Twinning dynamics in nanoscale body-centered cubic tungsten

被引：10

作者：

Li, Xiyao ^{[1
,2
,3
]}

Zeng, Qi ^{[4
,5
]}

Wang, Jiangwei ^{[1
,2
,3
]}

机构：

[1] Zhejiang Univ, Ctr Electron Microscopy, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

[3] Zhejiang Univ, Inst Wenzhou, Wenzhou Key Lab Novel Optoelect & Nano Mat, Wenzhou 325006, Peoples R China

[4] Zhejiang Univ, Sch Aeronaut & Astronaut, Hangzhou 310027, Peoples R China

[5] AECC Hunan Aviat Plant Res Inst, Zhuzhou 412002, Peoples R China

来源：

SCRIPTA MATERIALIA | 2022年 / 220卷

基金：

中国国家自然科学基金;

关键词：

Twinning dynamics; Zonal dislocation; Body-centered cubic; Tungsten; STACKING-FAULTS; DEFORMATION; DISLOCATION; NUCLEATION; TANTALUM; TENSILE; TWINS;

D O I：

10.1016/j.scriptamat.2022.114930

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The non-planar core structure of screw dislocations in body-centered cubic (BCC) metals strongly influences its twinning dynamics, resulting in a minimum embryo size of six-layers {112} planes and discrete three-layers thickening behavior. By considering the energetically-stable three-layers "zonal dislocation" as a unit of twinning front, we rationalize such discrete twinning behavior to the two units for twin embryo and one unit for growth, in consistent with the description of classical twinning theory.

引用

页数：4

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