Non-local model for diffusion-mediated dislocation climb and cavity growth

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Title: Non-local model for diffusion-mediated dislocation climb and cavity growth
Authors: Rovelli, I
Dudarev, SL
Sutton, AP
Item Type: Journal Article
Abstract: To design efficient thermal recovery procedures for structural materials in fusion energy applications it is important to characterise quantitatively the annealing timescales of radiation-induced defect clusters. With this goal in mind, we present an extension of the Green’s function formulation of Gu et al. (2015). for the climb of curved dislocations, to include in the same framework the evaporation and growth of cavities and the effects of free surfaces. This paper focuses on the mathematical foundations of the model, which makes use of boundary integral equations (París and Cañas, 1997) to solve the steady-state vacancy diffusion problem. Numerical results are also presented in the simplified case of a dilute configuration of prismatic dislocation loops and spherical cavities in a finite-size medium, which show good agreement with experimental data on high temperature annealing in ion-irradiated tungsten (Ferroni et al., 2015).
Issue Date: 18-Mar-2017
Date of Acceptance: 15-Mar-2017
URI: http://hdl.handle.net/10044/1/45665
DOI: https://dx.doi.org/10.1016/j.jmps.2017.03.008
ISSN: 1873-4782
Publisher: Elsevier
Start Page: 121
End Page: 141
Journal / Book Title: Journal of the Mechanics and Physics of Solids
Volume: 103
Copyright Statement: © 2017 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor/Funder: Engineering and Physical Sciences Research Council
Funder's Grant Number: EP/L015579/1
Keywords: 01 Mathematical Sciences
02 Physical Sciences
09 Engineering
Publication Status: Published
Appears in Collections:Condensed Matter Theory
Physics
Faculty of Natural Sciences



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