%0 Journal Article
%T Dislocation Pattern in Deformation Band and Crack Nucleation in a Fatigued Copper Bicrystal with Perpendicular Grain Boundary<br>疲劳过程中垂直晶界Cu双晶形变带中位错组态与裂纹形核
%A LI Yong
%A LI Shouxin
%A LI Guangyi
%A <br>李勇
%A 李守新
%A 李广义
%J 金属学报
%D 2004
%I 
%X The dislocation pattern evolution and crack nucleation in a fatigued copper bicrystal with perpendicular grain boundary (GB) have been investigated by electron channelling contrast (ECC) technique in SEM. The observation results show that in the process from the formation of deformation band (DB) to the appearance of fatigued crack, the spacing between the wall structures in DB keeps constant. The dislocation pattern around the crack tips of transgranular and granular Presents misorientation cell structure The crack preferentially form in DB
%K copper bicrystal
%K dislocation pattern
%K crack
%K deformation band<br>Cu双晶
%K 位错组态
%K 裂纹
%K 形变带
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=D427F6CEC1133854&yid=D0E58B75BFD8E51C&vid=1371F55DA51B6E64&iid=94C357A881DFC066&sid=8C5DE51F0A009A0F&eid=4D4C81DBA842B7BD&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=42