Clear Band formation simulated by dislocation dynamics - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Problems of Atomic Science and Technology Année : 2009

Clear Band formation simulated by dislocation dynamics

Résumé

Dislocation Dynamics simulations of dislocations gliding across a random populations of Frank loops are presented. Specific local rules are developed to reproduce elementary interaction mechanisms obtained in Molecular Dynamics simulations. It is shown that absorption of Frank loops as helical turns on screw dislocations governs the process of clear band formation, because: (1) it transforms the loops into jogs on dislocations, (2) when the dislocations unpin, the jogs are transported along the dislocation lines, leading to a progressive clearing of the band and (3) the dislocations are re-emitted in a glide plane different from the initial one, allowing for a broadening of the band. It is also shown that a pile-up of dislocations is needed to form a clear band of finite thickness
Fichier non déposé

Dates et versions

hal-00446980 , version 1 (13-01-2010)

Identifiants

  • HAL Id : hal-00446980 , version 1

Citer

T. Nogaret, D. Rodney, M. Fivel, C. Robertson. Clear Band formation simulated by dislocation dynamics. Problems of Atomic Science and Technology, 2009, 4, pp.97-108. ⟨hal-00446980⟩
59 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More