%0 Journal Article
%T Micro-mechanisms of fatigue damage in copper crystals<br>铜晶体的疲劳损伤微观机制
%A ZHANG Zhefeng
%A DUAN Qiqiang
%A WANG Zhongguang
%A <br>张哲峰
%A 段启强
%A 王中光
%J 金属学报
%D 2005
%I 
%X Micro-mechanisms of fatigue damage in copper single-, bi- and poly- crystals were summarized in the present paper. A number of investigations reveal that fatigue crack mainly initiates along persistent slip bands (PSBs) in copper single crystals at low or medium strain range, however, nucleates along coarse deformation bands (DBs) at high strain range. For copper bi-crystals, various large-angle grain boundaries (GBs) are always the preferential sites for the nucleation and propagation of fatigue cracks while the low-angle GBs do not lead to fatigue cracking during fatigue. Fatigue cracks mainly nucleated along large-angle GBs, sometimes along PSBs in polycrystalline copper, however, the initiation of fatigue crack at twin boundaries (TBs) was not observed due to the compatible slip deformation across the TBs.
%K copper crystal
%K fatigue crack
%K persistent slip band (PSB)
%K deformation band (DB)
%K grain boundary (GB)<br>Cu晶体
%K 疲劳裂纹
%K 驻留滑移带
%K 形变带
%K 晶界
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=7E881203277C9CCE&yid=2DD7160C83D0ACED&vid=2001E0D53B7B80EC&iid=708DD6B15D2464E8&sid=CF89D3C02791C82E&eid=1529CB0C2A6A7E90&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=35