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Type: Artigo de periódico
Title: High Cooling Rate Cells, Dendrites, Microstructural Spacings And Microhardness In A Directionally Solidified Al-mg-si Alloy
Author: Brito C.
Reinhart G.
Nguyen-Thi H.
Mangelinck-Noel N.
Cheung N.
Spinelli J.E.
Garcia A.
Abstract: Transient unidirectional solidification experiments have been carried out with an Al-3 wt%Mg-1 wt%Si alloy under cooling rates (T) in the range 0.2-45 K/s. A reverse cells > dendrites transition is shown to occur with the high-cooling rate cellular region associated with T > 2 K/s and the dendritic region with T < 0.8 K/s. Experimental growth laws correlating the cellular and dendritic spacings with the cooling rate are proposed. It is shown that the microhardness is directly influenced by both morphologies of the Al-rich matrix and by the relative fractions of Mg2Si and Fe bearing intermetallics that vary differently with the cooling rate.
Editor: Elsevier Ltd
Citation: Journal Of Alloys And Compounds. Elsevier Ltd, v. 636, n. , p. 145 - 149, 2015.
Rights: fechado
Identifier DOI: 10.1016/j.jallcom.2015.02.140
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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