Dislocation dynamics simulations with climb: kinetics of dislocation loop coarsening controlled by bulk diffusion

Botond Bako (1) , Emmanuel Clouet (1) , Laurent Dupuy (2) , Marc Bletry (3)

1 SRMP - Service de recherches de métallurgie physique
2 SRMA - Service des Recherches Métallurgiques Appliquées
3 ICMPE - Institut de Chimie et des Matériaux Paris-Est

Dislocation climb mobilities, assuming vacancy bulk diffusion, are derived and implemented in dislocation dynamics simulations to study the coarsening of vacancy prismatic loops in fcc metals. When loops cannot glide, the comparison of the simulations with a coarsening model based on the line tension approximation shows a good agreement. Dislocation dynamics simulations with both glide and climb are then performed. Allowing for glide of the loops along their prismatic cylinders leads to faster coarsening kinetics, as direct coalescence of the loops is now possible.

Mots clés: Physical Sciences

Domaines: Matière Condensée [cond-mat]

Botond Bako, Emmanuel Clouet, Laurent Dupuy, Marc Bletry. Dislocation dynamics simulations with climb: kinetics of dislocation loop coarsening controlled by bulk diffusion. Philosophical Magazine, 2011, ⟨10.1080/14786435.2011.573815⟩. ⟨hal-00691332⟩