Predicting dislocation climb: Classical modeling versus atomistic simulations

Emmanuel Clouet (1)

1 SRMP - Service de recherches de métallurgie physique

The classical modeling of dislocation climb based on a continuous description of vacancy diffusion is compared to recent atomistic simulations of dislocation climb in body-centered cubic iron under vacancy supersaturation [Phys. Rev. Lett. 105 095501 (2010)]. A quantitative agreement is obtained, showing the ability of the classical approach to describe dislocation climb. The analytical model is then used to extrapolate dislocation climb velocities to lower dislocation densities, in the range corresponding to experiments. This allows testing of the validity of the pure climb creep model proposed by Kabir et al. [Phys. Rev. Lett. 105 095501 (2010)].

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Emmanuel Clouet. Predicting dislocation climb: Classical modeling versus atomistic simulations. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84 (9), pp.092106. ⟨10.1103/PhysRevB.84.092106⟩. ⟨hal-00625865⟩