Plastic relaxation during diffusion-controlled growth of Widmanstätten plates

[Display omitted] A phase field model accounting for anisotropic elasticity as well as isotropic strain gradient viscoplasticity is employed to study the diffusion-controlled growth of acicular precipitates. Following some recent work (Cottura et al., 2014), it is shown that an anisotropic eigenstra...

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Veröffentlicht in:	Scripta materialia 2015-11, Vol.108, p.117-121
Hauptverfasser:	Cottura, Maeva, Appolaire, Benoît, Finel, Alphonse, Le Bouar, Yann
Format:	Artikel
Sprache:	eng
Schlagworte:	Elasticity Mechanics Mechanics of materials Phase field modeling Phase transformations Physics Plasticity Widmanstätten
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creator	Cottura, Maeva Appolaire, Benoît Finel, Alphonse Le Bouar, Yann
description	[Display omitted] A phase field model accounting for anisotropic elasticity as well as isotropic strain gradient viscoplasticity is employed to study the diffusion-controlled growth of acicular precipitates. Following some recent work (Cottura et al., 2014), it is shown that an anisotropic eigenstrain can generate microstructures with the morphological and kinetic feature of Widmanstätten plates. Then, we demonstrate that when isotropic viscoplasticity is considered, the plate lengthening remains stationary in isothermal conditions, but features slower growth rates and larger tip radii.
doi_str_mv	10.1016/j.scriptamat.2015.06.032
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subjects	Elasticity Mechanics Mechanics of materials Phase field modeling Phase transformations Physics Plasticity Widmanstätten
title	Plastic relaxation during diffusion-controlled growth of Widmanstätten plates
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