电场时效对2014铝合金θ(Al2Cu)析出相的影响  

Effects of electric field aging on the precipitation of θ(Al_2Cu) phase in 2014 aluminum alloy

作　　者：肖伯涛[1,2] 何长树[1] 宫明龙[1] 赵骧[1] 

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110004 [2]南昌理工学院光信息机电工程系,330013

出　　处：《中国科技论文在线》2009年第4期243-247,共5页

基　　金：高等学校博士学科点专项科研基金(20050145030)

摘　　要：借助TEM研究了在170℃条件下进行6、8、10和12h电场时效对2014铝合金析出行为的影响。结果表明:电场时效能够有效地减小2014铝合金中的析出相θ(Al2Cu)的尺寸,且使其弥散分布;尤其是在时效时间为12h的时候,其效果更加显著,此时析出相θ(Al2Cu)细小弥散程度随着电场强度的增强而显著提高。这主要是由于电场时效改变了析出相的形核与长大所致。Effects of the electric field aging at 170 ℃ for 6,8,10 and 12 h on precipitation behaviors of 2014 aluminum alloy were investigated by transmission electron microscope（TEM）.The results show that electric field can reduce the size of the precipitation phase θ（Al2Cu） and increase the dispersion of the fine precipitations.Especially,this kinds of effect is very evident when the aging time is 12 h,the dispersion degree of the fine precipitations is increased with increasing the intensity of electric field.This is because that the nucleation and growth of the precipitation phase θ（Al2Cu） are changed by the electric field aging.

关 键 词：金属材料 析出相 电场时效 2014铝合金 

分 类 号：TG166.3[金属学及工艺—热处理]