Disconnection-Mediated Migration of Interfaces in Microstructures: I. continuum model
Abstract
A long-standing goal of materials science is to understand, predict and control the evolution of microstructures in crystalline materials. Most microstructure evolution is controlled by interface motion; hence, the establishment of rigorous interface equations of motion is a universal goal of materials science. We present a new model for the motion of arbitrarily curved interfaces that respects the underlying crystallography of the two phases/domains meeting at the interface and is consistent with microscopic mechanisms of interface motion; i.e., disconnection migration (line defects in the interface with step and dislocation character). We derive the equation of motion for interface migration under the influence of a wide range of driving forces. In Part II of this paper [Salvalaglio, Han and Srolovitz, 2021], we implement the interface model and the equation of motion proposed in this paper in a diffuse interface simulation approach for complex morphology and microstructure evolution.
Cite
@article{arxiv.2103.09688,
title = {Disconnection-Mediated Migration of Interfaces in Microstructures: I. continuum model},
author = {Jian Han and David J. Srolovitz and Marco Salvalaglio},
journal= {arXiv preprint arXiv:2103.09688},
year = {2022}
}
Comments
15 pages, 12 figures, supplementary material (5 pages, 3 figures) enclosed