%0 Journal Article
%T IN SITU TEM OBSERVATION OF EMBRITTLEMENT OF ALUMINUM ALLOY BY LIQUID METAL<br>铝合金液体金属脆断过程的TEM原位观察
%A LIU Xiaomin
%A SU Yanjing
%A HUANG Yizhong
%A CHU Wuyang
%A <br>刘晓敏
%A 宿彦京
%A 黄一中
%A 褚武扬
%J 金属学报
%D 1998
%I 
%X The liquid metal-induced embrittlement (LME) of 7075 aluminum alloy was investigated by using a special constant deflection device. The change in dislocation configuration ahead of a loaded crack tip for 7075 aluminum alloy before and after adsorping of Hg 3%Ga atoms, and the initiation of liquid metal-induced microcrack have been observed in TEM. The results showed that chemisorption of liquid metal atoms could facilitate dislocation emission,multiplication and motioll. When the chemisorption - facilitating dislocation emission and motionreach to a critical condition, a microcrack will initiate in dislocation free zone (DFZ) or at the crack tip, and propagate in cleavage mode.
%K 7075 aluminum alloy
%K liquid metal-induced embrittlement (LME)
%K dislocation emission
%K dislocation motion
%K TEM<br>铝合金
%K 液体金属
%K 脆断
%K 位错发射
%K 位错运动
%K TEM
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=ECDC9ECCF881A3E30273F3682185D5F9&yid=8CAA3A429E3EA654&vid=339D79302DF62549&iid=F3090AE9B60B7ED1&sid=5D5B6851F9BAEE73&eid=4E3F821C82005C21&journal_id=0412-1961&journal_name=金属学报&referenced_num=3&reference_num=1