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dc.contributor.authorDos Reis, Adriano Gonçalves [UNESP]
dc.contributor.authorReis, Danieli Aparecida Pereira
dc.contributor.authorAbdalla, Antônio Jorge
dc.contributor.authorCouto, Antônio Augusto
dc.contributor.authorOtubo, Jorge
dc.date.accessioned2018-12-11T16:53:03Z
dc.date.available2018-12-11T16:53:03Z
dc.date.issued2017-01-01
dc.identifierhttp://dx.doi.org/10.1590/1980-5373-MR-2016-0744
dc.identifier.citationMaterials Research, v. 20, p. 2-9.
dc.identifier.issn1516-1439
dc.identifier.urihttp://hdl.handle.net/11449/170936
dc.description.abstractPlasma nitriding of a solution annealed and aged 300 grade maraging steel was studied aiming to increase the creep resistance. The surface microhardness reached 1,140 HV, producing 50 μm layer composed of ε-Fe3N and γ'-Fe4N nitrides at the uppermost sample layer. The inner core remained unaltered presenting typical plate-like martensite microstructure of maraging steels with average microhardness of 604 HV. Surface RMS roughness in the nanometric scale increase from 52 nm to 71 nm. The continuous layer of iron nitrides seems to behave as a barrier for oxidation and for inward oxygen diffusion improving the creep resistance by reducing the steady-state creep rate (εs) in 52-65% when compared with the literature results. Dominant creep mechanism is controlled by dislocations climb. Fracture surfaces of specimens presented ductile failure consisting of equiaxed and bi-modal dimples in the fibrous zone surrounded by 45ºshear lip. Nitrided sample presented a reduced ductility, associated to the hard surface layer.en
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipFinanciadora de Estudos e Projetos
dc.format.extent2-9
dc.language.isoeng
dc.relation.ispartofMaterials Research
dc.sourceScopus
dc.subjectCreep
dc.subjectFracture
dc.subjectMaraging
dc.subjectPlasma nitriding
dc.titleShort-term creep properties and fracture surface of 18 Ni (300) maraging steel plasma nitrideden
dc.typeTrabalho apresentado em evento
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionInstituto de Pesquisas Energéticas e Nucleares - IPEN
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionInstituto Tecnologico de Aeronautica - ITA
dc.contributor.institutionInstituto de Estudos Avançados - IEAv
dc.contributor.institutionUniversidade Presbiteriana Mackenzie - UPM
dc.description.affiliationUniversidade Estadual Paulista (Unesp) Instituto de Ciência e Tecnologia
dc.description.affiliationInstituto de Pesquisas Energéticas e Nucleares - IPEN
dc.description.affiliationInstituto de Ciência e Tecnologia Universidade Federal de São Paulo - UNIFESP
dc.description.affiliationInstituto Tecnologico de Aeronautica - ITA
dc.description.affiliationInstituto de Estudos Avançados - IEAv
dc.description.affiliationUniversidade Presbiteriana Mackenzie - UPM
dc.description.affiliationUnespUniversidade Estadual Paulista (Unesp) Instituto de Ciência e Tecnologia
dc.identifier.doi10.1590/1980-5373-MR-2016-0744
dc.identifier.scieloS1516-14392017000800002
dc.rights.accessRightsAcesso aberto
dc.description.sponsorshipIdCAPES: 014/08
dc.description.sponsorshipIdCNPq: 141274/2013-1
dc.description.sponsorshipIdCNPq: 403070/2016-3
dc.identifier.scopus2-s2.0-85046015639
dc.identifier.fileS1516-14392017000800002.pdf
dc.relation.ispartofsjr0,398
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