Effect of Mo substitution by W on high temperature embrittlement characteristics in duplex stainless steels

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dc.contributor.authorKim, SBko
dc.contributor.authorPaik, Kyung-Wookko
dc.contributor.authorKim, YGko
dc.date.accessioned2013-03-02T22:03:43Z-
dc.date.available2013-03-02T22:03:43Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued1998-06-
dc.identifier.citationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.247, no.1-2, pp.67 - 74-
dc.identifier.issn0921-5093-
dc.identifier.urihttp://hdl.handle.net/10203/75767-
dc.description.abstractThe influence of molybdenum substitution by tungsten on the impact toughness of the duplex stainless steel base metals aged at 850 degrees C was investigated. The impact toughness was related to the precipitation kinetics of intermetallic phases. Only sigma phase was observed in 3Mo-containing alloy, whereas chi phase and eta (Laves) phase besides sigma phase were precipitated in 3W-containing alloy. The chi and sigma phases were formed intergranularly, and the eta phase was formed intragranularly within a gamma grain. In 3W-containing alloy, the chi and eta phases were precipitated first, followed by the formation of the sigma phase. In addition, unlike 3Mo-containing alloy, the amount of the intermetallic phases (chi, eta and sigma) increased exceedingly slowly, resulting in the retardation of an embrittlement. The chi phase had a lesser effect on impact toughness compared with the sigma phase, due to its fine size and uniform distribution. Aging temperature of 850 degrees C in 3W-containing alloy was located at the upper part of the C-curve denoted by 10% of sigma/gamma intensity ratio in the time-temperature-transformation (TTT) diagram, indicating that sigma phase formation in 3W-containing alloy was delayed by the decrease in driving force for the formation of sigma phase. (C) 1998 Elsevier Science S.A. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE SA-
dc.subjectSIGMA-PHASE PRECIPITATION-
dc.subjectAGING BEHAVIOR-
dc.titleEffect of Mo substitution by W on high temperature embrittlement characteristics in duplex stainless steels-
dc.typeArticle-
dc.identifier.wosid000074723700009-
dc.identifier.scopusid2-s2.0-0032097922-
dc.type.rimsART-
dc.citation.volume247-
dc.citation.issue1-2-
dc.citation.beginningpage67-
dc.citation.endingpage74-
dc.citation.publicationnameMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING-
dc.contributor.localauthorPaik, Kyung-Wook-
dc.contributor.nonIdAuthorKim, SB-
dc.contributor.nonIdAuthorKim, YG-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorduplex stainless steel-
dc.subject.keywordAuthorimpact energy-
dc.subject.keywordAuthorintermetallic phase-
dc.subject.keywordAuthorprecipitation kinetics-
dc.subject.keywordPlusSIGMA-PHASE PRECIPITATION-
dc.subject.keywordPlusAGING BEHAVIOR-
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