Unravelling the nucleation and growth of {11-(2)over-bar2} twins

被引：9
|
作者：
Ostapovets, Andriy [1 ]
Verma, Ritu [1 ,2 ]
Serra, Anna [3 ]
机构：
[1] Czech Acad Sci, Inst Phys Mat, Zizkova 513-22, Brno 61600, Czech Republic
[2] Brno Univ Technol, Cent European Inst Technol, Purkynova 656-1236, Brno 61200, Czech Republic
[3] Univ Politecn Cataluna, Campus Nord,C-2,Jordi Girona 1-3, Barcelona 08034, Spain
来源：
SCRIPTA MATERIALIA | 2022年 / 215卷
关键词：
Twinning; Titanium; Phase transformation; Disconnections; Twin boundaries; TWINNING DISLOCATIONS; COMPUTER-SIMULATION; HCP METALS; DEFORMATION; DEFECTS; BOUNDARIES; TITANIUM; CRYSTALLOGRAPHY; DISCONNECTIONS; INTERFACE;
D O I：
10.1016/j.scriptamat.2022.114730
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A recently proposed mechanism of {11 <(2) over bar > 2} twin nucleation in Ti by reverse phase transformation is analysed. It is demonstrated that, not only nucleation, but also growth mechanism of an already formed twin is connected to the possibility of the phase transformation in the system, which leads to the existence of several competing structures of twin boundary. The twin growth is mediated by subsequent glide of step-like defects (disconnections) along the {1122} boundary. The twin shear is completed by gliding of pair of disconnections, which also converts twin boundary structure between two alternative variants.
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页数：5
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