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Type: Artigo de periódico
Title: Effect of magnesium content on thermal and structural parameters of Al-Mg alloys directionally solidified
Author: Rodrigues, JRP
Melo, MDNM
dos Santos, RG
Abstract: In this study, the influence of magnesium content on thermal and structural parameters during the unsteady-state unidirectional solidification of Al-Mg alloys is analyzed. Using a special device, Al-Mg alloys containing 5, 10, and 15 wt% Mg were submitted to unidirectional solidification. Using a data acquisition system, the temperature variations along the casting during solidification were measured. From these results, the variations of solidification parameters as growth rate of dendrite tips, thermal gradient, cooling rate, and local solidification time were determined. The variation of global heat transfer coefficient at metal/mould interface was estimated through the adjustment of experimental temperature variation close to the interface and numerical predictions. Primary and secondary dendrite arms spacing variations during solidification were measured by optical microscopy. From these results, comparative analysis were developed to determine the influence of magnesium content.
Country: EUA
Editor: Springer
Citation: Journal Of Materials Science. Springer, v. 45, n. 9, n. 2285, n. 2295, 2010.
Rights: fechado
Identifier DOI: 10.1007/s10853-009-4190-4
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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