Relationship between Equilibrium Fluctuations and Shear-Coupled Motion of Grain Boundaries

Karma, Alain; Trautt, Zachary T.; Mishin, Yuri

doi:10.1103/physrevlett.109.095501

Relationship between Equilibrium Fluctuations and Shear-Coupled Motion of Grain Boundaries

Journal Article · Mon Aug 27 00:00:00 EDT 2012 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.109.095501· OSTI ID:1906103

Karma, Alain ^[1]; Trautt, Zachary T. ^[2]; Mishin, Yuri ^[2]

Northeastern Univ., Boston, MA (United States); Northeastern University
George Mason Univ., Fairfax, VA (United States)

We derive general analytical expressions relating the equilibrium fluctuations of a grain boundary to key parameters governing its motion coupled to shear deformation. We validate these expressions by molecular dynamics simulations for symmetrical tilt boundaries and demonstrate how they can be used to extract the misorientation dependence of the grain-boundary mobility. Here, the results shed light on fundamental relationships between equilibrium and nonequilibrium grain-boundary properties and provide new means to predict those properties.

View Accepted Manuscript (DOE)

Research Organization:: Northeastern Univ., Boston, MA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-07ER46400; FG02-01ER45871

OSTI ID:: 1906103

Alternate ID(s):: OSTI ID: 1103197

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 109; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

Calculation of the γ / γ ′ interface free energy in the Ni–Al system by the capillary fluctuation method Mishin, Y. Modelling and Simulation in Materials Science and Engineering, Vol. 22, Issue 4 https://doi.org/10.1088/0965-0393/22/4/045001	journal	April 2014
Solute drag forces from equilibrium interface fluctuations Wang, Changjian; Upmanyu, Moneesh arXiv https://doi.org/10.48550/arxiv.2004.02394	preprint	January 2020

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