A constitutive model of nanocrystalline metals based on competing grain boundary and grain interior deformation mechanisms

Handle URI:
http://hdl.handle.net/10754/561934
Title:
A constitutive model of nanocrystalline metals based on competing grain boundary and grain interior deformation mechanisms
Authors:
Gurses, Ercan; El Sayed, Tamer S.
Abstract:
In this work, a viscoplastic constitutive model for nanocrystalline metals is presented. The model is based on competing grain boundary and grain interior deformation mechanisms. In particular, inelastic deformations caused by grain boundary diffusion, grain boundary sliding and dislocation activities are considered. Effects of pressure on the grain boundary diffusion and sliding mechanisms are taken into account. Furthermore, the influence of grain size distribution on macroscopic response is studied. The model is shown to capture the fundamental mechanical characteristics of nanocrystalline metals. These include grain size dependence of the strength, i.e., both the traditional and the inverse Hall-Petch effects, the tension-compression asymmetry and the enhanced rate sensitivity. © 2011 Elsevier B.V. All rights reserved.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Physical Sciences and Engineering (PSE) Division
Publisher:
Elsevier
Journal:
Materials Letters
Issue Date:
Dec-2011
DOI:
10.1016/j.matlet.2011.07.039
Type:
Article
ISSN:
0167577X
Sponsors:
This work was fully funded by the KAUST baseline fund.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorGurses, Ercanen
dc.contributor.authorEl Sayed, Tamer S.en
dc.date.accessioned2015-08-03T09:34:27Zen
dc.date.available2015-08-03T09:34:27Zen
dc.date.issued2011-12en
dc.identifier.issn0167577Xen
dc.identifier.doi10.1016/j.matlet.2011.07.039en
dc.identifier.urihttp://hdl.handle.net/10754/561934en
dc.description.abstractIn this work, a viscoplastic constitutive model for nanocrystalline metals is presented. The model is based on competing grain boundary and grain interior deformation mechanisms. In particular, inelastic deformations caused by grain boundary diffusion, grain boundary sliding and dislocation activities are considered. Effects of pressure on the grain boundary diffusion and sliding mechanisms are taken into account. Furthermore, the influence of grain size distribution on macroscopic response is studied. The model is shown to capture the fundamental mechanical characteristics of nanocrystalline metals. These include grain size dependence of the strength, i.e., both the traditional and the inverse Hall-Petch effects, the tension-compression asymmetry and the enhanced rate sensitivity. © 2011 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThis work was fully funded by the KAUST baseline fund.en
dc.publisherElsevieren
dc.subjectDiffusionen
dc.subjectGrain boundariesen
dc.subjectNanocrystalline materialsen
dc.subjectSimulation and modelingen
dc.titleA constitutive model of nanocrystalline metals based on competing grain boundary and grain interior deformation mechanismsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalMaterials Lettersen
kaust.authorGurses, Ercanen
kaust.authorEl Sayed, Tamer S.en
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