变形态2219铝合金高温塑性变形的本构模型  

A constitutive model of high temperature plastic deformation of 2219 aluminum alloy for ring

作　　者：王清松 徐戊矫[2] 吴道祥 何珞玉 谢丹[2] Wang Qingsong;Xu Wujiao;Wu Daoxiang;He Luoyu;Xie Dan(Southwest Aluminum(Group)Co.,Ltd.,Chongqing 401326;Chongqing University,Chongqing 400040,China)

机构地区：[1]西南铝业(集团)有限责任公司,重庆401326 [2]重庆大学,重庆400040

出　　处：《铝加工》2021年第3期27-31,共5页Aluminium Fabrication

基　　金：重庆市技术创新与应用示范专项产业类重点研发项目(cstc2018jszx-cyzdX0094)。

摘　　要：采用Gleeble-3500型热压缩试验机研究了变形态2219铝合金在应变速率为0.25~0.8 s^(-1)、变形温度为420~500℃时的流变应力行为,建立了变形态2219铝合金高温塑性变形时的基于应变补偿的双曲正弦本构方程。结果表明:变形态2219铝合金的流变应力随变形温度的升高而降低,随应变速率的提高而增大。基于应变补偿的本构模型能更好地预测变形态2219铝合金的高温流变行为,实验值与预测值的平均相对误差为4.56%。Using the Gleeble-3500 hot compression testing machine,the flow stress behavior of deformed 2219 aluminum alloy at a strain rate of 0.25~0.8 s^(-1) and a deformation temperature of 420~500℃was studied,and the high temperature plastic deformation of deformed 2219 aluminum alloy was established.The hyperbolic sinusoidal constitutive equation was based on strain compensation.The results show that the flow stress of deformed 2219 aluminum alloy decreases with the increase of deformation temperature and increases with the increase of strain rate;the constitutive model based on strain compensation can better predict the high temperature rheological behavior of deformed 2219,and the average relative error between the experimental value and the predicted value is 4.56%.

关 键 词：变形态2219铝合金 高温塑性 流动应力 本构模型 应变补偿 

分 类 号：TG339[金属学及工艺—金属压力加工]