Near-threshold fatigue crack growth behaviour of mild steel in steam during rotating bending

dc.contributor.advisorVan Rooyen, Gerrit T.en
dc.contributor.emailulyate.curle@up.ac.zaen
dc.contributor.postgraduateCurle, Ulyate Andriesen
dc.date.accessioned2013-09-07T19:01:39Z
dc.date.available2007-12-19en
dc.date.available2013-09-07T19:01:39Z
dc.date.created2007-04-24en
dc.date.issued2007-12-19en
dc.date.submitted2007-12-19en
dc.descriptionDissertation (MEng (Metallurgical Engineering))--University of Pretoria, 2007.en
dc.description.abstractThe influences of a superheated steam environment and temperature on the nearthreshold crack growth behaviour of mild steel during rotating bending fatigue were investigated. A fatigue machine in which rotating bending is simulated was designed and built to allow continuous crack growth measurement. Experiments compared the threshold stress intensities (∆Kth ) for air at 24 °C, air at 160 °C and steam at 160 °C.Air at 160 °C yielded the lowest threshold stress intensity in both cases. Oxide thicknesses in the vicinity of the threshold were estimated from temper colours. The difference in threshold stress intensities can be explained by the concept of oxideinduced crack closure.en
dc.description.availabilityunrestricteden
dc.description.degreeMEng
dc.description.departmentMaterials Science and Metallurgical Engineeringen
dc.identifier.citationCurle, UA 2007, Near-threshold fatigue crack growth behaviour of mild steel in steam during rotating bending, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/30429>
dc.identifier.otherPretoriaen
dc.identifier.upetdurlhttp://upetd.up.ac.za/thesis/available/etd-12192007-150550/en
dc.identifier.urihttp://hdl.handle.net/2263/30429
dc.language.isoen
dc.publisherUniversity of Pretoriaen_ZA
dc.rights© University of Pretoren
dc.subjectCrack closureen
dc.subjectEnvorinmenten
dc.subjectNear-threshold crack propagationen
dc.subjectSteamen
dc.subjectOxide-induceden
dc.subjectRotating bending fatigueen
dc.subjectUCTDen_US
dc.titleNear-threshold fatigue crack growth behaviour of mild steel in steam during rotating bendingen
dc.typeDissertationen

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