Constitutive modeling of stress-driven grain growth in nanocrystalline metals

Handle URI:
http://hdl.handle.net/10754/594162
Title:
Constitutive modeling of stress-driven grain growth in nanocrystalline metals
Authors:
Gürses, Ercan; Wafai, Husam; El Sayed, Tamer S.
Abstract:
In this work, we present a variational multiscale model for grain growth in face-centered cubic nanocrystalline (nc) metals. In particular, grain-growth-induced stress softening and the resulting relaxation phenomena are addressed. The behavior of the polycrystal is described by a conventional Taylor-type averaging scheme in which the grains are treated as two-phase composites consisting of a grain interior phase and a grain boundary-affected zone. Furthermore, a grain-growth law that captures the experimentally observed characteristics of the grain coarsening phenomena is proposed. To this end, the grain size is not taken as constant and varies according to the proposed stress-driven growth law. Several parametric studies are conducted to emphasize the influence of the grain-growth rule on the overall macroscopic response. Finally, the model is shown to provide a good description of the experimentally observed grain-growth-induced relaxation in nc-copper. © 2013 IOP Publishing Ltd.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Physical Sciences and Engineering (PSE) Division
Citation:
Gürses E, Wafai H, Sayed TE (2013) Constitutive modeling of stress-driven grain growth in nanocrystalline metals. Modelling Simul Mater Sci Eng 21: 025011. Available: http://dx.doi.org/10.1088/0965-0393/21/2/025011.
Publisher:
IOP Publishing
Journal:
Modelling and Simulation in Materials Science and Engineering
Issue Date:
8-Feb-2013
DOI:
10.1088/0965-0393/21/2/025011
Type:
Article
ISSN:
0965-0393; 1361-651X
Sponsors:
This work was funded by KAUST baseline funds.
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.authorGürses, Ercanen
dc.contributor.authorWafai, Husamen
dc.contributor.authorEl Sayed, Tamer S.en
dc.date.accessioned2016-01-19T13:22:57Zen
dc.date.available2016-01-19T13:22:57Zen
dc.date.issued2013-02-08en
dc.identifier.citationGürses E, Wafai H, Sayed TE (2013) Constitutive modeling of stress-driven grain growth in nanocrystalline metals. Modelling Simul Mater Sci Eng 21: 025011. Available: http://dx.doi.org/10.1088/0965-0393/21/2/025011.en
dc.identifier.issn0965-0393en
dc.identifier.issn1361-651Xen
dc.identifier.doi10.1088/0965-0393/21/2/025011en
dc.identifier.urihttp://hdl.handle.net/10754/594162en
dc.description.abstractIn this work, we present a variational multiscale model for grain growth in face-centered cubic nanocrystalline (nc) metals. In particular, grain-growth-induced stress softening and the resulting relaxation phenomena are addressed. The behavior of the polycrystal is described by a conventional Taylor-type averaging scheme in which the grains are treated as two-phase composites consisting of a grain interior phase and a grain boundary-affected zone. Furthermore, a grain-growth law that captures the experimentally observed characteristics of the grain coarsening phenomena is proposed. To this end, the grain size is not taken as constant and varies according to the proposed stress-driven growth law. Several parametric studies are conducted to emphasize the influence of the grain-growth rule on the overall macroscopic response. Finally, the model is shown to provide a good description of the experimentally observed grain-growth-induced relaxation in nc-copper. © 2013 IOP Publishing Ltd.en
dc.description.sponsorshipThis work was funded by KAUST baseline funds.en
dc.publisherIOP Publishingen
dc.titleConstitutive modeling of stress-driven grain growth in 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.journalModelling and Simulation in Materials Science and Engineeringen
dc.contributor.institutionDepartment of Aerospace Engineering, Middle East Technical University, Ankara, Turkeyen
kaust.authorWafai, Husamen
kaust.authorEl Sayed, Tamer S.en
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