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A molecular dynamics-informed probabilistic cross-slip model in discrete dislocation dynamics

Abstract : We present here a quantitative study of dislocation cross-slip, an essential thermally activated process in deformation of metals, in discrete dislocation dynamics (DDD) simulations. We implemented a stress-dependent line-tension model in DDD simulations, with minimal information from molecular dynamics (MD) simulations. This model allows reproducing in DDD simulations the probabilistic cross-slip rate calculated in MD simulations for Cu in a large range of stresses and temperatures. This model opens new horizons in modelling cross-slip related mechanisms such as deformation softening, dislocation-precipitate interaction and dislocation patterning in realistic strain rates. Abstract We present here a quantitative study of dislocation cross-slip, an essential thermally
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https://hal-cnrs.archives-ouvertes.fr/hal-02922568
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Submitted on : Wednesday, August 26, 2020 - 12:17:40 PM
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Alon Malka-Markovitz, Benoit Devincre, Dan Mordehai. A molecular dynamics-informed probabilistic cross-slip model in discrete dislocation dynamics. Scripta Materialia, Elsevier, 2021, 190, pp.7-11. ⟨10.1016/j.scriptamat.2020.08.008⟩. ⟨hal-02922568⟩

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