Intergranular oxidation of additively manufactured Ni-base alloy 625: The role of Si

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dc.contributor.authorChyrkin, A.
dc.contributor.authorNowak, W. J.
dc.contributor.authorGunduz, K. O.
dc.contributor.authorFedorova, I.
dc.contributor.authorSattari, M.
dc.contributor.authorFroitzheim, J.
dc.contributor.authorHalvarsson, M.
dc.date.accessioned2025-10-29T11:29:35Z
dc.date.issued2023
dc.departmentFakülteler, Temel Bilimler Fakültesi, Kimya Bölümü
dc.description.abstractAdditively manufactured (AM) Ni-base alloy 625 exposed in air and H2/H2O at 900 degrees C has been shown to suffer from intergranular oxidation attack unlike its conventionally manufactured (CM) variant. Modification of the AM microstructure via hot-rolling and heat-treatment did not alter the oxidation pattern. Detailed analysis of minor differences in chemical composition of AM and CM exposed the critical role of Si in oxidation protection of alloy 625. Experiments with model alloys as well as diffusion modeling confirmed the crucial role of a minimum Si concentration to form a SiO2 subscale preventing thereby intergranular oxidation attack.
dc.description.sponsorshipSwedish Energy Agency
dc.description.sponsorshipSwedish Strategic Foundation SSF [UKR22-0047]
dc.description.sponsorshipThis study was accomplished within the Swedish High Temperature Corrosion Centre (HTC) partly funded by the Swedish Energy Agency and its member companies (in this work Siemens Energy AB, AB Sandvik Materials Technology, Kanthal AB) . The authors also gratefully acknowledge Chalmers Materials Analysis Laboratory (CMAL) where the materials characterizations were carried out. Dr. D. Naumenko from Forschungszentrum Juelich GmbH, Juelich, Germany is kindly acknowledged for providing CM alloy 625. Anton Chyrkin acknowledges funding from the Swedish Strategic Foundation SSF, grant No. UKR22-0047. All persons who have made substantial contributions to the work reported in the manuscript (e.g., technical help, writing and editing assistance, general support) , but who do not meet the criteria for authorship, are named in the Acknowledgements and have given us their written permission to be named. If we have not included an Acknowledgements, then that indicates that we have not received substantial contributions from non -authors.
dc.identifier.doi10.1016/j.corsci.2023.111234
dc.identifier.issn0010-938X
dc.identifier.issn1879-0496
dc.identifier.scopus2-s2.0-85156188298
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.corsci.2023.111234
dc.identifier.urihttps://hdl.handle.net/20.500.14854/11144
dc.identifier.volume219
dc.identifier.wosWOS:001007570200001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofCorrosion Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20251020
dc.subjectNi -base alloys
dc.subjectAlloy 625
dc.subjectAdditive manufacturing
dc.subjectHigh-temperature corrosion
dc.subjectOxidation
dc.subjectIntergranular oxidation
dc.titleIntergranular oxidation of additively manufactured Ni-base alloy 625: The role of Si
dc.typeArticle

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