Journal
SCRIPTA MATERIALIA
Volume 66, Issue 1, Pages 17-20Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.09.027
Keywords
Modeling; Precipitation; Grain boundary structure; He bubbles
Categories
Funding
- Center for Materials at Irradiation and Mechanical Extremes
- US Department of Energy [2008LANL1026]
- Laboratory Directed Research and Development Program
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We report on a study of nanoscale He bubble precipitation and growth at a twist grain boundary in two face-centered cubic materials. Experimentally, the twist boundary in Au captures all the He in the sample, forming equal-sized bubbles at the dislocation intersection junctions. Simulations in Cu reveal a complex structure of the interface and different He pressure in the interface bubbles compared to bulk, providing an explanation for the high efficiency of the boundary to capture all the He in the sample. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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