基于修正J-C本构模型的固溶态7050铝合金中温变形行为研究  

Study on middle temperature deformation behavior of solid-solution 7050 aluminum alloy based on modified J-C constitutive model

作　　者：黎燕 潘成海[3] 滕海灏 王敬 梁强 Li Yan;Pan Chenghai;Teng Haihao;Wang Jing;Liang Qiang(College of Mechanical Engineering,Chongqing Technology and Business University,Chongqing 400067,China;Engineering Training Center,Chongqing Technology and Business University,Chongqing 400067,China;College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆工商大学机械工程学院,重庆400067 [2]重庆工商大学工程训练中心,重庆400067 [3]重庆大学材料科学与工程学院,重庆400044

出　　处：《锻压技术》2024年第6期221-226,共6页Forging & Stamping Technology

基　　金：重庆工商大学教改项目(2022145)。

摘　　要：为研究固溶态7050铝合金的中温变形行为,在变形温度为333~523K、应变速率为0.001~0.1s^(-1)的条件下进行了中温压缩实验,构建了一种考虑温度和应变速率的修正J-C本构模型。结果表明:在所研究的条件下,当应变在0.1以下时,应力随着应变的增加而增加;当应变在0.1以上时,应力趋于平稳状态。固溶态7050铝合金的温度软化效应显著。对比真实应力-真实应变数据与经典J-C本构模型预测数据、修正J-C本构模型预测数据发现,修正J-C本构模型预测数据与真实应力-真实应变数据的误差在±5%以内,表明修正J-C本构模型具有较高的预测精度和扩展性,可准确地描述固溶态7050铝合金在中温阶段的流动应力特性。In order to study the middle temperature deformation behavior of solid-solution 7050 aluminum alloy,the middle temperature com-pression experiments were conducted at the deformation temperature of 333-523 K,the strain rate of 0.001-0.1 s^(-1)and a modified J-C constitutive model considering temperature and strain rate was established.The results show that under the studied conditions,the stress in-creases with the increasing of strain when the strain is below 0.1,and tends to be stable when the strain is above 0.1.The temperature sof-tening effect of solid-solution 7050 aluminum alloy is significant.Comparing the data of true stress-true strain with the predicted data of clas-sical J-C constitutive model and modified J-C constitutive model,it is find that the deviation between the data predicted by modified J-C con-stitutive model and the true stress-true strain data is within±5%,indicating that the modified J-C constitutive model has high precision and expansi-bility.Thus,this model can accurately describe the flow stress characteristics of solid-solution 7050 aluminum alloy in the middle temperature stage.

关 键 词：固溶态7050铝合金 J-C本构模型 中温变形行为 应力 应变 

分 类 号：TG166.3[金属学及工艺—热处理]