Effect of in-situ formed oxide and carbide phases on microstructure and corrosion behavior of Zr/Y doped CoCrFeNi high entropy alloys prepared by mechanical alloying and spark plasma sintering

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dc.authorid0000-0002-8589-508X
dc.authorid0000-0001-9441-5175
dc.authorid0000-0003-0434-1518
dc.contributor.authorKotan, Hasan
dc.contributor.authorTekin, Mustafa
dc.contributor.authorBayatli, Aleyna
dc.contributor.authorBayrak, Kuebra Gurcan
dc.contributor.authorKocabas, Mustafa
dc.contributor.authorAyas, Erhan
dc.date.accessioned2026-02-12T21:05:32Z
dc.date.available2026-02-12T21:05:32Z
dc.date.issued2023
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractThe present work has examined the microstructural evolution, thermal stability, hardness, and corrosion behavior of Zr/Y doped CoCrFeNi HEAs prepared through high-energy mechanical alloying followed by spark plasma sintering (SPS) at 1100 degrees C. The achieved microstructures were investigated by XRD and TEM techniques. The results showed that investigated HEAs consist of an fcc solid solution of CoCrFeNi matrix with in-situ formed Cr-C carbides and Cr/Zr/Y based oxide phases. The SPS processing of CoCrFeNi yielded grain growth to 370 & PLUSMN; 60 nm, while 240 & PLUSMN; 160 nm grain size with bimodal grain size distribution and 165 & PLUSMN; 38 nm grain size were achieved with Zr and Y additions, respectively. The effects of microstructural changes on the hardness and corrosion behaviors of HEAs were also investigated. Compared with 372 & PLUSMN; 15 HV hardness of CoCrFeNi HEA, 445 & PLUSMN; 26 HV and 563 & PLUSMN; 58 HV hardness values were determined with Zr and Y doped HEAs, respectively. The increase in hardness is mainly ascribed to the precipitation strengthening of carbide and oxide phases as well as smaller grain sizes. The corrosion analysis showed that, although the achieved smaller grain sizes and the presence of different oxide types when dopped with Y and Zr impaired the corrosion resistance, the investigated HEAs have reasonable resistance to corrosion when compared to SS304 stainless steel.
dc.identifier.doi10.1016/j.intermet.2023.107998
dc.identifier.issn0966-9795
dc.identifier.issn1879-0216
dc.identifier.scopus2-s2.0-85165967422
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.intermet.2023.107998
dc.identifier.urihttps://hdl.handle.net/20.500.12885/7020
dc.identifier.volume162
dc.identifier.wosWOS:001049235400001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofIntermetallics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260212
dc.subjectHigh entropy alloys
dc.subjectMechanical alloying and milling
dc.subjectAlloy design
dc.subjectMicrostructure
dc.subjectGrain growth
dc.subjectOxidation
dc.titleEffect of in-situ formed oxide and carbide phases on microstructure and corrosion behavior of Zr/Y doped CoCrFeNi high entropy alloys prepared by mechanical alloying and spark plasma sintering
dc.typeArticle

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