Equation of Motion for a Grain Boundary

Zhang, Luchan; Han, Jian; Xiang, Yang; Srolovitz, David J.

doi:10.1103/physrevlett.119.246101

Title: Equation of Motion for a Grain Boundary

Journal Article · Tue Dec 12 00:00:00 EST 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.119.246101· OSTI ID:1541258

Zhang, Luchan ^[1]; Han, Jian ^[2]; Xiang, Yang ^[3]; Srolovitz, David J. ^[4]

Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering; The Hong Kong Univ. of Science and Technology (Hong Kong). Dept. of Mathematics
Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering
The Hong Kong Univ. of Science and Technology (Hong Kong). Dept. of Mathematics
Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Materials Science and Engineering. Dept. of Mechanical Engineering and Applied Mechanics; The Hong Kong Univ. of Science and Technology (Hong Kong). Inst. for Advanced Study

Grain boundary (GB) migration controls many forms of microstructural evolution in polycrystalline materials. Recent theory, simulations, and experiments demonstrate that GB migration is controlled by the motion of discrete line defects or disconnections. We present a continuum equation of motion for grain boundary derived from the underlying discrete disconnection mechanism. We also present an equation of motion for the junctions where multiple grain boundaries meet—as is always the case in a polycrystal. The resulting equation of motion naturally exhibits junction drag—a widely observed phenomena in junction dynamics in solids and liquids.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Complex Materials from First Principles (CCM); Temple Univ., Philadelphia, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012575

OSTI ID:: 1541258

Alternate ID(s):: OSTI ID: 1413029

Journal Information:: Physical Review Letters, Vol. 119, Issue 24; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 48 works

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Cited By (3)

Simulations of grain boundaries between ordered hard sphere monolayer domains: Orientation-dependent stiffness and its correlation with grain coarsening dynamics Kindt, James T. The Journal of Chemical Physics, Vol. 149, Issue 4 https://doi.org/10.1063/1.5029813	journal	July 2018
Competing factors in grain boundary loop shrinkage: Two-dimensional hard sphere colloidal crystals Kindt, James T. The Journal of Chemical Physics, Vol. 151, Issue 8 https://doi.org/10.1063/1.5110394	journal	August 2019
Disconnection description of triple-junction motion Thomas, Spencer L.; Wei, Chaozhen; Han, Jian Proceedings of the National Academy of Sciences, Vol. 116, Issue 18 https://doi.org/10.1073/pnas.1820789116	journal	April 2019

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