6th order polynomial form of strain. Standard statistical parameters such as correlation coefficient and average absolute relative error were employed to quantify the predictability of the model. They were found to be 0. 995 and 4. 34% respectively. The results show that the established constitutive model can predict the magnitude and tendency of flow stress with the increase of deformation accurately, and can be used for the numerical simulation of hot forging process of the F45V steel.
关键词
F45V /
非调质钢 /
流动应力 /
Arrhenius方程 /
本构模型
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Key words
F45V steel /
microalloyed forging steel /
flow stress /
Arrhenius equation /
constitutive model
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中图分类号：
TG142
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参考文献
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脚注
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基金
山东省自然科学基金
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