Microstructure of reaction zone in WCp/duplex stainless steels matrix composites processing by laser melt injection

dc.creatorDo Nascimento, AM
dc.creatorOcelik, V
dc.creatorIerardi, MCF
dc.creatorDe Hosson, JTM
dc.date2008
dc.dateFEB 15
dc.date2014-11-16T14:26:37Z
dc.date2015-11-26T16:23:30Z
dc.date2014-11-16T14:26:37Z
dc.date2015-11-26T16:23:30Z
dc.date.accessioned2018-03-28T23:04:42Z
dc.date.available2018-03-28T23:04:42Z
dc.identifierSurface & Coatings Technology. Elsevier Science Sa, v. 202, n. 10, n. 2113, n. 2120, 2008.
dc.identifier0257-8972
dc.identifierWOS:000253309800028
dc.identifier10.1016/j.surfcoat.2007.08.065
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/56881
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/56881
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/56881
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1268268
dc.descriptionThe laser melt injection (LMI) process has been used to create a metal matrix composite consisting of 80gm sized multi-grain WC particles embedded in three cast duplex stainless steels. The microstruture was investigated by scanning electron microscopy with integrated EDS and electron back-scatter diffraction/orientation imaging microscopy. In particular the search of the processing parameters, e.g. laser power density, laser beam scanning speed and powder flow rate, to obtain crack free and WCp containing surface layer, has been examined. Before the injection of ceramic particles into remelted surface layer, the influence of processing parameters of laser surface remelting on the microstructure and properties of selected duplex steels was also investigated. Although after simple laser surface remelting the austenitic phase is almost not present inside remelted layer, in the case of LMI the austenite was observed in vicinity of WC particles, due to increase of carbon content acting as austenite stabilizer. The diffusion of carbon in the reaction zone results also in a formation Of W2C phase in the neighborhood of WC particles with a strong orientation relationship between them. The maximum volume fraction of the particles achieved in the metal matrix composite layer was about 10% and a substantial increase in hardness was observed, i.e. 575 HV0.2 for the matrix with embedded particles in comparison to 290 HV0.2 for untreated cast duplex stainless steels. (c) 2007 Elsevier B.V. All rights reserved.
dc.description202
dc.description10
dc.description2113
dc.description2120
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationSurface & Coatings Technology
dc.relationSurf. Coat. Technol.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectlaser treatment
dc.subjectmetal matrix composite
dc.subjectelectron back-scatter diffraction
dc.subjectduplex stainless steel
dc.subjectSolidification Mode
dc.subjectWear-resistance
dc.subjectCoatings
dc.subjectClad
dc.subjectBehavior
dc.subjectLayers
dc.subjectWelds
dc.subjectDeposition
dc.subjectTi-6al-4v
dc.titleMicrostructure of reaction zone in WCp/duplex stainless steels matrix composites processing by laser melt injection
dc.typeArtículos de revistas


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