Influence of melt convection on dendritic spacings of downward unsteady-state directionally solidified Al-Cu alloys

dc.creatorSpinelli, JE
dc.creatorRosa, DA
dc.creatorFerreira, IL
dc.creatorGarcia, A
dc.date2004
dc.dateOCT 15
dc.date2014-11-15T06:01:12Z
dc.date2015-11-26T17:18:29Z
dc.date2014-11-15T06:01:12Z
dc.date2015-11-26T17:18:29Z
dc.date.accessioned2018-03-29T00:06:12Z
dc.date.available2018-03-29T00:06:12Z
dc.identifierMaterials Science And Engineering A-structural Materials Properties Microstructure And Processing. Elsevier Science Sa, v. 383, n. 2, n. 271, n. 282, 2004.
dc.identifier0921-5093
dc.identifierWOS:000224336600011
dc.identifier10.1016/j.msea.2004.06.021
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/80208
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/80208
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/80208
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1282674
dc.descriptionThe dendritic spacings are important microstructural parameters involved in solidification processes. They can affect not only microsegregation profiles but also the formation of secondary phases within interdendritic regions, which influences mechanical properties of cast structures. A small number of studies have been carried out in order to analyze the effects of melt convection within the interdendritic region or to verify the influence of growth direction in the dendritic arm spacings. In this work, a combined theoretical and experimental approach is developed to quantitatively determine solidification thermal variables such as transient metal/mold heat transfer coefficients, tip growth rates, thermal gradients, tip cooling rates and local solidification time during downward unsteady-state solidification of hypoeutectic Al-Cu alloys. These solidification thermal variables are correlated with dendritic spacings, which have been measured along cross and longitudinal sections of ingots solidified under downward unsteady-state heat-flow conditions. Predictive theoretical models for dendritic spacings have been compared with experimental observations. A comparison between upward and downward unsteady-state results for dendritic spacings has also been conducted. (C) 2004 Elsevier B.V. All rights reserved.
dc.description383
dc.description2
dc.description271
dc.description282
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationMaterials Science And Engineering A-structural Materials Properties Microstructure And Processing
dc.relationMater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectdownward unsteady-state solidification
dc.subjectdendrite arm spacings
dc.subjectdendritic growth models
dc.subjectAl-Cu alloys
dc.subjectPb-sn Alloys
dc.subjectMechanical-properties
dc.subjectBinary-alloys
dc.subjectInterdendritic Convection
dc.subjectMetallic Alloys
dc.subjectArm Spacings
dc.subjectSb Alloys
dc.subjectHeat-flow
dc.subjectMicrostructure
dc.subjectParameters
dc.titleInfluence of melt convection on dendritic spacings of downward unsteady-state directionally solidified Al-Cu alloys
dc.typeArtículos de revistas


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