Thermal stability, phase transformation and hardness of mechanically alloyed nanocrystalline Fe-18Cr-8Ni stainless steel with Zr and Y2O3 additions

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dc.contributor.authorKotan, Hasan
dc.date.accessioned2024-02-23T14:12:32Z
dc.date.available2024-02-23T14:12:32Z
dc.date.issued2018
dc.departmentNEÜen_US
dc.description.abstractNanocrystalline Fe-18Cr-8Ni (at%) stainless steels were produced by mechanical alloying from elemental powders with Zr and Y2O3 additions and subjected to annealing treatments at various temperatures. Xray diffraction experiments, transmission electron microscopy and focused ion beam microscopy were used to investigate the microstructural evolution as a function of alloy composition and annealing temperature. The dependence of hardness on the microstructure was utilized to study the mechanical changes with temperature. It was found that the resulting microstructures by mechanical alloying were bcc solid solution, the so-called alpha'-martensite structure whereas, depending on the composition and temperature, partial reverse transformation from martensite to austenite was induced by annealing. Asmilled nanocrystalline Fe-18Cr-8Ni stainless steel yielded grain growth upon annealing reaching to micron sizes at 1100 degrees C while addition of Zr and Y2O3 stabilized the microstructure below approximately 250 nm grain size and close to 5 GPa hardness after annealing at the same temperature. Such microstructural features may facilitate the consolidation process of nanocrystalline stainless steel powders as well as enabling the use of these materials at elevated temperatures. (C) 2018 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipTUBITAK [3501, 114M214]en_US
dc.description.sponsorshipThe research reported in this paper was supported by TUBITAK - 3501 under grant number 114M214.en_US
dc.identifier.doi10.1016/j.jallcom.2018.03.324
dc.identifier.endpage954en_US
dc.identifier.issn0925-8388
dc.identifier.issn1873-4669
dc.identifier.scopus2-s2.0-85044579105en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage948en_US
dc.identifier.urihttps://doi.org/10.1016/j.jallcom.2018.03.324
dc.identifier.urihttps://hdl.handle.net/20.500.12452/12097
dc.identifier.volume749en_US
dc.identifier.wosWOS:000432666200110en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofJournal Of Alloys And Compoundsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectStainless Steelsen_US
dc.subjectGrain Growthen_US
dc.subjectThermal Stabilityen_US
dc.subjectPhase Transformationen_US
dc.subjectMechanical Alloyingen_US
dc.subjectHardnessen_US
dc.titleThermal stability, phase transformation and hardness of mechanically alloyed nanocrystalline Fe-18Cr-8Ni stainless steel with Zr and Y2O3 additionsen_US
dc.typeArticleen_US

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