The high temperature wear mechanisms of iron-nickel steel (NCF 3015) and nickel based superalloy (inconel 751) engine valves

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dc.contributor.authorBayata, Fatma
dc.contributor.authorAlpas, Ahmet T.
dc.date.accessioned2024-07-18T20:56:06Z
dc.date.available2024-07-18T20:56:06Z
dc.date.issued2021
dc.departmentİstanbul Bilgi Üniversitesien_US
dc.description.abstractHigh temperature sliding wear tests were performed on samples taken from NCF 3015 austenitic steel (Fe-32% Ni-14% Cr based 0.8% C alloy with Al, Ti, Nb, Mo) and Inconel 751 superalloy (Ni-16%Cr alloy with Al, Ti, Nb) engine valves using the counterfaces made of PL12 chromium alloyed cast iron seat insert. The contact surfaces were characterized by SEM-EDS, Optical Profilometer, Raman, XRD. The wear mechanisms of the valve systems were explored using the results of these analyses that determined compositions of the tribolayers that formed on the contact surfaces. The Calphad based thermodynamic analyses that revealed stability of the precipitates in the alloys at the test temperatures. An increase of wear occurred between 25 degrees C and 350 degrees C, but for T > 350 degrees C, a continuous reduction in volumetric wear losses were observed with increasing temperature for both alloys. At all temperatures Inconel 751 showed higher wear performance than NCF 3015. It was found that the formation of (Fe1-x-yCrxNiy)(3)O-4 mixed spinel oxides controlled the high temperature wear behavior of these alloys and these structures support the formation of tribolayer under local pressure and high temperature during sliding. Besides the direct effect of oxide compositions within tribolayer, the formation of high amount of (Ti,Nb)C carbides, Ni-3(Ti,Nb,Al) and Ni3Nb precipitates play important role in transition from severe to mild wear regime above 350 degrees C.en_US
dc.identifier.doi10.1016/j.wear.2021.203943
dc.identifier.issn0043-1648
dc.identifier.issn1873-2577
dc.identifier.scopus2-s2.0-85107142502en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.wear.2021.203943
dc.identifier.urihttps://hdl.handle.net/11411/8870
dc.identifier.volume480en_US
dc.identifier.wosWOS:000663556500001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofWearen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectHigh Temperature Wearen_US
dc.subjectEngine Valveen_US
dc.subjectValve Seat İnserten_US
dc.subjectInconel 751en_US
dc.subjectNcf 3015en_US
dc.subjectSurface Oxide-Filmsen_US
dc.subjectFretting Wearen_US
dc.subjectExhaust Valveen_US
dc.subjectSliding Wearen_US
dc.subjectMild-Steelen_US
dc.subjectRamanen_US
dc.subjectAlloysen_US
dc.subjectParticlesen_US
dc.subjectSystemen_US
dc.titleThe high temperature wear mechanisms of iron-nickel steel (NCF 3015) and nickel based superalloy (inconel 751) engine valvesen_US
dc.typeArticleen_US

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