脉冲电流对2091铝锂合金再结晶动力学的影响  

Effect of current pulse on dynamics of recrystallization in 2091 Al-Li alloy

作　　者：刘志义[1] 刘冰[2] 邓小铁 雷毅[2] 

机构地区：[1]中南大学材料科学与工程系,长沙410083 [2]石油大学机械系,东营257062

出　　处：《中国有色金属学报》2000年第6期837-842,共6页The Chinese Journal of Nonferrous Metals

基　　金：山东省自然科学基金资助项目!(0 97F0 114 7)

摘　　要：研究了脉冲电流对 2 0 91铝锂合金再结晶动力学的影响。金相观察结果表明 ,脉冲电流加速再结晶 ,并减小完全再结晶晶粒尺寸。透射电镜观察表明 ,通电试样在保温 15min的组织为几乎无晶内位错的再结晶组织 ,而未通电试样却是混乱位错的亚结构。研究表明 。The effect of current pulse on the dynamics of recrystallization in 2091 Al Li alloy has been investigated. Metallographic observation results showed that current pulse accelerates recrystallization, and decreases the size in diameter of grains fully recrystallized. TEM results showed that the microstructure in the specimen held for 15 min with concurrent pulse is recrystallized grains without interior dislocations, but that without current pulse is substructure with chaotic dislocations. It was indicated that current pulse decreases the size of grains fully recrystallized because of increasing the nucleation rate of recrystallization and decreasing the growth rate of recrystallized grains. [

关 键 词：脉冲电流 位错结构 再结晶 铝锂合金 动力学 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG111.7[金属学及工艺—金属材料]