Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/6999
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Type: Artigo de Periódico
Issue Date: Aug-2013
Authors: CARVALHO, Diego de Leon Brito
GUIMARÃES, Emanuelle Casseb
MOREIRA, Antonio Luciano Seabra
MOUTINHO, Daniel Joaquim da Conceição
DIAS FILHO, José Marcelino da Silva
ROCHA, Otávio Fernandes Lima da
Title: Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification
Citation: CARVALHO, Diego de Leon Brito et al. Characterization of the Al-3wt.%Si alloy in unsteady-state horizontal directional solidification. Materials Research, São Carlos, v. 16, n. 4, p. 874-883, ago. 2013. Disponível em: <http://www.scielo.br/pdf/mr/v16n4/aop_1600-12.pdf>. Acesso em: 13 nov. 2015. <http://dx.doi.org/10.1590/S1516-14392013005000072>.
Abstract: The main purpose of this paper is to investigate both the columnar to equiaxed transition and primary dendritic arm spacings of Al-3wt.%Si alloy during the horizontal directional solidification. The transient heat transfer coefficient at the metal-mold interface is calculated based on comparisons between the experimental thermal profiles in castings and the simulations provided by a finite difference heat flow program. Simulated curve of the interfacial heat transfer coefficient was used in another numerical solidification model to determine theoretical values of tip growth rates, cooling rates and thermal gradients that are associated with both columnar to equiaxed transition and primary dendritic arm spacings. A good agreement was observed between the experimental values of these thermal variables and those numerically simulated for the alloy examined. A comparative analysis is carried out between the experimental data of this work and theoretical models from the literature that have been proposed to predict the primary dendritic spacings. In this context, this study may contribute to the understanding of how to manage solidification operational parameters aiming at designing the microstructure of Al-Si alloys.
Keywords: Ligas Al-Si
Espaçamento dendrítico primário
Solidificação
Condições do estado instável
Ligas Al-Si
ISSN: 1516-1439
Appears in Collections:Artigos Científicos - FEM/ITEC

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