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arXiv · 1712.09103

Power-Law Creep from Discrete Dislocation Dynamics

Shyam M. Keralavarma·Tahir Cagin·Tom Arsenlis·A. Amine Benzerga
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Abstract

We report two-dimensional discrete dislocation dynamics simulations of combined dislocation glide and climb leading to `power-law' creep in a model aluminum crystal. The approach fully accounts for matter transport due to vacancy diffusion and its coupling with dislocation motion. The existence of quasi-equilibrium or jammed states under the applied creep stresses enables observations of diffusion and climb over time scales relevant to power-law creep. The predictions for the creep rates and stress exponents fall within experimental ranges, indicating that the underlying physics is well captured.

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Shyam M. Keralavarma, Tahir Cagin, Tom Arsenlis, A. Amine Benzerga. 2017-12-25. Power-Law Creep from Discrete Dislocation Dynamics. https://doi.org/10.1103/physrevlett.109.265504

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