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.
@article{arxiv.1712.09103,
title = {Power-Law Creep from Discrete Dislocation Dynamics},
author = {Shyam M. Keralavarma and Tahir Cagin and Tom Arsenlis and A. Amine Benzerga},
journal= {arXiv preprint arXiv:1712.09103},
year = {2017}
}