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- W2070185001 abstract "A complete micromechanics-based model is here proposed using the concepts of continuum kinematics and thermodynamics. A new constitutive framework is proposed to describe stress-induced “shear-coupled” grain boundary (GB) migration. Like non diffusive phase-transformations, shear-coupled GB migration can be considered on the thermodynamics point of view of conservative nature until high temperature with respect to melting point (i.e., diffusionless but thermally activated). The micromechanics-based continuum model can include intra-crystalline slip, GB sliding and shear-coupled GB migration as additive dissipative mechanisms. To illustrate the present theory, the model is applied to shear-coupled GB migration in the case of three “flat” Cu bi-crystals [0 01˙] with symmetric tilt GB (STGB): Σ17(410) (θ=28.07°), Σ5(210) (θ=53.13°), Σ41(540) (θ=77.32°). Molecular dynamics (MD) simulations under simple shear loading are first performed to identify the active shear coupling modes, the stick–slip behavior at 0 K and 500 K and the bicrystal finite size dependence on the shear stress responses. The results of the micromechanical model are discussed in comparison with MD simulations. The effects of anisotropic vs. isotropic elastic properties on effective elastic shear moduli, overall shear stress drop magnitudes and dissipated energy during GB migration are analyzed for these STGB." @default.
- W2070185001 created "2016-06-24" @default.
- W2070185001 creator A5015931646 @default.
- W2070185001 creator A5072414004 @default.
- W2070185001 creator A5072494334 @default.
- W2070185001 date "2013-05-01" @default.
- W2070185001 modified "2023-10-13" @default.
- W2070185001 title "A micromechanics-based model for shear-coupled grain boundary migration in bicrystals" @default.
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- W2070185001 doi "https://doi.org/10.1016/j.ijplas.2012.11.011" @default.
- W2070185001 hasPublicationYear "2013" @default.
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