CAJ | 학술논문

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℃。
이용Gleeble‐3500열모의실험궤，대6061려합금재변형온도위350℃、400℃、430℃、460℃、480℃화500℃，응변속솔위0.001 s－1、0.01 s－1、0.1 s－1、1 s－1화10 s－1조건하진행고온압축실험，득도적진응력‐진응변곡선형태기본부합려합금적열변형역학특정。채용Arrhenius쌍곡정현관계묘술6061려합금적고온류변행위，학정기격활능 Q＝163.4366 kJ · mol－1；기우동태재료모형이론회제6061려합금열가공도，학정기최가열가공구역온도위 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 ℃ .