Use of composition profiles near sigma phase for assessment of localized corrosion resistance in a duplex stainless steel

Página do item simplificado
dc.contributor.authorMagnabosco R.
dc.contributor.authorda Costa Morais L.
dc.contributor.authordos Santos D.C.
dc.date.accessioned2019-08-20T00:17:37Z
dc.date.available2019-08-20T00:17:37Z
dc.date.issued2019
dc.description.abstract© 2018 Elsevier LtdPitting corrosion potential of a UNS S31803 duplex stainless steel (DSS) heat treated between 750 °C and 850 °C at different aging times was related to the extent of the Cr- and Mo-depleted areas at sigma-ferrite and sigma-austenite interfaces, estimated using DICTRA® simulations. It is possible to describe the sigma formation kinetics using a model that assumes a spherical region of austenite, with radius equivalent to the mean intercept of austenite islands, surrounded by ferrite. Composition profiles at sigma-ferrite and sigma-austenite interfaces were calculated, allowing the evaluation of the degree of depletion in Cr and Mo at sigma interfaces. There is a reduction of pitting potential with increase of the degree of depletion, characterized as the weighted sum of depleted areas in Cr and Mo composition profiles, making possible the assessment of the localized corrosion resistance of aged DSS through simulation of sigma phase formation.
dc.description.firstpage126
dc.description.lastpage130
dc.description.volume64
dc.identifier.citationMAGNABOSCO, RODRIGO; DA COSTA MORAIS, LUARA; DOS SANTOS, DANIELLA CALUSCIO. Use of composition profiles near sigma phase for assessment of localized corrosion resistance in a duplex stainless steel. CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, v. 64, p. 126-130, 2019.
dc.identifier.doi10.1016/j.calphad.2018.12.004
dc.identifier.issn0364-5916
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/2300
dc.relation.ispartofCalphad: Computer Coupling of Phase Diagrams and Thermochemistry
dc.rightsAcesso Restrito
dc.subject.otherlanguageDICTRA
dc.subject.otherlanguageLocalized corrosion
dc.subject.otherlanguagePitting
dc.subject.otherlanguageSigma phase
dc.subject.otherlanguageStainless steel
dc.titleUse of composition profiles near sigma phase for assessment of localized corrosion resistance in a duplex stainless steel
dc.typeArtigo
fei.scopus.citations14
fei.scopus.eid2-s2.0-85058209567
fei.scopus.subjectComposition profile
fei.scopus.subjectCorrosion potentials
fei.scopus.subjectDICTRA
fei.scopus.subjectDuplex stainless steel
fei.scopus.subjectFormation kinetics
fei.scopus.subjectPitting potential
fei.scopus.subjectSigma phase
fei.scopus.subjectSigma phase formation
fei.scopus.updated2024-03-04
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85058209567&origin=inward
Arquivos
Coleções
Artigos