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dc.contributor.authorGurses, Ercan
dc.contributor.authorEl Sayed, Tamer S.
dc.date.accessioned2015-08-03T09:34:27Z
dc.date.available2015-08-03T09:34:27Z
dc.date.issued2011-12
dc.identifier.citationGürses, E., & El Sayed, T. (2011). A constitutive model of nanocrystalline metals based on competing grain boundary and grain interior deformation mechanisms. Materials Letters, 65(23-24), 3391–3395. doi:10.1016/j.matlet.2011.07.039
dc.identifier.issn0167577X
dc.identifier.doi10.1016/j.matlet.2011.07.039
dc.identifier.urihttp://hdl.handle.net/10754/561934
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.
dc.description.sponsorshipThis work was fully funded by the KAUST baseline fund.
dc.publisherElsevier BV
dc.subjectDiffusion
dc.subjectGrain boundaries
dc.subjectNanocrystalline materials
dc.subjectSimulation and modeling
dc.titleA constitutive model of nanocrystalline metals based on competing grain boundary and grain interior deformation mechanisms
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalMaterials Letters
kaust.personGurses, Ercan
kaust.personEl Sayed, Tamer S.


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