We investigate, via three-dimensional atomistic computer simulations, phase separation in an alloy under external load. A regular two-dimensional array of cylindrical precipitates, forming a mesoscopic precipitate lattice, evolves in the case of applied tensile stress by the movement of mesoscopic lattice defects. A striking similarity to ordinary crystals is found in the movement of "meso-dislocations", but new mechanisms are also observed. Point defects such as "meso-vacancies" or "meso-interstitials" are created or annihilated locally by merging and splitting of precipitates. When the system is subjected to compressive stress, we observe stacking faults in the mesoscopic one-dimensional array of plate-like precipitates.
@article{arxiv.cond-mat/0010439,
title = {Dynamics of mesoscopic precipitate lattices in phase separating alloys under external load},
author = {R. Weinkamer and H. Gupta and P. Fratzl and J. L. Lebowitz},
journal= {arXiv preprint arXiv:cond-mat/0010439},
year = {2009}
}