TY - JOUR
T1 - Phase-field simulation of intergranular bubble growth and percolation in bicrystals
AU - Millett, Paul C.
AU - Tonks, Michael R.
AU - Biner, S. B.
AU - Zhang, Liangzhe
AU - Chockalingam, K.
AU - Zhang, Yongfeng
N1 - Funding Information:
PCM gratefully acknowledges insightful conversations with David Andersson and Megan Frary. All authors gratefully acknowledge financial support from the Nuclear Energy Modeling and Simulation (NEAMS) program within the US Department of Energy.
Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/6
Y1 - 2012/6
N2 - Three-dimensional phase-field simulations of the growth and coalescence of intergranular bubbles in bicrystal grain geometries are presented. We investigate the dependency of bubble percolation on two factors: the initial bubble density and the bubble shape, which is governed by the ratio of the grain boundary energy over the surface energy. The simulations show that variations of each of these factors can lead to large discrepancies in the bubble coalescence rate, and eventual percolation, which may partially explain this observed occurrence in experimental investigations. The results presented here do not account for concurrent gas production and bubble resolution due to irradiation, therefore this simulation study is most applicable to post-irradiation annealing.
AB - Three-dimensional phase-field simulations of the growth and coalescence of intergranular bubbles in bicrystal grain geometries are presented. We investigate the dependency of bubble percolation on two factors: the initial bubble density and the bubble shape, which is governed by the ratio of the grain boundary energy over the surface energy. The simulations show that variations of each of these factors can lead to large discrepancies in the bubble coalescence rate, and eventual percolation, which may partially explain this observed occurrence in experimental investigations. The results presented here do not account for concurrent gas production and bubble resolution due to irradiation, therefore this simulation study is most applicable to post-irradiation annealing.
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U2 - 10.1016/j.jnucmat.2011.07.034
DO - 10.1016/j.jnucmat.2011.07.034
M3 - Article
AN - SCOPUS:83555172118
SN - 0022-3115
VL - 425
SP - 130
EP - 135
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -