Experimental analysis of the columnar-to-equiaxed transition in directionally solidified Al-Ni and Al-Sn alloys

dc.creatorCante, MV
dc.creatorCruz, KS
dc.creatorSpinelli, JE
dc.creatorCheung, N
dc.creatorGarcia, A
dc.date2007
dc.dateMAY
dc.date2014-11-18T10:19:39Z
dc.date2015-11-26T17:49:17Z
dc.date2014-11-18T10:19:39Z
dc.date2015-11-26T17:49:17Z
dc.date.accessioned2018-03-29T00:32:19Z
dc.date.available2018-03-29T00:32:19Z
dc.identifierMaterials Letters. Elsevier Science Bv, v. 61, n. 41984, n. 2135, n. 2138, 2007.
dc.identifier0167-577X
dc.identifierWOS:000246158300003
dc.identifier10.1016/j.matlet.2006.08.032
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/66338
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/66338
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/66338
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1289336
dc.descriptionExperiments were carried out to investigate the columnar-to-equiaxed transition (CET) during the upward vertical directional solidification of hypocutectic Al-Ni and Al-Sn alloys. For the growth conditions examined both the thermal and solutal profiles inside the mushy zone and in the overlying melt ahead of the dendrite tips are expected to be stable, since the solute enrichment increases the melt density, and no solute movement induced by convection will affect the CET. From the experimental thermal profiles, tip cooling rates, tip growth rates and thermal gradients have been determined. It was found that the CET occurs for a critical value of cooling rate, with the columnar growth prevailing throughout the casting for cooling rates higher than such critical value, which for a particular binary alloy system is independent of the solute concentration in the hypoeutectic range. For Al-Sn and Al-Ni alloys the critical cooling rates were found to be 0.30 K/s and 0.16 K/s, respectively. (c) 2006 Elsevier B.V. All rights reserved.
dc.description61
dc.description41984
dc.description2135
dc.description2138
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationMaterials Letters
dc.relationMater. Lett.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectAl-Ni and Al-Sn alloys
dc.subjectmacrostructure
dc.subjectcolumnar-to-equiaxed transition
dc.subjectdirectional solidification
dc.subjectPb Alloys
dc.subjectMelt Convection
dc.subjectSi Alloys
dc.subjectCu Alloys
dc.subjectGrowth
dc.titleExperimental analysis of the columnar-to-equiaxed transition in directionally solidified Al-Ni and Al-Sn alloys
dc.typeArtículos de revistas


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