Orientation-dependent response of defective Tantalum single crystals

被引：17

作者：

Tramontina, Diego ^{[1
,2
,3
]}

Ruestes, Carlos ^{[1
,2
]}

Tang, Yizhe ^{[4
]}

Bringa, Eduardo ^{[2
,5
]}

机构：

[1] Agcy Nacl Promoc Cient & Tecnol, CABA, Buenos Aires, DF, Argentina

[2] Univ Nacl Cuyo, Inst Ciencias Basicas, RA-5500 Mendoza, Argentina

[3] Univ Mendoza, Inst Bioingn, RA-5500 Mendoza, Argentina

[4] Johns Hopkins Univ, Baltimore, MD 21218 USA

[5] Consejo Nacl Invest Cient & Tecn, CABA, Buenos Aires, DF, Argentina

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2014年 / 90卷

关键词：

Molecular dynamics; Tantalum; Plasticity; Nanovoids; VOID GROWTH; DYNAMIC FRACTURE; NANOVOID GROWTH; HIGH-STRAIN; FCC METALS; DISLOCATIONS; DEFORMATION; NUCLEATION; INITIATION; CONTINUUM;

D O I：

10.1016/j.commatsci.2014.03.069

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Defective Tantalum monocrystals are expected to display a particularly rich behavior when stressed along different directions. Using molecular dynamics simulations, we model Ta monocrystals containing a single spherical void of different sizes, under uniaxial compression, for two empirical potentials. Differences on the yield point, dislocation generation and plastic heating are observed depending on the void size and stress direction, as distinct slip systems are activated, resulting in a variety of dislocation structures and mobilities. (C) 2014 Elsevier B. V. All rights reserved.

引用

页码：82 / 88

页数：7

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