COMPUTER SIMULATION OF DISLOCATION PATTERNING

J. Lépinoux , L. Kubin

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.

Domaines: Articles anciens

J. Lépinoux, L. Kubin. COMPUTER SIMULATION OF DISLOCATION PATTERNING. Journal de Physique Colloques, 1989, 50 (C3), pp.C3-113-C3-114. ⟨10.1051/jphyscol:1989317⟩. ⟨jpa-00229458⟩