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Modification of dislocation emission sources at symmetric tilt grain boundaries in Ag by Cu solute atoms

TitleModification of dislocation emission sources at symmetric tilt grain boundaries in Ag by Cu solute atoms
Publication TypeJournal Article
Year of Publication2018
AuthorsBorovikov, V, Mendelev, MI
JournalMaterials Letters
Volume223
Pagination243-245
Date Published07
Type of ArticleArticle
ISBN Number0167-577X
Accession NumberWOS:000430884700061
Keywordsalloys, Dislocation emission source, Materials Science, metals, molecular dynamics simulation, Monte Carlo simulation, nanocrystalline copper, physics, size, Solute segregation at grain boundaries, Yield stress
Abstract

A very small amount of immiscible solutes can dramatically decrease the ability of dislocations to nucleate from grain boundaries. In this paper we report the results of the molecular dynamics simulations which show that at larger concentrations, the solute effect becomes rather non-trivial: there are concentration ranges where even small addition of solutes considerably suppresses the dislocation nucleation from grain boundaries and there are concentration ranges where addition of new solutes almost does not change the dislocation nucleation ability. We reveal the atomic mechanism of these effects. (C) 2018 Elsevier B.V. All rights reserved.

DOI10.1016/j.matlet.2018.04.045
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