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dc.contributor.authorSweeney, C. A.
dc.contributor.authorO'Brien, B.
dc.contributor.authorDunne, F. P. E.
dc.contributor.authorMcHugh, Peter E.
dc.contributor.authorLeen, Sean B.
dc.date.accessioned2015-12-11T14:14:49Z
dc.date.available2015-12-11T14:14:49Z
dc.date.issued2014-07-30
dc.identifier.citationSweeney, C. A., O’Brien, B., Dunne, F. P. E., McHugh, P. E., & Leen, S. B. (2014). Strain-gradient modelling of grain size effects on fatigue of CoCr alloy. Acta Materialia, 78, 341-353. doi:https://doi.org/10.1016/j.actamat.2014.06.044en_IE
dc.identifier.issn1359-6454
dc.identifier.urihttp://hdl.handle.net/10379/5389
dc.description.abstractA strain-gradient crystal plasticity framework based on physical dislocation mechanisms is developed for simulation of the experimentally observed grain size effect on the low cycle fatigue of a CoCr alloy. Finite-element models of the measured microstructure are presented for both as-received and heat-treated CoCr material, with significantly different grain sizes. Candidate crystallographic slip-based parameters are implemented for prediction of fatigue crack initiation. The measured beneficial effects of fine grain size on both cyclic stress–strain response and crack initiation life are predicted. The build-up of geometrically necessary dislocations as a result of strain-gradients, leading to grain-size-dependent material hardening, is shown to play a key role.en_IE
dc.description.sponsorshipThe authors would like to acknowledge funding from the Irish Research Council under the EMBARK Initiative Scheme and the Irish Centre for High-End Computing (ICHEC) for the provision of computational facilities and support. The EBSD work in this study was carried out at the Materials and Surface Science Institute at the University of Limerick.en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherElsevieren_IE
dc.relation.ispartofActa Materialiaen
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/
dc.subjectSize effecten_IE
dc.subjectFatigue behaviouren_IE
dc.subjectCrystal plasticityen_IE
dc.subjectGeometrically necessary dislocationsen_IE
dc.subjectFinite elementen_IE
dc.titleStrain-gradient modelling of grain size effects on fatigue of CoCr alloyen_IE
dc.typeArticleen_IE
dc.date.updated2015-12-07T14:26:48Z
dc.identifier.doi10.1016/j.actamat.2014.06.044
dc.local.publishedsourcehttp://dx.doi.org/10.1016/j.actamat.2014.06.044en_IE
dc.description.peer-reviewedpeer-reviewed
dc.internal.rssid10134040
dc.local.contactSean Leen, Mechanical & Biomedical Eng, Eng-2051, New Engineering Building, Nui Galway. 5955 Email: sean.leen@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionPUBLISHED
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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Ireland