3D discrete dislocation modelling of high temperature plasticity

被引:4
作者
Zalezak, Tomas [1 ]
Dlouhy, Antonin [1 ]
机构
[1] Acad Sci Czech Republic, Inst Phys Mat, Brno 61662, Czech Republic
来源
MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE | 2011年 / 465卷
关键词
Discrete dislocation dynamics (DDD); high temperature deformation; meso-scale simulations of plasticity; diffusion;
D O I
10.4028/www.scientific.net/KEM.465.115
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
A 3D model is presented that addresses an evolution of flexible dislocation lines at hightemperatures. The model is based on the linear theory of elasticity. A smooth dislocation line is approximated by a piecewise curve composed of short straight dislocation segments. Each dislocation segment is acted upon by a Peach-Koehler force due to a local stress field. All segment-segment interactions as well as an externally applied stress are considered. A segment mobility is proportional to the Peach-Koehler force, temperature-dependent factors control climb and glide motion of the segments. The potential of the model is demonstrated in simulations of simple high temperature processes including interactions of dislocations with secondary particles.
引用
收藏
页码:115 / 118
页数:4
相关论文
共 6 条
[1]  
Bulatov V.V., 2006, Computer Simulations of Dislocations
[2]   A non-singular continuum theory of dislocations [J].
Cai, W ;
Arsenlis, A ;
Weinberger, CR ;
Bulatov, VV .
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2006, 54 (03) :561-587
[3]  
Hirth P., 1992, Theory of Dislocations, V2nd
[4]   Introducing dislocation climb by bulk diffusion in discrete dislocation dynamics [J].
Mordehai, Dan ;
Clouet, Emmanuel ;
Fivel, Marc ;
Verdier, Marc .
PHILOSOPHICAL MAGAZINE, 2008, 88 (06) :899-925
[5]   The Peierls dislocation: Line energy, line tension, dissociation and deviation [J].
Schoeck, G .
ACTA MATERIALIA, 1997, 45 (06) :2597-2605
[6]   Discrete dislocation modeling in three-dimensional confined volumes [J].
Weygand, D ;
Friedman, LH ;
van der Giessen, E ;
Needleman, A .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 309 :420-424