Dislocation climb in two-dimensional discrete dislocation dynamics

被引：56

作者：

Davoudi, Kamyar M. ^{[1
]}

Nicola, Lucia ^{[2
]}

Vlassak, Joost J. ^{[1
]}

机构：

[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 10期

基金：

美国国家科学基金会;

关键词：

FREESTANDING THIN-FILMS; PLASTIC-DEFORMATION; BULK DIFFUSION; SIMULATIONS; CREEP; CRYSTALS; STRENGTH; STRESS; LENGTH;

D O I：

10.1063/1.4718432

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, dislocation climb is incorporated in a two-dimensional discrete dislocation dynamics model. Calculations are carried out for polycrystalline thin films, passivated on one or both surfaces. Climb allows dislocations to escape from dislocation pile-ups and reduces the strain-hardening rate, especially for fully passivated films. Within the framework of this model, climb modifies the dislocation structures that develop during plastic deformation and results in the formation of pile-ups on slip planes that do not contain any dislocation sources. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718432]

引用

页数：7

共 52 条

[1] Enabling strain hardening simulations with dislocation dynamics [J].

Arsenlis, A. ;

Cai, W. ;

Tang, M. ;

Rhee, M. ;

Oppelstrup, T. ;

Hommes, G. ;

Pierce, T. G. ;

Bulatov, V. V. .

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 2007, 15 (06) :553-595

[2] Dislocation dynamics simulations of the relaxation of intrinsic stress in thin films [J].

Ayas, C. ;

Van der Giesen, E. .

PHILOSOPHICAL MAGAZINE, 2008, 88 (30-32) :3461-3477

[3] Dislocation glasses:: Aging during relaxation and coarsening [J].

Bako, B. ;

Groma, I. ;

Gyorgyi, G. ;

Zimanyi, G. T. .

PHYSICAL REVIEW LETTERS, 2007, 98 (07)

[4] Dislocation patterning:: The role of climb in meso-scale simulations [J].

Bako, B. ;

Groma, I. ;

Gyorgyi, G. ;

Zimanyi, G. .

COMPUTATIONAL MATERIALS SCIENCE, 2006, 38 (01) :22-28

[5] Dislocation dynamics simulations with climb: kinetics of dislocation loop coarsening controlled by bulk diffusion [J].

Bako, Botond ;

Clouet, Emmanuel ;

Dupuy, Laurent M. ;

Bletry, Marc .

PHILOSOPHICAL MAGAZINE, 2011, 91 (23) :3173-3191

[6] Cellular dislocation patterning during plastic deformation [J].

Bako, Botond ;

Hoffelner, Wolfgang .

PHYSICAL REVIEW B, 2007, 76 (21)

[7] Discrete dislocation plasticity analysis of the grain size dependence of the flow strength of polycrystals [J].

Balint, D. S. ;

Deshpande, V. S. ;

Needleman, A. ;

Van der Giessen, E. .

INTERNATIONAL JOURNAL OF PLASTICITY, 2008, 24 (12) :2149-2172

[8]

Balluffi R.W., 1979, Dislocation in Solids, V4, P1

[9] Incorporating three-dimensional mechanisms into two-dimensional dislocation dynamics [J].

Benzerga, AA ;

Bréchet, Y ;

Needleman, A ;

Van der Giessen, E .

MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 2004, 12 (01) :159-196

[10] Dislocation multi-junctions and strain hardening [J].

Bulatov, VV ;

Hsiung, LL ;

Tang, M ;

Arsenlis, A ;

Bartelt, MC ;

Cai, W ;

Florando, JN ;

Hiratani, M ;

Rhee, M ;

Hommes, G ;

Pierce, TG ;

de la Rubia, TD .

NATURE, 2006, 440 (7088) :1174-1178

← 1 2 3 4 5 6 →