Short-term creep properties and fracture surface of 18 Ni (300) maraging steel plasma nitrided

Página do item simplificado
dc.contributor.authorDos Reis A.G.
dc.contributor.authorReis D.A.P.
dc.contributor.authorAbdalla A.J.
dc.contributor.authorCouto A.A.
dc.contributor.authorOtubo J.
dc.date.accessioned2024-03-13T00:50:30Z
dc.date.available2024-03-13T00:50:30Z
dc.date.issued2017
dc.description.abstract© 2017 Universidade Federal de Sao Carlos. All rights reserved.Plasma 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.
dc.description.firstpage2
dc.description.lastpage9
dc.description.volume20
dc.identifier.doi10.1590/1980-5373-MR-2016-0744
dc.identifier.issn1516-1439
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/35821
dc.relation.ispartofMaterials Research
dc.rightsAcesso Aberto
dc.subject.otherlanguageCreep
dc.subject.otherlanguageFracture
dc.subject.otherlanguageMaraging
dc.subject.otherlanguagePlasma nitriding
dc.titleShort-term creep properties and fracture surface of 18 Ni (300) maraging steel plasma nitrided
dc.typeArtigo de evento
local.scopus.citations8
local.scopus.eid2-s2.0-85046015639
local.scopus.subjectContinuous layers
local.scopus.subjectFracture surfaces
local.scopus.subjectMaraging
local.scopus.subjectPlasma nitriding
local.scopus.subjectShort term creeps
local.scopus.subjectSolution-annealed
local.scopus.subjectSteady state creep rate
local.scopus.subjectSurface microhardness
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85046015639&origin=inward
Arquivos
Coleções
Artigo de evento