6061铝合金高温流变行为  

Study of plastic deformation behavior on 6061 aluminum alloy

作　　者：李凤娇[1] 翟月雯[1] 边翊[1] 钟志平[1] 

机构地区：[1]北京机电研究所,北京100083

出　　处：《塑性工程学报》2015年第2期95-99,共5页Journal of Plasticity Engineering

基　　金：国家高科技研究发展技术(863计划)资助项目(2012AA040202)

摘　　要：利用Gleeble‐3500热模拟实验机，对6061铝合金在变形温度为350℃、400℃、430℃、460℃、480℃和500℃，应变速率为0.001 s－1、0.01 s－1、0.1 s－1、1 s－1和10 s－1条件下进行高温压缩实验，得到的真应力‐真应变曲线形态基本符合铝合金的热变形力学特征。采用Arrhenius双曲正弦关系描述6061铝合金的高温流变行为，确定其激活能 Q＝163.4366 kJ · mol－1；基于动态材料模型理论绘制6061铝合金热加工图，确定其最佳热加工区域温度为 T＝420℃～450℃。A set of hot compression experiment 6061 aluminum alloy was carried out on the Gleeble‐3500 thermal‐mechanical test system.The true stress‐true stain curves were obtained in the condition of temperatures 350 ℃ ,400 ℃ ,430 ℃ ,460 ℃ ,480 ℃and 500℃ ,strain rate 0.001s-1 ,0.01s-1 ,0.1s-1 ,1s-1 and 10s-1.By using the obtained experimental data ,the hot deforma‐tionactivationenergy Qis163.4366kJ·mol-1 .Theresultshowsthatunderexperimentalconditionsinthispaper ,6061alumi‐num alloy shows obvious steady rheological properties . The processing map was calculated and analyzed according to dynamic ma‐terials mode（DMM） .The processing map shows that the reasonable hot working region of 6061 aluminum alloy is T=420 ℃ ~450 ℃ .

关 键 词：压缩实验 6061铝合金 本构方程 热加工图 

分 类 号：TG113[金属学及工艺—物理冶金]