Short-term Creep Properties and Fracture Surface of 18 Ni (300) Maraging Steel Plasma Nitrided

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dc.citation.volume20
dc.contributor.authordos Reis, Adriano Goncalves
dc.contributor.authorPereira Reis, Danieli Aparecida [UNIFESP]
dc.contributor.authorAbdalla, Antonio Jorge
dc.contributor.authorCouto, Antonio Augusto
dc.contributor.authorOtubo, Jorge [UNIFESP]
dc.coverageSao Carlos
dc.date.accessioned2020-07-17T14:03:17Z
dc.date.available2020-07-17T14:03:17Z
dc.date.issued2017
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 mu m layer composed of epsilon-Fe-3 N and gamma'-N-Fe-4 N 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 (epsilon(s)) 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 45 degrees shear lip. Nitrided sample presented a reduced ductility, associated to the hard surface layer.en
dc.description.affiliationUniv Estadual Paulista Unesp, Inst Ciencia & Tecnol, Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationIPEN, Sao Paulo, SP, Brazil
dc.description.affiliationUniv Fed Sao Paulo UNIFESP, Inst Ciencia & Tecnol, Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationITA, Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationIEAv, Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationUPM, Sao Paulo, SP, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo UNIFESP, Inst Ciencia & Tecnol, Sao Jose Dos Campos, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipCNPq
dc.description.sponsorshipCAPES
dc.description.sponsorshipLCS/LNNano/CNPEM (AFM)
dc.description.sponsorshipFAPESP
dc.description.sponsorshipFINEP-PROINFRA
dc.description.sponsorshipIDCNPq: 141274/2013-1
dc.description.sponsorshipIDCNPq: 403070/2016-3
dc.description.sponsorshipIDCAPES: 014/08
dc.format.extent2-9
dc.identifierhttp://dx.doi.org/10.1590/1980-5373-MR-2016-0744
dc.identifier.citationMaterials Research-Ibero-American Journal Of Materials. Sao Carlos, v. 20, p. 2-9, 2017.
dc.identifier.doi10.1590/1980-5373-MR-2016-0744
dc.identifier.fileS1516-14392017000800002.pdf
dc.identifier.issn1516-1439
dc.identifier.scieloS1516-14392017000800002
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/55286
dc.identifier.wosWOS:000430187600002
dc.language.isoeng
dc.publisherUniv Fed Sao Carlos, Dept Engenharia Materials
dc.relation.ispartofMaterials Research-Ibero-American Journal Of Materials
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectmaragingen
dc.subjectcreepen
dc.subjectplasma nitridingen
dc.subjectfractureen
dc.titleShort-term Creep Properties and Fracture Surface of 18 Ni (300) Maraging Steel Plasma Nitrideden
dc.typeinfo:eu-repo/semantics/article
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