Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5454328 | Journal of Nuclear Materials | 2016 | 7 Pages |
Abstract
With large-scale molecular dynamics simulations, we investigate systematically the interaction of displacement cascades with a set of Σ3ã110ã tilt grain boundaries (GBs) in Cu bicrystals at low ambient temperatures, as regards irradiation-induced defect production/absorption and GB migration/faceting. Except for coherent twin boundary, GBs exhibit pronounced preferential absorption of interstitials, which depends on initial primary knock-on atom distance from GB plane and inclination angle. GB migration occurs when displacement cascades overlap with a GB plane, as induced by recrystallization of thermal spike, and concurrent asymmetric grain growth. Faceting occurs via expanding coherent twin boundaries for asymmetric GBs.
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Authors
Bo Li, Xiao-Jiang Long, Zhao-Wu Shen, Sheng-Nian Luo,