Influenzce of the sigma phase formation in pitting potential of UNS s31803 duplex stainless steel in 0,6M NACL AGED at 850 E 900°C

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dc.contributor.authorDaniella Caluscio dos Santos
dc.contributor.authorRodrigo Magnabosco
dc.contributor.authorOrcidhttps://orcid.org/0000-0002-5875-5022
dc.contributor.authorOrcidhttps://orcid.org/0000-0003-0559-7224
dc.date.accessioned2023-08-26T23:49:40Z
dc.date.available2023-08-26T23:49:40Z
dc.date.issued2010-07-26
dc.description.abstractThe main purpose of this work is to analyze the mechanisms and kinetics of sigma phase formation of UNS S31803 stainless steel after isothermal aging between 850 e 900°C, evaluating the influence of sigma phase formation on pitting potential in 0.6M NaCl solution. Solution treated samples of the UNS S31803 duplex stainless steel were isotermically aged at 850°C or 900°C up to 360 h. The microstructural characterization of the samples was made through quantitative metallography, ferritscope analysis and Vickers microhardness. The cyclic polarization tests used to the determination of the pitting potential were conducted in polished samples. The electrochemical behavior of aged UNS S31803 duplex stainless steel in 0.6M NaCl solution is strongly dependent on the microstructure, since both changes in mechanisms and kinetics of sigma phase formation influenced the pitting potential of the material. Increasing aging time lead to the decrease of pitting potential, due to the formation of chromium impoverished regions. Oscillations in pitting potential values were noted due to the chromium redistribution enabled by easy diffusion of this element in high temperatures.
dc.description.firstpage3594
dc.description.lastpage3605
dc.description.volume4
dc.identifier.citationSANTOS, D. C. DOS; MAGNABOSCO, R. Influenzce of the sigma phase formation in pitting potential of UNS s31803 duplex stainless steel in 0,6M NACL AGED at 850 E 900°C. 65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010, p. 3594-3605, v. 4, jul, 2010.
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/4987
dc.relation.ispartof65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010
dc.rightsAcesso Restrito
dc.subject.otherlanguageDuplex stainless steel
dc.subject.otherlanguagePitting corrosion
dc.subject.otherlanguageSigma phase
dc.titleInfluenzce of the sigma phase formation in pitting potential of UNS s31803 duplex stainless steel in 0,6M NACL AGED at 850 E 900°C
dc.title.alternativeInfluência da formação de sigma no potencial de pite do aço inoxidável duplex UNS S31803 EM SOLUÇÃO 0,6M NaCl envelhecido A 850°C E 900°C
dc.typeArtigo de evento
fei.scopus.citations0
fei.scopus.eid2-s2.0-84893305870
fei.scopus.subjectCyclic polarization
fei.scopus.subjectDuplex stainless steel
fei.scopus.subjectElectrochemical behaviors
fei.scopus.subjectMicro-structural characterization
fei.scopus.subjectQuantitative metallography
fei.scopus.subjectSigma phase
fei.scopus.subjectSigma phase formation
fei.scopus.subjectVickers microhardness
fei.scopus.updated2024-07-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84893305870&origin=inward
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