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

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

2011-06-28

arxiv.org/abs/1106.5610v1

Philosophical Magazine 91, 23 (2011) 3173-3191

Physics

Condensed Matter

Materials Science

Scientific paper

10.1080/14786435.2011.573815

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.

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