| Numéro |
J. Phys. Colloques
Volume 50, Numéro C3, Mars 1989
5th Interdisciplinary Workshop Nonlinear Coherent Structures in Physics, Mechanics and Biological Systems
|
|
|---|---|---|
| Page(s) | C3-113 - C3-114 | |
| DOI | https://doi.org/10.1051/jphyscol:1989317 | |
5th Interdisciplinary Workshop Nonlinear Coherent Structures in Physics, Mechanics and Biological Systems
J. Phys. Colloques 50 (1989) C3-113-C3-114
DOI: 10.1051/jphyscol:1989317
1 Laboratoire de Métallurgie Physique CNRS UA-131, Faculté des Sciences, 40, Avenue du Recteur Pineau, F-86022 Poitiers Cedex, France
2 CNRS-ONERA, Laboratoire d'Etude des Microstructures, 29, Avenue de la Division Leclerc, BP. 72, F-92322 Châtillon Cedex, France
J. Phys. Colloques 50 (1989) C3-113-C3-114
DOI: 10.1051/jphyscol:1989317
COMPUTER SIMULATION OF DISLOCATION PATTERNING
J. LÉPINOUX1 et L.P. KUBIN21 Laboratoire de Métallurgie Physique CNRS UA-131, Faculté des Sciences, 40, Avenue du Recteur Pineau, F-86022 Poitiers Cedex, France
2 CNRS-ONERA, Laboratoire d'Etude des Microstructures, 29, Avenue de la Division Leclerc, BP. 72, F-92322 Châtillon Cedex, France
Abstract
The dislocation structures formed in metals during monotonic or cyclic plastic straining usually build up characteristic bi- or tridimensional patterns : walls, veins, cells... Long range elastic interactions between dislocations are responsible for the occurrence of such non-uniform and organized structures. Two competing factors control these collective effects : when recovery (by cross-slip and/or climb) is effective, dense dislocation arrays tend to form stable structures which minimize their total energy. Kinetic effects, i.e. the continuous production and storage of dislocations, permanently counteract the tendency to form ordered structures through recovery.