%0 Journal Article
%T EFFFECT OF CURRENT PULSE ON SUPERPLASTICITY AND FRACTURE BEHAVIOUR OF 2091 Al-Li ALLOY<br>脉冲电流对2091Al—Li合金超塑性及断裂行为的影响
%A LIU Zhiyi
%A CUI Jianzhong
%A BAI Guangrun Northeast University of Technology
%A Shenyang
%A <br>刘志义
%A 崔建忠
%A 白光润
%J 金属学报
%D 1993
%I 
%X Effects of current pulse on mechanical behaviors and fracture mechanism of 2091 Al-Li superplastically deformed at high strain rate have been investigated. Applying a direct current pulse makes the 2091 Al-Li alloy still with high stress-strain rate sensiitivity exponent and superplastic properties under superplastically deformed at high strain rate of 10~(-2)s~(-1). SEM observation showed that the fracture for 2091 Al-Li alloy, superplastically de- formed at high strain rate by applying current pulse, transforms from intergranular tear to typical superplastic failure, i. e., fracture by formation and coalescene of cavities at particles and boundaries.
%K current pulse
%K superplasticity
%K fracture
%K Al-Li alloy<br>超塑性
%K 断裂
%K 铝锂合金
%K 脉冲电流
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5b3ab970f71a803deacdc0559115bfcf0a068cd97dd29835&cid=ab188d3b70b071c57eb64e395d864ece&jid=b061e1135f1cbdee96cd96c109fead65&aid=9d6a0706ecc1073304128fa5ed98640c&yid=d418fdc97f7c2eba&vid=771469d9d58c34ff&iid=0b39a22176ce99fb&sid=2001e0d53b7b80ec&eid=1ae5323881a5ecdc&journal_id=0412-1961&journal_name=金属学报&referenced_num=1&reference_num=1