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dc.identifier.urihttp://hdl.handle.net/11401/76370
dc.description.sponsorshipThis work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.en_US
dc.formatMonograph
dc.format.mediumElectronic Resourceen_US
dc.language.isoen_US
dc.publisherThe Graduate School, Stony Brook University: Stony Brook, NY.
dc.typeThesis
dcterms.abstractStress-assisted grain growth in nanocrystalline metals transpires collectively with a number of competing deformation mechanisms. In this study, molecular dynamics simulations of surface nanoindentation were performed to quantify the plastic strain distribution among competing mechanisms as a function of grain size and temperature during stress-assisted grain growth in nanocrystalline Ni and a Ni-1 at. % P alloy. Under identical conditions of rate and temperature in nominally the same grain size structure, stress-assisted grain growth found to be prevalent in pure nanocrystalline Ni was virtually absent in the Ni-P alloy with P enriched grain boundaries. A reduction in the deformation temperature also quelled mechanical grain growth in both nanocrystalline Ni, suggesting thermal activation was inherent to the governing physics. Plastic strain was found to be highly localized in the grain boundaries during nanoindentation, and dislocation activity while present, did not represent the dominant carrier of plasticity but an opponent factor against grain growth.
dcterms.available2017-09-20T16:50:07Z
dcterms.contributorTrelewicz, Jasonen_US
dcterms.contributorGersappe, Dilip.en_US
dcterms.creatorZHANG, YANG
dcterms.dateAccepted2017-09-20T16:50:07Z
dcterms.dateSubmitted2017-09-20T16:50:07Z
dcterms.descriptionDepartment of Materials Science and Engineering.en_US
dcterms.extent59 pg.en_US
dcterms.formatApplication/PDFen_US
dcterms.formatMonograph
dcterms.identifierhttp://hdl.handle.net/11401/76370
dcterms.issued2015-12-01
dcterms.languageen_US
dcterms.provenanceMade available in DSpace on 2017-09-20T16:50:07Z (GMT). No. of bitstreams: 1 ZHANG_grad.sunysb_0771M_12545.pdf: 4195912 bytes, checksum: 3439ace8a7ac9aa4769b3f4d471627d8 (MD5) Previous issue date: 1en
dcterms.publisherThe Graduate School, Stony Brook University: Stony Brook, NY.
dcterms.subjectAtomistic Simulation, Grain Boundary Segregation, Grain Rotation, Nanocrystalline Materials, Nanoindentation, Stress-assisted Grain Growth
dcterms.subjectMaterials Science
dcterms.titleStress-assisted Grain Growth in Nanocrystalline Metals Inhibited by Grain Boundary Segregation
dcterms.typeThesis


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