Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第6卷    第3期    总第20期    1996年9月

[PDF全文下载]        

    

文章编号:(1996)03-158-3
2091铝锂合金变形断裂过程的原位观察
陈小群1 尹志民2

(1.中南工业大学测试中心,
2.中南工业大学材料科学与工程系,长沙410083
)

摘 要: 利用透射电镜对2091铝锂合金在不同热处理状态下的变形断裂过程进行了原位观察,结果表明,在不同的时效状态,合金的应变局部化不同,在近峰值时效合金变形时,位错切割δ相而产生强的共面滑移,引起应变不均匀;而在过时效态合金中,应变集中于晶界PFZ内,晶内的共面滑移带明显减弱。

 

关键字: 铝锂合金 变形断裂机制 原位观察

IN SITU OBSERVATION OF DEFORMATION AND
FRACTURE IN2091Al-Li ALLOY
Chen Xiaoqun1, Yin Zhimin2

1Test and Analysis Center,
2Department of Materials Science and Engineering,
Central South University of Technology, Changsha 410083

Abstract:The processes of deformation and fracture in a 2091 Al-Li alloy under various heat treatment conditions were investigated in situ by transmission electron microscopy. In near-peak aged alloy, the shearable nature of theδ′precipitates tends to localize the strain in intense deformation bands. On the other hand, in over-aged alloy, the presence of wide PFZs with copious grain boundary precipitates stimulates localized deformation in the PFZs, and the planar slip bands
are obviously weakened.

 

Key words: Al-Li alloy deformation fracture in situ observation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com