Effect of Rare Earth Metals on the Microstructure of Al-Si Based Alloys
AbstractThe present study was performed on A356 alloy [Al-7 wt %Si 0.0.35 wt %Mg]. To that La and Ce were added individually or combined up to 1.5 wt % each. The results show that these rare earth elements affect only the alloy melting temperature with no marked change in the temperature of Al-Si eutectic precipitation. Additionally, rare earth metals have no modification effect up to 1.5 wt %. In addition, La and Ce tend to react with Sr leading to modification degradation. In order to achieve noticeable modification of eutectic Si particles, the concentration of rare earth metals should exceed 1.5 wt %, which simultaneously results in the precipitation of a fairly large volume fraction of insoluble intermetallics. The precipitation of these complex intermetallics is expected to have a negative effect on the alloy performance. View Full-Text
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Alkahtani, S.A.; Elgallad, E.M.; Tash, M.M.; Samuel, A.M.; Samuel, F.H. Effect of Rare Earth Metals on the Microstructure of Al-Si Based Alloys. Materials 2016, 9, 45.
Alkahtani SA, Elgallad EM, Tash MM, Samuel AM, Samuel FH. Effect of Rare Earth Metals on the Microstructure of Al-Si Based Alloys. Materials. 2016; 9(1):45.Chicago/Turabian Style
Alkahtani, Saleh A.; Elgallad, Emad M.; Tash, Mahmoud M.; Samuel, Agnes M.; Samuel, Fawzy H. 2016. "Effect of Rare Earth Metals on the Microstructure of Al-Si Based Alloys." Materials 9, no. 1: 45.
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