Al-Mg-Si合金热变形行为与本构关系  

Hot deformation behavior and constitutive relationship of Al-Mg-Si alloy

作　　者：刘建勃[1] 王智毅[1] 马雄[2] 

机构地区：[1]榆林学院能源工程学院,陕西榆林719000 [2]钢铁研究总院高温材料研究所,北京100081

出　　处：《塑性工程学报》2017年第3期197-202,共6页Journal of Plasticity Engineering

基　　金：榆林学院高层次人才科研启动基金项目(11GK57)

摘　　要：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 hot deformation behavior of A1 -0. 62Mg -0. 73Si alloy was investigated by hot compression test. The influence of temperature, strain rate and strain on flow stress during hot deformation process was analyzed, and the influence of hot deformation parameters on flow stress was systematically described by the established constitutive relationship model Arrhenius containing strain. Results show that the dynamic recrystallization softening behavior presents on all of the studied deformation conditions. Data analysis results show that strain- compensated constitutive relationship model Arrhenius can well predict the flow stress of A1-0. 62Mg- 0.73Si alloy during hot deforma- tion. The research results can be used in optimization of hot deformation parameters of A1- 0. 62Mg- 0. 73Si, and provide a theoretical basis for comprehensive studying hot deformation behavior of aluminium alloy.

关 键 词：铝合金 热变形行为 Arrhenius方程 模型评价 

分 类 号：TG319[金属学及工艺—金属压力加工]