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Kinetic Monte Carlo study of activated states and correlated shear-transformation-zone activity during the deformation of an amorphous metal

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dc.contributor.author Homer, Eric R.
dc.contributor.author Rodney, David
dc.contributor.author Schuh, Christopher A.
dc.date.accessioned 2010-07-14T18:30:45Z
dc.date.available 2010-07-14T18:30:45Z
dc.date.issued 2010-02
dc.date.submitted 2009-12
dc.identifier.issn 1098-0121
dc.identifier.issn 1550-235X
dc.identifier.uri http://hdl.handle.net/1721.1/56303
dc.description.abstract Shear transformation zone (STZ) dynamics simulations, which are based on the kinetic Monte Carlo algorithm, are used to model the mechanical response of amorphous metals and provide insight into the collective aspects of the microscopic events underlying deformation. The present analysis details the activated states of STZs in such a model, as well as the statistics of their activation and how these are affected by imposed conditions of stress and temperature. The analysis sheds light on the spatial and temporal correlations between the individual STZ activations that lead to different macroscopic modes of deformation. Three basic STZ correlation behaviors are observed: uncorrelated activity, nearest-neighbor correlation, and self-reactivating STZs. These three behaviors correspond well with the macroscopic deformation modes of homogeneous flow, inhomogeneous deformation, and elastic behavior, respectively. The effect of pre-existing stresses in the simulation cell is also studied and found to have a homogenizing effect on STZ correlations, suppressing the tendency for localization. en_US
dc.description.sponsorship United States. Office of Naval Research (Contract No. N00014-08-1-0312) en_US
dc.language.iso en_US
dc.publisher American Physical Society en_US
dc.relation.isversionof http://dx.doi.org/10.1103/PhysRevB.81.064204 en_US
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. en_US
dc.source APS en_US
dc.title Kinetic Monte Carlo study of activated states and correlated shear-transformation-zone activity during the deformation of an amorphous metal en_US
dc.type Article en_US
dc.identifier.citation Homer, Eric R., David Rodney, and Christopher A. Schuh. “Kinetic Monte Carlo study of activated states and correlated shear-transformation-zone activity during the deformation of an amorphous metal.” Physical Review B 81.6 (2010): 064204. © 2010 The American Physical Society en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Materials Science and Engineering en_US
dc.contributor.approver Schuh, Christopher A.
dc.contributor.mitauthor Homer, Eric R.
dc.contributor.mitauthor Rodney, David
dc.contributor.mitauthor Schuh, Christopher A.
dc.relation.journal Physical Review B en_US
dc.identifier.mitlicense PUBLISHER_POLICY en_US
dc.eprint.version Final published version en_US
dc.type.uri http://purl.org/eprint/type/JournalArticle en_US
eprint.status http://purl.org/eprint/status/PeerReviewed en_US
dspace.orderedauthors Homer, Eric R.; Rodney, David; Schuh, Christopher A. en


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