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Type: Artigo de periódico
Title: The Correlation between Electrochemical Corrosion Resistance and Mechanical Strength of As-Cast Al-Cu and Al-Si Alloys
Author: Osorio, WR
Siqueira, CA
Santos, CA
Garcia, A
Abstract: The aim of the present work is to investigate the influence of solidification thermal parameters on the microstructural array of Al 5 wt.% Cu and Al 9 wt.% Si alloys castings with a view to developing correlations between the as-cast dendritic microstructure, the electrochemical corrosion resistance and the tensile mechanical strength. Considering the as-cast Al 5 wt.% Cu alloy, it was found that smaller secondary dendrite arm spacings (lambda(2)) increase both the ultimate tensile strength (UTS) and the corrosion resistance. For the Al 9 wt.% Si alloy, it is shown that the UTS also increase with the decrease in lambda(2), however, the corrosion resistance decreases. A combined plot of corrosion resistance and UTS as a function of lambda(2) is proposed with a view to determining an optimum range of secondary dendrite arm spacings which provides good balance between both properties.
Subject: Aluminum alloys
dendritic microstructure
mechanical strength
electrochemical corrosion resistance
Country: Sérvia
Editor: Electrochemical Science Group
Citation: International Journal Of Electrochemical Science. Electrochemical Science Group, v. 6, n. 12, n. 6275, n. 6289, 2011.
Rights: fechado
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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