The abrasive wear resistance of austempered spheroidal graphite irons

dc.contributor.advisorAllen, Colinen_ZA
dc.contributor.authorShepperson, S Ven_ZA
dc.date.accessioned2016-03-11T14:24:16Z
dc.date.available2016-03-11T14:24:16Z
dc.date.issued1987en_ZA
dc.descriptionBibliography: pages 103-107.en_ZA
dc.description.abstractA study has been made of the structure and abrasive wear resistance of two austempered commercial spheroidal cast irons. Heat treatments have been carried out for different times between 2 and 120 minutes for a range of austenitising temperatures between 850°C and 950°C and austempering temperatures between 250°C and 450°C. The morphology and constitution of the resulting dual phase ferrite/austenite structure has been examined using optical and scanning electron microscopy and x-ray analysis. The maximum quantity of retained austenite in the structure has been shown to vary up to 50% and to be strongly dependent on heat treatment parameters and the composition of the iron. Laboratory abrasive wear testing has been carried out on these austempered irons and compared with the results of similar tests on a range of abrasion resistant carbon steels. All the austempered irons were found to have better abrasion resistance than proprietary abrasion resistant steels. These austempered irons derive their outstanding properties from the morphology of the dual phase ferritic/austenitic matrix coupled to the high work hardening characteristics brought about by the stress induced austenite to martensite transformation during abrasion. The influence of microstructure and mechanically induced transformation has been studied as a function of austempering temperature and time.en_ZA
dc.identifier.apacitationShepperson, S. V. (1987). <i>The abrasive wear resistance of austempered spheroidal graphite irons</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering. Retrieved from http://hdl.handle.net/11427/17647en_ZA
dc.identifier.chicagocitationShepperson, S V. <i>"The abrasive wear resistance of austempered spheroidal graphite irons."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1987. http://hdl.handle.net/11427/17647en_ZA
dc.identifier.citationShepperson, S. 1987. The abrasive wear resistance of austempered spheroidal graphite irons. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Shepperson, S V AB - A study has been made of the structure and abrasive wear resistance of two austempered commercial spheroidal cast irons. Heat treatments have been carried out for different times between 2 and 120 minutes for a range of austenitising temperatures between 850°C and 950°C and austempering temperatures between 250°C and 450°C. The morphology and constitution of the resulting dual phase ferrite/austenite structure has been examined using optical and scanning electron microscopy and x-ray analysis. The maximum quantity of retained austenite in the structure has been shown to vary up to 50% and to be strongly dependent on heat treatment parameters and the composition of the iron. Laboratory abrasive wear testing has been carried out on these austempered irons and compared with the results of similar tests on a range of abrasion resistant carbon steels. All the austempered irons were found to have better abrasion resistance than proprietary abrasion resistant steels. These austempered irons derive their outstanding properties from the morphology of the dual phase ferritic/austenitic matrix coupled to the high work hardening characteristics brought about by the stress induced austenite to martensite transformation during abrasion. The influence of microstructure and mechanically induced transformation has been studied as a function of austempering temperature and time. DA - 1987 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1987 T1 - The abrasive wear resistance of austempered spheroidal graphite irons TI - The abrasive wear resistance of austempered spheroidal graphite irons UR - http://hdl.handle.net/11427/17647 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17647
dc.identifier.vancouvercitationShepperson SV. The abrasive wear resistance of austempered spheroidal graphite irons. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1987 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17647en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentCentre for Materials Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMaterials Engineeringen_ZA
dc.subject.otherApplied Scienceen_ZA
dc.titleThe abrasive wear resistance of austempered spheroidal graphite ironsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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