Structural characterization of plasma nitrided interstitial-free steel at different temperatures by SEM, XRD and Rietveld method

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dc.creatorAna Paula de Andrade Manfridini
dc.creatorGeralda Cristina Durães de Godoy
dc.creatorLeandro de Arruda Santos
dc.date.accessioned2023-07-26T17:22:55Z
dc.date.accessioned2025-09-08T23:20:08Z
dc.date.available2023-07-26T17:22:55Z
dc.date.issued2016
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1016/j.jmrt.2016.07.001
dc.identifier.issn2238-7854
dc.identifier.urihttps://hdl.handle.net/1843/57016
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Materials Research and Technology
dc.rightsAcesso Aberto
dc.subjectPlasma engineering
dc.subjectAço inoxidável
dc.subjectMetais - Superfície
dc.subject.otherPlasma nitriding
dc.subject.otherIF steels
dc.subject.otherStructural characterization
dc.subject.otherSurface properties
dc.titleStructural characterization of plasma nitrided interstitial-free steel at different temperatures by SEM, XRD and Rietveld method
dc.typeArtigo de periódico
local.citation.epage70
local.citation.issue1
local.citation.spage65
local.citation.volume6
local.description.resumoPlasma nitriding processes are widely used to improve surface properties of several steels and alloys. In this work, the formation of nitrides in the surface of plasma nitrided IF steels as a function of the temperature was investigated. Three cold-rolled IF steel plates were nitrided for 4 h after shot peening at three different temperatures: 450 °C, 475 °C, and 500 °C. The resultant nitrided layers were then characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Rietveld method, and hardness measurements. Through SEM images, it was possible to visualize two main sublayers: a compound layer and a diffusion zone. Through XRD, two phases were identified in the compound layer, which were ɛ-Fe2–3N and γ′-Fe4N. The diffusion zone presented a ferritic matrix with fine precipitates, possibly α″-Fe16N2. By Rietveld, the calculated quantity of γ′-Fe4N was 68 wt.% for the sample treated at 475 °C and 58 wt.% for the one treated at 500 °C. These values were consistent with the hardness measurements. Thus, it is suggested that higher nitriding temperatures facilitate the decreasing of γ′-Fe4N and, consequently, the increasing of ɛ-Fe2–3N in the compound layer.
local.identifier.orcidhttps://orcid.org/0000-0001-9172-6429
local.publisher.countryBrasil
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICA
local.publisher.departmentENGENHARIA - ESCOLA DE ENGENHARIA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S2238785416300266?via%3Dihub

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