Disconnection-mediated migration of interfaces in microstructures: I. continuum model

Research output: Contribution to journalResearch articleContributedpeer-review



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.


Original languageEnglish
Article number117178
JournalActa materialia
Publication statusPublished - Apr 2022

External IDs

Scopus 85112837362
WOS 000789652100007
Mendeley a90c7390-20ad-38ec-b7f3-735c1e226350


DFG Classification of Subject Areas according to Review Boards


  • Continuum modeling, Disconnections, Grain boundaries, Interfaces, Microstructure

Library keywords