High Temperature Oxidation Behavior of High Al-Si Alloyed Vermicular Graphite Cast Iron for Internal Combustion Engine's Hot-End Exhaust Components

Basit Öğe Kaydı
dc.authorid0000-0002-6493-7711
dc.authorid0000-0001-8698-4060
dc.contributor.authorYilmaz, Rifat
dc.contributor.authorBayata, Fatma
dc.contributor.authorSolak, Nuri
dc.date.accessioned2026-04-04T18:56:08Z
dc.date.available2026-04-04T18:56:08Z
dc.date.issued2024
dc.departmentİstanbul Bilgi Üniversitesi
dc.description.abstractThis study investigated the influence of high silicon (4.2 wt%) and varying aluminum (3.5-4.8 wt%) content on the high temperature oxidation behavior and thermophysical properties of SiMoAl vermicular graphite cast iron for hot-end exhaust components. Isothermal oxidation tests at 800 degrees C and nonisothermal oxidation tests in a dry-air atmosphere were conducted on SiMo nodular iron, along with two SiMoAl vermicular graphite cast iron variants alloyed with 3.5 wt% Al and 4.8 wt% Al. The investigations revealed the formation of a thin duplex layer of oxide scale, consisting of an iron-rich external oxide layer and continuous aluminum oxide at the metal/oxide interface. Although aluminum oxide acted as a protective barrier by impeding the solid-state diffusion of oxygen, severe subsurface oxidation was observed due to the interconnected vermicular graphite covered by aluminum oxides after decarburization. Furthermore, based on nonisothermal oxidation experiments, the effective activation energy of oxidation was found to be significantly increased by the addition of aluminum, even though the oxidation activation energies of SiMoAl samples exhibited small changes in comparison to each other. Additionally, thermophysical analysis demonstrated a substantial decrease in the thermal conductivity and a slight increase in the thermal expansion with the addition of aluminum.
dc.description.sponsorshipIstanbul Technical University
dc.description.sponsorshipThe authors would like to thank Cem Kincal from Istanbul Technical University for their support on thermal characterization.
dc.identifier.doi10.3390/met14050574
dc.identifier.doi10.3390/met14050574
dc.identifier.issn2075-4701
dc.identifier.issue5
dc.identifier.scopus2-s2.0-85194229764
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.3390/met14050574
dc.identifier.urihttps://hdl.handle.net/11411/10705
dc.identifier.volume14
dc.identifier.wosWOS:001231744300001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofMetals
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20260402
dc.snmzKA_Scopus_20260402
dc.subjectSimoal Vermicular Graphite Cast Iron
dc.subjectHigh-Temperature Oxidation
dc.subjectActivation Energy Of Oxidation
dc.subjectThermal Conductivity
dc.subjectThermal Expansion
dc.titleHigh Temperature Oxidation Behavior of High Al-Si Alloyed Vermicular Graphite Cast Iron for Internal Combustion Engine's Hot-End Exhaust Components
dc.typeArticle

Dosyalar

Koleksiyon

Web of Science Indexed Publications
Scopus Indexed Publications