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首页> 外文期刊>Journal of Materials Engineering and Performance >Constitutive Modeling of 17-4PH Stainless Steel Sheet at Elevated Temperature and Statistical Optimization
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Constitutive Modeling of 17-4PH Stainless Steel Sheet at Elevated Temperature and Statistical Optimization

机译：17-4PH不锈钢板在高温和统计优化中的组成型建模

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摘要

The tensile flow behavior of 17-4PH stainless steel sheet was investigated from 650 degrees C to 850 degrees C at strain rates of 10(-4) to 10(-1) s(-1). The result indicates that work hardening and dynamic recovery are exhibited in the tensile test in the temperature lower than 750 degrees C, and a steady stage of stress occurs higher than 750 degrees C because of dynamic recrystallization. After a step-by-step procedure for data analysis in the hot tensile test, the original constitutive model was given. Considering the strain compensation, several revised constitutive models of Arrhenius-type were constructed with statistical optimization and multi-strain correction. The comparison shows perfect accurate flow predictions through multi-strain modified models. Meanwhile, the flow behavior of random conditions is predicted accurately by a single correction model with Tikhonov regularization.
机译：以650℃至850℃以10（-4）至10（-1）（-1）的应变速率从650℃至850℃研究了17-4ph不锈钢片的拉伸流动行为。 结果表明，在低于750℃的温度下，在拉伸试验中表现出工作硬化和动态恢复，并且由于动态再结晶，应变的稳定应力阶段高于750℃。 在热拉伸试验中数据分析的逐步过程之后，给出了原始本构模型。 考虑到应变补偿，构建了统计优化和多应变校正的若干修正的Arrhenius型本构模型。 该比较通过多应变修改模型显示了完美的准确流预测。 同时，通过具有Tikhonov规则化的单个校正模型准确地预测随机条件的流动行为。

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