Decomposition of expanded austenite in AISI 316L stainless steel nitrided at 723K

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorPortland State University-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorFernandes, F. A.P.-
Autor(es): dc.creatorCasteletti, L. C.-
Autor(es): dc.creatorTotten, G. E.-
Autor(es): dc.creatorGallego, J.-
Data de aceite: dc.date.accessioned2025-08-21T16:21:54Z-
Data de disponibilização: dc.date.available2025-08-21T16:21:54Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2012-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1179/1749514812Z.00000000025-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/226975-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/226975-
Descrição: dc.descriptionExpanded austenite (γN), which can be produced during plasma nitriding of austenitic stainless steels, provides high levels of strength, toughness and corrosion resistance by comparison with traditional nitride layers. However, expanded austenite properties can be lost due to decomposition caused its thermodynamic metastability. In the present work, austenitic stainless AISI 316L steel was plasma nitrided at 723 K for 5 h at 500 Pa and microstructurally characterised by X-ray diffraction (XRD), and optical and transmission electron microscopy (TEM) which confirmed the presence of fcc expanded austenite with a lattice parameter up to 9·5% larger than untreated austenite. TEM analyses of thin foils showed that fine nitrides were formed in the γN layer and some areas were observed with a singular lamellar morphology very similar to the pearlite colonies found in carbon steels. Selected area electron diffraction (SAED) analysis suggests that these areas are composed of bcc ferrite and cubic chromium nitrides produced after a localised decomposition of the expanded austenite layer. Amorphous expanded austenite was observed in some areas of the investigated samples. The occurrence of γN decomposition was associated with microsegregation of ferrite stabilisers (Cr, Mo) and depletion of an austenite stabiliser (Ni) in localised regions of the expanded austenite layer. © 2012 IHTSE Partnership.-
Descrição: dc.descriptionDepartment of Materials Engineering São Carlos School of Engineering University of São Paulo, São Paulo, SP-
Descrição: dc.descriptionDepartment of Mechanical and Materials Engineering Portland State University, Portland, OR-
Descrição: dc.descriptionDepartment of Mechanical Engineering Univ Estadual Paulista- UNESP at IIha Solteira, IIha Solteira, SP-
Descrição: dc.descriptionDepartment of Mechanical Engineering Univ Estadual Paulista- UNESP at IIha Solteira, IIha Solteira, SP-
Formato: dc.format103-106-
Idioma: dc.languageen-
Relação: dc.relationInternational Heat Treatment and Surface Engineering-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAmorphous regions-
Palavras-chave: dc.subjectAustenitic stainless steel-
Palavras-chave: dc.subjectDecomposition-
Palavras-chave: dc.subjectEDS microanalysis-
Palavras-chave: dc.subjectExpanded austenite-
Palavras-chave: dc.subjectNitride formation-
Palavras-chave: dc.subjectPlasma nitriding-
Palavras-chave: dc.subjectTransmission electron microscopy-
Título: dc.titleDecomposition of expanded austenite in AISI 316L stainless steel nitrided at 723K-
Tipo de arquivo: dc.typelivro digital-
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