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http://dx.doi.org/10.12656/jksht.2011.24.2.082

Effects of Bi on Mg2Si Modification and Mechanical Properties of Mg-Al-Si Alloy  

Jun, Joong-Hwan (Advanced Fusion Process R&D Group, Korea Institute of Industrial Technology)
Publication Information
Journal of the Korean Society for Heat Treatment / v.24, no.2, 2011 , pp. 82-86 More about this Journal
Abstract
The influences of Bi addition on morphological modification of $Mg_2Si$ phase and mechanical properties were investigated in Mg-7%Al-0.5%Si casting alloy. It was found that the addition of 0.3%Bi changed the $Mg_2Si$ morphology from coarse Chinese script type to polygonal type, and significantly decreased the size to ~5 ${\mu}m$ or less with the increase of number density. The modification of $Mg_2Si$ phase by the addition of Bi resulted in the improvement of tensile properties of the Mg-Al-Si alloy at RT and $175^{\circ}C$.
Keywords
Mg-Al-Si alloy; Bi; $Mg_2Si$; Modification;
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