A study of microstructural evolution of Fe-18Cr-8Ni, Fe-17Cr-12Ni, and Fe-20Cr-25Ni stainless steels after mechanical alloying and annealing

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dc.contributor.authorKotan, Hasan
dc.contributor.authorDarling, Kris A.
dc.date.accessioned2024-02-23T14:13:07Z
dc.date.available2024-02-23T14:13:07Z
dc.date.issued2018
dc.departmentNEÜen_US
dc.description.abstractIn this study, high-energy mechanical alloying technique was used to produce nanocrystalline stainless steels of three different compositions from elemental powders. The microstructural evolution (grain growth and phase transformation) as a function of alloy compositions and annealing temperatures were investigated by room and high temperature x-ray diffraction experiments, transmission electron microscopy and focused ion beam microscopy. The results revealed that stainless steels with low nickel content (i.e., Fe-18Cr-8Ni) underwent a deformation-induced martensitic transformation during room temperature mechanical alloying. Deformation induced martensitic transformation with increasing nickel content (i.e., Fe-17Cr-12Ni and Fe-20Cr-25Ni) would not be possible by room temperature milling but was created by high strain rate cryogenic processing, the degree to which was compositional dependent. Post process annealing induced the reverse transformation from martensite-to-austenite the ratio of which was found to be a factor of alloy composition and annealing temperature. The real time in-situ x-ray studies showed that the martensite-to-austenite reverse transformation was completed at around 600 degrees C and 800 degrees C for Fe-18Cr-8Ni and Fe-20Cr-25Ni steels, respectively. Microscopy studies revealed a significant enhancement in the resistance to grain growth for Fe-17Cr-12Ni steel over other compositions at elevated temperatures as high as 1200 degrees C. As such, cryogenic processing following by reverse martensitic transformation of high Ni containing alloys provides a pathway for developing higher heat resistant stainless steel alloys.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.matchar.2018.02.001
dc.identifier.endpage194en_US
dc.identifier.issn1044-5803
dc.identifier.issn1873-4189
dc.identifier.scopus2-s2.0-85042028898en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage186en_US
dc.identifier.urihttps://doi.org/10.1016/j.matchar.2018.02.001
dc.identifier.urihttps://hdl.handle.net/20.500.12452/12318
dc.identifier.volume138en_US
dc.identifier.wosWOS:000428483400021en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Incen_US
dc.relation.ispartofMaterials Characterizationen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectStainless Steelsen_US
dc.subjectMartensitic Transformationen_US
dc.subjectReverse Transformationen_US
dc.subjectHigh Temperature X-Ray Diffractionen_US
dc.subjectGrain Growthen_US
dc.subjectMechanical Alloyingen_US
dc.titleA study of microstructural evolution of Fe-18Cr-8Ni, Fe-17Cr-12Ni, and Fe-20Cr-25Ni stainless steels after mechanical alloying and annealingen_US
dc.typeArticleen_US

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