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一种新型Al-Cu-Li系合金的高温变形软化机制

Hong-ying LI,Ling OU,Zi-qiao ZHENG,Jian-fei ZHANG

Journal of Hunan University of Science & Technology(Natural Science Edition)（2007）

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Abstract
对一种新型Al-Cu-Li系合金高温压缩变形软化机制进行了研究.结果表明:该合金在400 ℃及其以下温度变形时,以动态回复为主要软化机制,500℃变形时,除了发生动态回复外,还发生了动态再结晶;第二相粒子的存在阻碍动态回复的进行,从而有利于动态再结晶的产生,有利于合金软化;合金热变形时,高温过饱和空位促进位错作蜷线运动,使晶体得以继续滑移变形,导致合金软化.图7,参8.
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Key words
Al-Li alloy,helical dislocation,dynamic recovery,dynamic recrystallizatin
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