Slip dislocation and twin nucleation mechanisms in hcp metals

被引：53

作者：

Ostapovets, Andriy ^{[1
]}

Serra, Anna ^{[2
]}

机构：

[1] Acad Sci Czech Republ, Cent European Inst Technol, Inst Phys Mat CEITEC IPM, Zizkova 22, Brno 61662, Czech Republic

[2] Univ Politecn Cataluna, Dept Civil & Environm Engn, Jordi Girona 1-3, ES-08034 Barcelona, Spain

来源：

JOURNAL OF MATERIALS SCIENCE | 2017年 / 52卷 / 01期

关键词：

TITANIUM THIN-FILMS; TRANSMISSION ELECTRON-MICROSCOPY; COMPUTER-SIMULATION; DEFORMATION; MICROSTRUCTURE; BOUNDARIES; IMPACT; TI;

D O I：

10.1007/s10853-016-0351-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new nucleation mechanism is proposed for deformation twin in hcp materials. The mechanism is based on the results of atomistic computer simulations. It was found that under high shear stress applied on plane (the stress level is about 7 % of shear modulus), the core of a slip dislocation can transform to a twin embryo. The transformation and subsequent twin growth are accompanied by nucleation and migration of interfacial defects including disconnections and stacking faults. The paper provides the analysis of the nature of these defects and describes the reactions between them.

引用

页码：533 / 540

页数：8

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