On tension-compression asymmetry in ultrafine-grained and nanocrystalline metals

Handle URI:
http://hdl.handle.net/10754/561569
Title:
On tension-compression asymmetry in ultrafine-grained and nanocrystalline metals
Authors:
Gurses, Ercan; El Sayed, Tamer S.
Abstract:
We present a physically motivated computational study explaining the tension/compression (T/C) asymmetry phenomenon in nanocrystalline (nc) and ultrafine-grained (ufg) face centered cubic (fcc) metals utilizing a variational constitutive model where the nc-metal is modeled as a two-phase material consisting of a grain interior phase and a grain boundary affected zone (GBAZ). We show that the existence of voids and their growth in GBAZ renders the material pressure sensitivity due to porous plasticity and that the utilized model provides a physically sound mechanism to capture the experimentally observed T/C asymmetry in nc- and ufg-metals. © 2010 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 BV
Journal:
Computational Materials Science
Issue Date:
Dec-2010
DOI:
10.1016/j.commatsci.2010.09.028
Type:
Article
ISSN:
09270256
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.accessioned2015-08-02T09:14:25Zen
dc.date.available2015-08-02T09:14:25Zen
dc.date.issued2010-12en
dc.identifier.issn09270256en
dc.identifier.doi10.1016/j.commatsci.2010.09.028en
dc.identifier.urihttp://hdl.handle.net/10754/561569en
dc.description.abstractWe present a physically motivated computational study explaining the tension/compression (T/C) asymmetry phenomenon in nanocrystalline (nc) and ultrafine-grained (ufg) face centered cubic (fcc) metals utilizing a variational constitutive model where the nc-metal is modeled as a two-phase material consisting of a grain interior phase and a grain boundary affected zone (GBAZ). We show that the existence of voids and their growth in GBAZ renders the material pressure sensitivity due to porous plasticity and that the utilized model provides a physically sound mechanism to capture the experimentally observed T/C asymmetry in nc- and ufg-metals. © 2010 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThis work was fully funded by the KAUST baseline fund.en
dc.publisherElsevier BVen
dc.subjectCrystal plasticityen
dc.subjectNanocrystalline metalsen
dc.subjectPorous plasticityen
dc.subjectTension/compression asymmetryen
dc.subjectVoidsen
dc.titleOn tension-compression asymmetry in ultrafine-grained and nanocrystalline metalsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalComputational Materials Scienceen
kaust.authorGurses, Ercanen
kaust.authorEl Sayed, Tamer S.en
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