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Article: Solute effects on dislocation glide in metals

TitleSolute effects on dislocation glide in metals
Authors
KeywordsDislocation mobility
Lattice defects-dislocations
Strain aging
Issue Date2003
Citation
Acta Materialia, 2003, v. 51, n. 5, p. 1199-1210 How to Cite?
AbstractWe examine theoretically the impact of dissolved solute atoms on the motion of dislocations in metals and, hence, on their plastic response. Two regimes of behavior are distinguished; a low velocity regime, in which the dislocation drags a near equilibrium solute cloud, and a high velocity regime, in which the dislocation is alternately trapped and free running. In both regimes, the overdamped motion of a dislocation in the alloy is exactly as it would be in the pure system but with regime-dependent dislocation mobilities. In the low velocity regime, the forces between dislocations are replaced by forces between dislocation-solute cloud "quasiparticles." This paper provides analytical estimates for the mobilities in the two regimes, as well as expressions for calculating quasiparticle interactions. Finally, a prescription is provided for carrying out dislocation dynamics simulations without explicitly incorporating solute degrees of freedom. © 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/303209
ISSN
2023 Impact Factor: 8.3
2023 SCImago Journal Rankings: 2.916
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorRickman, J. M.-
dc.contributor.authorLeSar, R.-
dc.contributor.authorSrolovitz, D. J.-
dc.date.accessioned2021-09-15T08:24:51Z-
dc.date.available2021-09-15T08:24:51Z-
dc.date.issued2003-
dc.identifier.citationActa Materialia, 2003, v. 51, n. 5, p. 1199-1210-
dc.identifier.issn1359-6454-
dc.identifier.urihttp://hdl.handle.net/10722/303209-
dc.description.abstractWe examine theoretically the impact of dissolved solute atoms on the motion of dislocations in metals and, hence, on their plastic response. Two regimes of behavior are distinguished; a low velocity regime, in which the dislocation drags a near equilibrium solute cloud, and a high velocity regime, in which the dislocation is alternately trapped and free running. In both regimes, the overdamped motion of a dislocation in the alloy is exactly as it would be in the pure system but with regime-dependent dislocation mobilities. In the low velocity regime, the forces between dislocations are replaced by forces between dislocation-solute cloud "quasiparticles." This paper provides analytical estimates for the mobilities in the two regimes, as well as expressions for calculating quasiparticle interactions. Finally, a prescription is provided for carrying out dislocation dynamics simulations without explicitly incorporating solute degrees of freedom. © 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.-
dc.languageeng-
dc.relation.ispartofActa Materialia-
dc.subjectDislocation mobility-
dc.subjectLattice defects-dislocations-
dc.subjectStrain aging-
dc.titleSolute effects on dislocation glide in metals-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S1359-6454(02)00304-X-
dc.identifier.scopuseid_2-s2.0-0037436773-
dc.identifier.volume51-
dc.identifier.issue5-
dc.identifier.spage1199-
dc.identifier.epage1210-
dc.identifier.isiWOS:000181677700001-

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