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http://dx.doi.org/10.7777/jkfs.2011.31.1.018

Effect of Fe and Mn Contents on the Tensile Property of Al-9%Si-0.3%Mg Alloy for High Pressure Die Casting  

Kim, Heon-Joo (Dept of Metallurgical Eng., Pukyong National Univ.)
Publication Information
Journal of Korea Foundry Society / v.31, no.1, 2011 , pp. 18-25 More about this Journal
Abstract
Effect of Fe and Mn contents on the tensile properties has been studied in Al-9wt%Si-0.3wt%Mg alloy. As Fe content of Al-9wt%Si-0.3wt%Mg-0.5wt%Mn alloy increased from 0.15wt% to 0.45wt%, tensile strength of as-cast alloy decreased from 192 MPa to 174 MPa, and elongation of the alloy also decreased from 4.8% to 4.2%. Decrease of these properties can be explained as the formation of plate shape, ${\beta}-Al_5FeSi$ phase with high Fe/Mn ratio of the alloy. However when Mn content of Al-9wt%Si-0.3wt%Mg-0.45wt%Fe alloy increased from 0.3wt% to 0.5wt%, tensile strength of T6 aged alloy increased from 265 MPa to 275 MPa, and elongation of the alloy increased from 2.3% to 3.6%. These improvements attribute to chinese script, ${\alpha}-Al_{15}(Mn,Fe)_3Si_2$ phase shape-modified from ${\beta}-Al_5FeSi$ phase with low Fe/Mn ratio of the alloy.
Keywords
Al-9%Si-0.3%Mg alloy; Tensile properties; ${\alpha}-Al_{15}(Min,Fe)_3Si_2$ phase ${\beta}-Al_5FeSi$ phase;
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Times Cited By KSCI : 1  (Citation Analysis)
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