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Coupled motion of grain boundaries in bcc tungsten as a possible radiation-damage healing mechanism under fusion reactor conditions

TitleCoupled motion of grain boundaries in bcc tungsten as a possible radiation-damage healing mechanism under fusion reactor conditions
Publication TypeJournal Article
Year of Publication2013
AuthorsBorovikov, V, Tang, XZ, Perez, D, Bai, XM, Uberuaga, BP, Voter, AF
JournalNuclear Fusion
Volume53
Pagination063001
Date Published06
Type of ArticleArticle
ISBN Number0029-5515
Accession NumberWOS:000319421800001
Keywordshelium, iron, irradiation, iter, metals, migration, molecular-dynamics, rotation, simulation
Abstract

As a potential first-wall fusion reactor material, tungsten will be subjected to high radiation flux and extreme mechanical stress. We propose that under these conditions, coupled grain boundary ( GB) motion, in some cases enhanced by interstitial loading, can lead to a radiation-damage healing mechanism, in which a large stress activates coupled GB motion, and the GB sweeps up the defects, such as voids and vacancies, as it passes through the material. The stress-induced mobility characteristics of a number of GBs in tungsten are examined to investigate the likelihood of this scenario.

DOI10.1088/0029-5515/53/6/063001
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