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Search Publications by: Yuri Mishin (Fed)

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Displaying 1 - 9 of 9

Coupling Grain Boundary Motion to Shear Deformation

October 12, 2021
Author(s)
Yuri Mishin, A Suzuki, John W. Cahn
Molecular dynamics (MD) simulations confirm that normal grain boundary (GB) motion must often be coupled to tangential translation of grains and will then produce shear deformation of the lattice traversed by the GB. Conversely, shear stresses applied to a

Vacancy Dissociation in BCC Screw Dislocation Cores

July 1, 2017
Author(s)
Lucas M. Hale, Yuri Mishin, Chandler A. Becker
The interaction between screw dislocations and vacancies in body-centered cubic metals is investigated using molecular dynamics simulations. For thirteen different classical interatomic potentials, materials properties relating to vacancies, dislocations

Duality of Dislocation Content of Grain Boundaries

February 19, 2017
Author(s)
John W. Cahn, Yuri Mishin, A Suzuki
The Frank-Bilby equation (FBE) can give many solutions for the dislocation content of a grain boundary (GB); most of them are considered to have little physical reality except in limited ranges of the angles which characterize low-angle GBs. We explore two

Thermodynamics of Cottrell atmospheres tested by atomistic simulations

September 15, 2016
Author(s)
Yuri Mishin, John W. Cahn
Solute atoms can segregate to elastically deformed lattice regions around a dislocation and form an equilibrium distribution called the Cottrell atmosphere. We compare two approaches to describe Cottrell atmospheres. In the Eshelby theory, the solid

Sharp interface model of creep deformation in crystalline solids

June 30, 2015
Author(s)
Yuri Mishin, Geoffrey B. McFadden, Robert F. Sekerka, William J. Boettinger
We present a rigorous irreversible thermodynamics treatment of creep deformation of solid mate- rials with interfaces described as geometric surfaces capable of vacancy generation and absorption and moving under the influence of local thermodynamic forces

Irreversible thermodynamics of creep in crystalline solids

November 15, 2013
Author(s)
Yuri Mishin, James A. Warren, Robert F. Sekerka, William J. Boettinger
We develop an irreversible thermodynamics framework for the description of creep deformation in crystalline solids by mechanisms that involve vacancy diffusion and lattice site generation and annihilation. The material undergoing the creep deformation is

Thermodynamic model of hydride formation and dissolution in spherical particles

June 30, 2010
Author(s)
Yuri Mishin, William J. Boettinger
A model of hydride formation and dissolution has been proposed for a single spherical nano-particle and for a colletion of such particles with a given size distribution. The phase transformation strain gives rise to an elastic barrier of the transformation