Dislocation Multiplication by Single Cross Slip for FCC at Submicron Scales  

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作  者:CUI Yi-Nan LIU Zhan-Li ZHUANG Zhuo 崔一南;柳占立;庄茁(Applied Mechanics Laboratory,School of Aerospace,Tsinghua University,Beijing 100084)

机构地区:[1]Applied Mechanics Laboratory,School of Aerospace,Tsinghua University,Beijing 100084

出  处:《Chinese Physics Letters》2013年第4期136-140,共5页中国物理快报(英文版)

基  金:the National Natural Science Foundation of China under Grant No 11132006;the National Basic Research Program of China under Grant No 2010CB631005.

摘  要:The operation mechanism of single cross slip multiplication(SCSM)is investigated by studying the response of one dislocation loop expanding in face-centered-cubic(FCC)single crystal using three-dimensional discrete dislocation dynamic(3D-DDD)simulation.The results show that SCSM can trigger highly correlated dislocation generation in a short time,which may shed some light on understanding the large strain burst observed experimentally.Furthermore,we find that there is a critical stress and material size for the operation of SCSM,which agrees with that required to trigger large strain burst in the compression tests of FCC micropillars.

关 键 词:DISLOCATION CUBIC operation 

分 类 号:TG1[金属学及工艺—金属学]

 

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