Multiscale Theory of Dislocation Climb - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2015

Multiscale Theory of Dislocation Climb

Résumé

Dislocation climb is a ubiquitous mechanism playing a major role in the plastic deformation of crystals at high temperature. We propose a multiscale approach to model quantitatively this mechanism at mesoscopic length and time scales. First, we analyze climb at a nanoscopic scale and derive an analytical expression of the climb rate of a jogged dislocation. Next, we deduce from this expression the activation energy of the process, bringing valuable insights to experimental studies. Finally, we show how to rigorously upscale the climb rate to a mesoscopic phase-field model of dislocation climb. This upscaling procedure opens the way to large scale simulations where climb processes are quantitatively reproduced even though the mesoscopic length scale of the simulation is orders of magnitude larger than the atomic one.
Fichier principal
Vignette du fichier
GeslinAppolaire15.pdf (398.84 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02133724 , version 1 (19-05-2019)

Identifiants

Citer

Pierre-Antoine Geslin, Benoît Appolaire, Alphonse Finel. Multiscale Theory of Dislocation Climb. Physical Review Letters, 2015, 115 (26), ⟨10.1103/PhysRevLett.115.265501⟩. ⟨hal-02133724⟩
30 Consultations
183 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More