文献类型：期刊文献

英文题名：Slip transmutation between basal ?a? dislocation and {11(2)over-bar1} twinning across {11(2)over-bar4} twin boundary in titanium

作者：Liu, Xingxing[1];Yin, Xunlu[1];Yang, Xiaofeng[1];Chen, Hao[1];Wang, Jian[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Univ Nebraska, Mech & Mat Engn, Lincoln, NE 68588 USA

年份：2022

卷号：221

外文期刊名：SCRIPTA MATERIALIA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000924862300003)】；

基金：This work was supported financially by the National Natural Science Foundation of China (No. 52005186) . HC acknowledges supports by Shanghai Sailing Program (20YF1409400) .

语种：英文

外文关键词：Slip transmutation; Dislocation; Twin; Molecular dynamics

摘要：Molecular dynamics simulations reveal slip transmutation mechanisms between basal < a > dislocations and {11 (2) over bar1} twinning in titanium. When a co-planar pileup of basal < a > dislocations approaches (11 (2) over bar4) coherent twin boundary (CTB), the 1st dislocation transmutes into a four-layer (11 (2) over bar1) twin in the (11 (2) over bar4) twin, forming a (11 (2) over bar4) - (11 (2) over bar1) double twin, and the 2nd and 3rd dislocations climb along the (11 (2) over bar4) CTB and then transmute into twinning dislocations, thickening the (11 (2) over bar1) secondary twin. When the (11 (2) over bar1) secondary twin propagates and encounters the other (11 (2) over bar4) CTB, a reverse transmutation happens associated with the nucleation and emission of partial dislocations.