Austenitic-ferritic stainless steel containing niobium

Detalhes bibliográficos
Autor(a) principal: Itman Filho,André
Data de Publicação: 2013
Outros Autores: Cardoso,Wandercleiton da Silva, Gontijo,Leonardo Cabral, Silva,Rosana Vilarim da, Casteletti,Luiz Carlos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: REM. Revista Escola de Minas (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672013000400010
Resumo: The austenitic-ferritic stainless steels present a better combination of mechanical properties and stress corrosion resistance than the ferritic or austenitic ones. The microstructures of these steels depend on the chemical compositions and heat treatments. In these steels, solidification starts at about 1450ºC with the formation of ferrite, austenite at about 1300ºC and sigma phase in the range of 600 to 950ºC.The latter undertakes the corrosion resistance and the toughness of these steels. According to literature, niobium has a great influence in the transformation phase of austenitic-ferritic stainless steels. This study evaluated the effect of niobium in the microstructure, microhardness and charge transfer resistance of one austenitic-ferritic stainless steel. The samples were annealed at 1050ºC and aged at 850ºC to promote formation of the sigma phase. The corrosion testes were carried out in artificial saliva solution. The addition of 0.5% Nb in the steel led to the formation of the Laves phase.This phase, associated with the sigma phase, increases the hardness of the steel, although with a reduction in the values of the charge transfer resistance.
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spelling Austenitic-ferritic stainless steel containing niobiumAustenitic-ferritic stainless steelssigma phaseLaves phasecharge transfer resistanceThe austenitic-ferritic stainless steels present a better combination of mechanical properties and stress corrosion resistance than the ferritic or austenitic ones. The microstructures of these steels depend on the chemical compositions and heat treatments. In these steels, solidification starts at about 1450ºC with the formation of ferrite, austenite at about 1300ºC and sigma phase in the range of 600 to 950ºC.The latter undertakes the corrosion resistance and the toughness of these steels. According to literature, niobium has a great influence in the transformation phase of austenitic-ferritic stainless steels. This study evaluated the effect of niobium in the microstructure, microhardness and charge transfer resistance of one austenitic-ferritic stainless steel. The samples were annealed at 1050ºC and aged at 850ºC to promote formation of the sigma phase. The corrosion testes were carried out in artificial saliva solution. The addition of 0.5% Nb in the steel led to the formation of the Laves phase.This phase, associated with the sigma phase, increases the hardness of the steel, although with a reduction in the values of the charge transfer resistance.Escola de Minas2013-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672013000400010Rem: Revista Escola de Minas v.66 n.4 2013reponame:REM. Revista Escola de Minas (Online)instname:Escola de Minasinstacron:ESCOLA DE MINAS10.1590/S0370-44672013000400010info:eu-repo/semantics/openAccessItman Filho,AndréCardoso,Wandercleiton da SilvaGontijo,Leonardo CabralSilva,Rosana Vilarim daCasteletti,Luiz Carloseng2015-07-28T00:00:00Zoai:scielo:S0370-44672013000400010Revistahttp://www.scielo.br/remhttps://old.scielo.br/oai/scielo-oai.phpeditor@rem.com.br1807-03530370-4467opendoar:2015-07-28T00:00REM. Revista Escola de Minas (Online) - Escola de Minasfalse
dc.title.none.fl_str_mv Austenitic-ferritic stainless steel containing niobium
title Austenitic-ferritic stainless steel containing niobium
spellingShingle Austenitic-ferritic stainless steel containing niobium
Itman Filho,André
Austenitic-ferritic stainless steels
sigma phase
Laves phase
charge transfer resistance
title_short Austenitic-ferritic stainless steel containing niobium
title_full Austenitic-ferritic stainless steel containing niobium
title_fullStr Austenitic-ferritic stainless steel containing niobium
title_full_unstemmed Austenitic-ferritic stainless steel containing niobium
title_sort Austenitic-ferritic stainless steel containing niobium
author Itman Filho,André
author_facet Itman Filho,André
Cardoso,Wandercleiton da Silva
Gontijo,Leonardo Cabral
Silva,Rosana Vilarim da
Casteletti,Luiz Carlos
author_role author
author2 Cardoso,Wandercleiton da Silva
Gontijo,Leonardo Cabral
Silva,Rosana Vilarim da
Casteletti,Luiz Carlos
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Itman Filho,André
Cardoso,Wandercleiton da Silva
Gontijo,Leonardo Cabral
Silva,Rosana Vilarim da
Casteletti,Luiz Carlos
dc.subject.por.fl_str_mv Austenitic-ferritic stainless steels
sigma phase
Laves phase
charge transfer resistance
topic Austenitic-ferritic stainless steels
sigma phase
Laves phase
charge transfer resistance
description The austenitic-ferritic stainless steels present a better combination of mechanical properties and stress corrosion resistance than the ferritic or austenitic ones. The microstructures of these steels depend on the chemical compositions and heat treatments. In these steels, solidification starts at about 1450ºC with the formation of ferrite, austenite at about 1300ºC and sigma phase in the range of 600 to 950ºC.The latter undertakes the corrosion resistance and the toughness of these steels. According to literature, niobium has a great influence in the transformation phase of austenitic-ferritic stainless steels. This study evaluated the effect of niobium in the microstructure, microhardness and charge transfer resistance of one austenitic-ferritic stainless steel. The samples were annealed at 1050ºC and aged at 850ºC to promote formation of the sigma phase. The corrosion testes were carried out in artificial saliva solution. The addition of 0.5% Nb in the steel led to the formation of the Laves phase.This phase, associated with the sigma phase, increases the hardness of the steel, although with a reduction in the values of the charge transfer resistance.
publishDate 2013
dc.date.none.fl_str_mv 2013-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672013000400010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672013000400010
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0370-44672013000400010
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Escola de Minas
publisher.none.fl_str_mv Escola de Minas
dc.source.none.fl_str_mv Rem: Revista Escola de Minas v.66 n.4 2013
reponame:REM. Revista Escola de Minas (Online)
instname:Escola de Minas
instacron:ESCOLA DE MINAS
instname_str Escola de Minas
instacron_str ESCOLA DE MINAS
institution ESCOLA DE MINAS
reponame_str REM. Revista Escola de Minas (Online)
collection REM. Revista Escola de Minas (Online)
repository.name.fl_str_mv REM. Revista Escola de Minas (Online) - Escola de Minas
repository.mail.fl_str_mv editor@rem.com.br
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