Please use this identifier to cite or link to this item: http://repositorio.ufpa.br:8080/jspui/handle/2011/6998
metadata.dc.type: Artigo de Periódico
Issue Date: Apr-2014
metadata.dc.creator: CARVALHO, Diego de Leon Brito
MOREIRA, Antonio Luciano Seabra
MOUTINHO, Daniel Joaquim da Conceição
DIAS FILHO, José Marcelino da Silva
ROCHA, Otávio Fernandes Lima da
SPINELLI, José Eduardo
Title: The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys
Citation: CARVALHO, Diego de Leon Brito et al. The columnar to equiaxed transition of horizontal unsteady-state directionally solidified Al-Si alloys. Materials Research, São Carlos, v. 17, n. 2, p. 498-510, abr. 2014. Disponível em: <http://www.scielo.br/pdf/mr/v17n2/aop_matres_229013.pdf>. Acesso em: 13 nov. 2015. <http://dx.doi.org/10.1590/S1516-14392014005000015>.
Abstract: Experiments were conducted to investigate the influence of thermal parameters on the columnar to equiaxed transition during the horizontal unsteady-state directional solidification of Al-Si alloys. The parameters analyzed include the heat transfer coefficients, growth rates, cooling rates, temperature gradients and composition. A combined theoretical and experimental approach is developed to determine the solidification thermal variables considered. The increasing solute content in Al-Si alloys was not found to affect significantly the experimental position of the CET which occurred for cooling rates in the range between 0.35 and 0.64 K/s for any of three alloy compositions examined. A comparative analysis between the results of this work and those from the literature proposed to analyze the CET during upward vertical solidification of Al-Si alloys is reported and the results have shown that the end of the columnar region during horizontal directional solidification is abbreviated as a result of about six times higher thermal gradient than that verified during upward unidirectional solidification of alloys investigated.
Keywords: Colunar equiaxial de transição
Solidificação
Parâmetros térmicos
Condições do estado instável
Ligas Al-Si
ISSN: 1516-1439
metadata.dc.rights: Acesso Aberto
Appears in Collections:Artigos Científicos - FEM/ITEC

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