%0 Journal Article
%T Preliminary Time Series Analysis of Serrated Yielding in Al-4%Cu Alloy<br>Al-4%Cu多晶合金中锯齿形屈服现象的初步时序分析
%A Lu Junyong
%A Jiang Zhenyu
%A Zhang Qingchuan
%A <br>卢俊勇
%A 蒋震宇
%A 张青川
%J 金属学报
%D 2006
%I 
%X A systematic statistical analysis of the characteristics of the Portevin-Le Chartelier (PLC) effect in Al-4%Cu alloy, including the stress drop amplitude and the reloading time, etc., is carried out. The drop duration is found to be a constant independent of the strain. The average stress drop amplitude and the average reloading time of 1 and 2 mm thick samples increase with strain linearly, while the cases of 3 mm thick samples are much more complicated. The evidence of self-organized criticality is demonstrated, and the nonlinear mechanism in the PLC effect is also explained by comparing with the classic sand-pile model, and by combining with the dynamic strain aging (DSA) principle and the dislocation dynamics.
%K Al-Cu alloy
%K serrated yielding
%K statistical analysis
%K self-organized criticality<br>Al-Cu合金
%K 锯齿形屈服效应
%K 统计分析
%K 自组织临界性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=3A6C4CFA5F1F3F8D&yid=37904DC365DD7266&vid=ECE8E54D6034F642&iid=B31275AF3241DB2D&sid=FED67FBA0A707330&eid=54E527C5B72E59D8&journal_id=0412-1961&journal_name=金属学报&referenced_num=1&reference_num=42