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采用热模拟压缩实验法研究了Al-0.62Mg-0.73Si合金的热变形行为,分析了热变形过程中温度、应变速率对其流变应力影响规律,并通过构建包含应变的Arrhenius本构关系模型系统地描述了热变形参量对流变应力的影响规律。实验结果表明,在所研究的热变形参数条件下,流变应力曲线均呈现出明显的动态再结晶软化特征。数据分析结果显示应变补偿的Arrhenius本构关系模型可以较为准确地预测Al-0.62Mg-0.73Si合金的热变形流变应力。本研究结果可用于优化Al-0.62Mg-0.73Si合金热变形工艺参数,并为更为全面地研究铝合金热变形行为提供了理论参考。
The thermal deformation behavior of Al-0.62Mg-0.73Si alloy was studied by means of thermal simulation and compression test. The influence of temperature and strain rate on the flow stress was analyzed. The Arrhenius constitutive model including strain The influence of thermal deformation parameters on the flow stress is systematically described. The experimental results show that the rheological stress curves show obvious dynamic recrystallization softening under the studied parameters of thermal deformation. The data analysis shows that strain-compensated Arrhenius constitutive model can predict the hot deformation flow stress of Al-0.62Mg-0.73Si alloy more accurately. The results of this study can be used to optimize the thermal deformation process parameters of Al-0.62Mg-0.73Si alloy, and provide a theoretical reference for a more comprehensive study of thermal deformation behavior of aluminum alloys.