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A precipitate evolution-based continuum damage mechanics model of creep behaviour in welded 9Cr steel at high temperature

dc.contributor.authorÓ Murchú, Cathal
dc.contributor.authorLeen, Sean B.
dc.contributor.authorO’Donoghue, Padraic E.
dc.contributor.authorBarrett, Richard A.
dc.date.accessioned2019-12-11T09:04:52Z
dc.date.available2019-12-11T09:04:52Z
dc.date.issued2018-04-04
dc.identifier.citationÓ Murchú, C., Leen, S., O’Donoghue, P., & Barrett, R. (2019). A precipitate evolution-based continuum damage mechanics model of creep behaviour in welded 9Cr steel at high temperature. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 233(1), 39–51. https://doi.org/10.1177/1464420718762607en_IE
dc.identifier.issn1464-4207
dc.identifier.issn2041-3076
dc.identifier.urihttp://hdl.handle.net/10379/15630
dc.description.abstractA multiaxial, physically based, continuum damage mechanics methodology for creep of welded 9Cr steels is presented, incorporating a multiple precipitate-type state variable, which simulates the effects of strain- and temperature-induced coarsening kinematics. Precipitate volume fraction and initial diameter for carbide and carbo-nitride precipitate types are key microstructural variables controlling time to failure in the model. The heat-affected zone material is simulated explicitly utilising measured microstructural data, allowing detailed investigation of failure mechanisms. Failure is shown to be controlled by a combination of microstructural degradation and Kachanov-type damage for the formation and growth of creep cavities. Comparisons with experimental data demonstrate the accuracy of this model for P91 material.en_IE
dc.description.sponsorshipThis publication has emanated from research conducted with the financial support of (i) the Irish Research Council under Project Number GOIPG/2015/3944 and (ii) Science Foundation Ireland as part of the MECHANNICS joint project between NUI Galway and University of Limerick under Grant Number SFI/14/IA/2604.en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherSAGE Publicationsen_IE
dc.relation.ispartofProceedings Of The Institution Of Mechanical Engineers Part L-Journal Of Materials-Design And Applicationsen
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/
dc.subjectLONG-TERM CREEPen_IE
dc.subjectP91 STEELen_IE
dc.subjectMICROSTRUCTURAL ZONESen_IE
dc.subjectWELDMENTen_IE
dc.subjectFAILUREen_IE
dc.subjectJOINTen_IE
dc.titleA precipitate evolution-based continuum damage mechanics model of creep behaviour in welded 9Cr steel at high temperatureen_IE
dc.typeArticleen_IE
dc.date.updated2019-12-10T15:41:10Z
dc.identifier.doi10.1177/1464420718762607
dc.local.publishedsourcehttps://doi.org/10.1177/1464420718762607en_IE
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funderIrish Research Councilen_IE
dc.contributor.funderScience Foundation Irelanden_IE
dc.internal.rssid18780253
dc.local.contactCathal Ó Murchú, Alice Perry Engineering Building, Eng 2053, Desk 065, Nui Galway. - Email: c.omurchu3@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionACCEPTED
dcterms.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/14/IA/2604/IE/Multi-scale, Through-process Chracterisation for Innovative Manufacture of Next-generation Welded Connections (MECHANNICS)/en_IE
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Attribution-NonCommercial-NoDerivs 3.0 Ireland
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Ireland