A lattice-based micromechanical continuum formulation for stress-driven mass transport in polycrystalline solids

摘要

This work represents a first step toward the development of a continuum field formulation for the coupled phenomena of diffusion and mechanics in polycrystalline solids. The basis of the for- mulation lies in lattice-level mechanisms, from which a continuum thermodynamic description of processes at micron length scales is developed. Considering self-diffusion, the composition problem is posed in terms of a binary vacancy-atom mixture.