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dc.contributor.authorHall, Cameron L.
dc.date.accessioned2016-02-25T12:43:13Z
dc.date.available2016-02-25T12:43:13Z
dc.date.issued2010-10-14
dc.identifier.citationHall CL (2010) Asymptotic expressions for the nearest and furthest dislocations in a pile-up against a grain boundary. Philosophical Magazine 90: 3879–3890. Available: http://dx.doi.org/10.1080/14786435.2010.499859.
dc.identifier.issn1478-6435
dc.identifier.issn1478-6443
dc.identifier.doi10.1080/14786435.2010.499859
dc.identifier.urihttp://hdl.handle.net/10754/597622
dc.description.abstractIn 1965, Armstrong and Head explored the problem of a pile-up of screw dislocations against a grain boundary. They used numerical methods to determine the positions of the dislocations in the pile-up and they were able to fit approximate formulae for the locations of the first and last dislocations. These formulae were used to gain insights into the Hall-Petch relationship. More recently, Voskoboinikov et al. used asymptotic techniques to study the equivalent problem of a pile-up of a large number of screw dislocations against a bimetallic interface. In this paper, we extend the work of Voskoboinikov et al. to construct systematic asymptotic expressions for the formulae proposed by Armstrong and Head. The further extension of these techniques to more general pile-ups is also outlined. As a result of this work, we show that a pile-up against a grain boundary can become equivalent to a pile-up against a locked dislocation in the case where the mismatch across the boundary is small. © 2010 Taylor & Francis.
dc.description.sponsorshipThis publication is based on work supported by Award No. KUK-C1-013-04, made by the King Abdullah University of Science and Technology (KAUST). I would like to acknowledge the contributions of John R. Ockendon (Oxford), S. Jonathan Chapman (Oxford), Roman E. Voskoboynikov (Kurchatov) and Graeme C. Wake (Massey), with whom I discussed various aspects of this work.
dc.publisherInforma UK Limited
dc.subjectasymptotic analysis
dc.subjectdislocation interactions
dc.subjectdislocation theory
dc.subjectgrain boundaries
dc.titleAsymptotic expressions for the nearest and furthest dislocations in a pile-up against a grain boundary
dc.typeArticle
dc.identifier.journalPhilosophical Magazine
dc.contributor.institutionUniversity of Oxford, Oxford, United Kingdom
kaust.grant.numberKUK-C1-013-04


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