Dislocation pinning effects on fracture behavior: Atomistic and dislocation dynamics simulations

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dc.contributorVirginia Techen
dc.contributor.authorNoronha, S. J.en
dc.contributor.authorFarkas, Dianaen
dc.contributor.departmentMaterials Science and Engineering (MSE)en
dc.date.accessed2014-04-23en
dc.date.accessioned2014-05-07T15:36:54Zen
dc.date.available2014-05-07T15:36:54Zen
dc.date.issued2002-10-01en
dc.description.abstractWe introduce an approach in which results from atomistic simulations are combined with discrete dislocation dynamics simulations of crack-tip plasticity. The method is used to study the effects of dislocation pinning due to grain boundaries or secondary particles on the fracture behavior of aluminum. We find that the fracture resistance is reduced with decreasing pinning distance. The results show that the pinning of the dislocations causes a net decrease in the shear stress projected on the slip plane, preventing further dislocation emission. Semibrittle cleavage occurs after a certain number of dislocations is emitted.en
dc.description.sponsorshipOffice of Naval Research, Division of Materials Scienceen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationNoronha, S. J.; Farkas, D., "Dislocation pinning effects on fracture behavior: Atomistic and dislocation dynamics simulations," Phys. Rev. B 66, 132103 DOI: http://dx.doi.org/10.1103/PhysRevB.66.132103en
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.66.132103en
dc.identifier.issn1098-0121en
dc.identifier.urihttp://hdl.handle.net/10919/47827en
dc.identifier.urlhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.66.132103en
dc.language.isoen_USen
dc.publisherAmerican Physical Societyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectTo-ductile transitionen
dc.subjectCrack tipen
dc.subjectNanocrystallineen
dc.subjectInstabilityen
dc.subjectNucleationen
dc.subjectMetalsen
dc.subjectALen
dc.subjectPhysicsen
dc.subjectCondensed matteren
dc.titleDislocation pinning effects on fracture behavior: Atomistic and dislocation dynamics simulationsen
dc.title.serialPhysical Review Ben
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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