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首页> 外文期刊>Journal of Materials Engineering and Performance >Dynamic Recrystallization Behavior of AISI 422 Stainless Steel During Hot Deformation Processes
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Dynamic Recrystallization Behavior of AISI 422 Stainless Steel During Hot Deformation Processes

机译：热变形过程中AISI 422不锈钢的动态再结晶行为

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摘要

In this work, hot compression tests were performed to investigate the dynamic recrystallization (DRX) process of a martensitic stainless steel (AISI 422) at temperatures of 950, 1000, 1050, 1100 and 1150 A degrees C and strain rates of 0.01, 0.1 and 1 s(-1). The dependency of strain-hardening rate on flow stress was used to estimate the critical stress for the onset of DRX. Accordingly, the critical stress to peak stress ratio was calculated as 0.84. Moreover, the effect of true strain was examined by fitting stress values to an Arrhenius type constitutive equation, and then considering material constants as a function of strain by using a third-order polynomial equation. Finally, two constitutive models were used to investigate the competency of the strain-dependent constitutive equations to predict the flow stress curves of the studied steel. It was concluded that one model offers better precision on the flow stress values after the peak stress, while the other model gives more accurate results before the peak stress.
机译：在该工作中，进行热压缩试验，以研究马氏体不锈钢（AISI 422）的动态再结晶（DRX）过程在950,1000,1050,1100和1150℃的温度和0.01,0.1和1 s（-1）。应变 - 硬化率对流量应力的依赖性用于估计DRX发作的临界应力。因此，计算峰值应力比的临界应力计算为0.84。此外，通过使用三阶多项式方程将应力值拟合应力值，通过使用三阶多项式方程考虑材料常数作为应变的函数来检查真正应变的效果。最后，使用两个构成型模型来研究应变依赖性本构体方程的能力，以预测研究的钢的流量曲线。结论是，在峰值应力后，一种模型在流量应力值上提供更好的精度，而另一种模型在峰值应力之前提供更准确的结果。

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