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dc.contributor.authorO'Hara, Eimear M.
dc.contributor.authorPhelan, B.
dc.contributor.authorOsgerby, S.
dc.contributor.authorBarrett, Richard A.
dc.contributor.authorRaghavendra, R.
dc.contributor.authorLeen, Sean B.
dc.contributor.authorHarrison, Noel M.
dc.date.accessioned2021-04-01T09:02:28Z
dc.date.issued2020-05-22
dc.identifier.citationO'Hara, E. M., Phelan, B., Osgerby, S., Barrett, R. A., Raghavendra, R., Leen, S. B., & Harrison, N. M. (2020). Experimental and computational characterization of the effect of manufacturing-induced defects on high temperature, low-cycle fatigue for MarBN. Materialia, 12, doi:https://doi.org/10.1016/j.mtla.2020.100683en_IE
dc.identifier.issn2589-1529
dc.identifier.urihttp://hdl.handle.net/10379/16672
dc.description.abstractManufacturing-induced defects are a key source of crack initiation and component failure under high temperature cyclic loading. In this work, 3D X-ray micro-computed tomography and microstructural analysis of manufacturing-induced defects is presented for forged and cast MarBN martensitic-ferritic steel, along with high temperature, low cycle fatigue testing, for assessment of the comparative effects of two manufacturing processes. Forging is found to significantly reduce the volume fraction and complexity of manufacturing defects, compared to the cast material, resulting in approximately double the fatigue life. A voxel-based finite element methodology for experimentally-identified cast and forged manufacturing defects is presented, in conjunction with a multiaxial, critical-plane damage model, within a unified viscoplastic user-material subroutine. The effect of the complex morphologies of the manufacturing defects on high temperature fatigue crack initiation is thus quantified, highlighting the relative effects of the two different manufacturing processes.en_IE
dc.description.sponsorshipThe authors gratefully acknowledge funding from the Irish Research Council and GE Power under the Enterprise Partnership Scheme (EPSPG/2015/55), and the SFI Research Centre for Advanced Manufacturing, I-Form (SFI/16/RC/3872). The authors would like to express their gratitude to those in the IMPEL consortium. The authors acknowledge the facilities and technical assistance of the Centre for Microscopy & Imaging at the National University of Ireland Galway. The authors wish to acknowledge the DJEI/DES/SFI/HEA Irish Centre for High-End Computing (ICHEC) for the provision of computational facilities and support.en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherElsevieren_IE
dc.relation.ispartofMaterialiaen
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/
dc.subjectDefectsen_IE
dc.subjectFatigue crack initiationen_IE
dc.subjectX-ray computed tomographyen_IE
dc.subjectHigh-temperature deformationen_IE
dc.subjectMartensiteen_IE
dc.subjectVISCOPLASTIC CONSTITUTIVE-EQUATIONSen_IE
dc.subjectTEMPERED MARTENSITIC STEELen_IE
dc.subjectNONMETALLIC INCLUSIONSen_IE
dc.subjectCRACK INITIATIONen_IE
dc.subjectMICRO-TOMOGRAPHYen_IE
dc.subjectCREEP-PROPERTIESen_IE
dc.subjectMODELen_IE
dc.subjectMECHANISMSen_IE
dc.subjectEVOLUTIONen_IE
dc.subjectBEHAVIORen_IE
dc.titleExperimental and computational characterization of the effect of manufacturing-induced defects on high temperature, low-cycle fatigue for MarBNen_IE
dc.typeArticleen_IE
dc.date.updated2021-04-01T08:48:49Z
dc.identifier.doi10.1016/j.mtla.2020.100683
dc.local.publishedsourcehttps://doi.org/10.1016/j.mtla.2020.100683en_IE
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funderIrish Research Councilen_IE
dc.contributor.funderScience Foundation Irelanden_IE
dc.description.embargo2021-05-22
dc.internal.rssid22466962
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.versionACCEPTED
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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Ireland