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首页> 外文期刊>Journal of Manufacturing Processes >Microstructure evolution and unified constitutive equations for the elevated temperature deformation of SAE 52100 bearing steel
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Microstructure evolution and unified constitutive equations for the elevated temperature deformation of SAE 52100 bearing steel

机译：SAE 52100轴承钢升高变形的微观结构演化与统一组成方程

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摘要

Microstructure evolution and hot deformation behaviors of bearing steel SAE 52100 were investigated by hot compression test at temperatures from 950 degrees C to 1160 degrees C and strain rates from 0.1s(-1) to 10.0s(-1). The effects of process parameters (strains, strain rates and temperatures) on recrystallization behavior and plastic flow behavior were discussed. A set of unified visco-plastic constitutive model was built using internal state variables modeling method to predict microstructure evolution and flow stress of bearing steel SAE 52100 during hot deformation. Material parameters within constitutive model were determined using genetic algorithm (GA) optimization technology. The developed model was validated using experimental average grain size, recrystallized fraction and effective stress. Good agreements have been obtained for the predicted and experimental results. It indicates that the derived constitutive model is reliable. Microstructure evolution of SAE 52100 steel in hot metal forming was analyzed using the derived model.
机译：通过从950℃至1160℃的温度下热压缩试验研究了轴承钢SAE 52100的微观结构演化和热变形行为，从0.1s（-1）至10.0s（-1）的应变速率。讨论了工艺参数（菌株，应变率和温度）对再结晶行为和塑料流动行为的影响。使用内部状态变量建模方法建立了一组统一的粘塑料本构模型，以预测热变形期间轴承钢SAE 52100的微观结构演化和流量应力。使用遗传算法（GA）优化技术确定本构模型内的材料参数。使用实验平均晶粒尺寸，重结晶分数和有效应力进行验证开发的模型。已经获得了预测和实验结果的良好协议。它表明导出的本体模型是可靠的。用衍生模型分析了SAE 52100钢的微观结构演化。

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