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Article: Dislocation annihilation in plastic deformation: I. Multiscale irreversible thermodynamics

TitleDislocation annihilation in plastic deformation: I. Multiscale irreversible thermodynamics
Authors
KeywordsCompositional effects
Dislocation annihilation
Dislocation climb
Grain size
Industrial alloys
Issue Date2012
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/actamat
Citation
Acta Materialia, 2012, v. 60 n. 6-7, p. 2606-2614 How to Cite?
AbstractIrreversible thermodynamics is employed as a framework to describe plastic deformation in pure metals and alloys. Expressions to describe saturation stress in single crystals and nanocrystals are employed over wide ranges of temperature, strain rate and grain size. The importance of the roles played by vacancy self-diffusion in dislocation climb and in plasticity is shown. Equations to describe the stress-strain response of single crystals and ultrafine-grained metals are derived. The activation energy for dislocation annihilation plays a central role in the mechanical response of the systems. Succinct formulations for predicting hot deformation behaviour and relaxation of industrial alloys are presented; the influence of composition in the activation energy for dislocation annihilation is shown. All formulations describing stress-strain relationships can be reduced to Kocks-Mecking classical formulation, but incorporating grain size and compositional effects. The importance of the recovery term in such formulation is established, as well as the need to obtain it employing more fundamental approaches. © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/157183
ISSN
2015 Impact Factor: 5.058
2015 SCImago Journal Rankings: 3.683
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorRivera-Díaz-del-Castillo, PEJen_US
dc.contributor.authorHuang, Men_US
dc.date.accessioned2012-08-08T08:45:42Z-
dc.date.available2012-08-08T08:45:42Z-
dc.date.issued2012en_US
dc.identifier.citationActa Materialia, 2012, v. 60 n. 6-7, p. 2606-2614en_US
dc.identifier.issn1359-6454en_US
dc.identifier.urihttp://hdl.handle.net/10722/157183-
dc.description.abstractIrreversible thermodynamics is employed as a framework to describe plastic deformation in pure metals and alloys. Expressions to describe saturation stress in single crystals and nanocrystals are employed over wide ranges of temperature, strain rate and grain size. The importance of the roles played by vacancy self-diffusion in dislocation climb and in plasticity is shown. Equations to describe the stress-strain response of single crystals and ultrafine-grained metals are derived. The activation energy for dislocation annihilation plays a central role in the mechanical response of the systems. Succinct formulations for predicting hot deformation behaviour and relaxation of industrial alloys are presented; the influence of composition in the activation energy for dislocation annihilation is shown. All formulations describing stress-strain relationships can be reduced to Kocks-Mecking classical formulation, but incorporating grain size and compositional effects. The importance of the recovery term in such formulation is established, as well as the need to obtain it employing more fundamental approaches. © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/actamaten_US
dc.relation.ispartofActa Materialiaen_US
dc.subjectCompositional effectsen_US
dc.subjectDislocation annihilationen_US
dc.subjectDislocation climben_US
dc.subjectGrain sizeen_US
dc.subjectIndustrial alloysen_US
dc.titleDislocation annihilation in plastic deformation: I. Multiscale irreversible thermodynamicsen_US
dc.typeArticleen_US
dc.identifier.emailHuang, M: mxhuang@hku.hken_US
dc.identifier.authorityHuang, M=rp01418en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.actamat.2012.01.027en_US
dc.identifier.scopuseid_2-s2.0-84859104790en_US
dc.identifier.hkuros205721-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84859104790&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume60en_US
dc.identifier.issue6-7en_US
dc.identifier.spage2606en_US
dc.identifier.epage2614en_US
dc.identifier.eissn1873-2453-
dc.identifier.isiWOS:000303952000014-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridHuang, M=23469788700en_US
dc.identifier.scopusauthoridRiveraDíazDelCastillo, PEJ=6603017212en_US
dc.identifier.citeulike10437089-

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