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

共 56 条

[1] On the micromechanics of void growth by prismatic-dislocation loop emission [J].

Ahn, DC ;

Sofronis, P ;

Minich, R .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2006, 54 (04) :735-755

[2] Plastic strain localization in metals: origins and consequences [J].

Antolovich, Stephen D. ;

Armstrong, Ronald W. .

PROGRESS IN MATERIALS SCIENCE, 2014, 59 :1-160

[3] High strain rate properties of metals and alloys [J].

Armstrong, R. W. ;

Walley, S. M. .

INTERNATIONAL MATERIALS REVIEWS, 2008, 53 (03) :105-128

[4] A multiscale strength model for extreme loading conditions [J].

Barton, N. R. ;

Bernier, J. V. ;

Becker, R. ;

Arsenlis, A. ;

Cavallo, R. ;

Marian, J. ;

Rhee, M. ;

Park, H. -S. ;

Remington, B. A. ;

Olson, R. T. .

JOURNAL OF APPLIED PHYSICS, 2011, 109 (07)

[5] Investigating Damage Evolution at the Nanoscale: Molecular Dynamics Simulations of Nanovoid Growth in Single-Crystal Aluminum [J].

Bhatia, M. A. ;

Solanki, K. N. ;

Moitra, A. ;

Tschopp, M. A. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2013, 44A (02) :617-626

[6] Void initiation in fcc metals: Effect of loading orientation and nanocrystalline effects [J].

Bringa, Eduardo M. ;

Traiviratana, Sirirat ;

Meyers, Marc A. .

ACTA MATERIALIA, 2010, 58 (13) :4458-4477

[7] Shock deformation of face-centred-cubic metals on subnanosecond timescales [J].

Bringa, M. ;

Rosolankova, K. ;

Rudd, R. E. ;

Remington, B. A. ;

Wark, J. S. ;

Duchaineau, M. ;

Kalantar, H. ;

Hawreliak, J. ;

Belak, J. .

NATURE MATERIALS, 2006, 5 (10) :805-809

[8] High-Pressure-High-Temperature Polymorphism in Ta: Resolving an Ongoing Experimental Controversy [J].

Burakovsky, L. ;

Chen, S. P. ;

Preston, D. L. ;

Belonoshko, A. B. ;

Rosengren, A. ;

Mikhaylushkin, A. S. ;

Simak, S. I. ;

Moriarty, J. A. .

PHYSICAL REVIEW LETTERS, 2010, 104 (25)

[9] Improvements to the ε-α porous compaction model for simulating impacts into high-porosity solar system objects [J].

Collins, G. S. ;

Melosh, H. J. ;

Wuennemann, K. .

INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 2011, 38 (06) :434-439

[10] Extended Finnis-Sinclair potential for bcc and fcc metals and alloys [J].

Dai, X. D. ;

Kong, Y. ;

Li, J. H. ;

Liu, B. X. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2006, 18 (19) :4527-4542

← 1 2 3 4 5 6 →