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엄정필,임수근,허보영 慶尙大學校生産技術硏究所 1995 生産技術硏究所論文集 Vol.11 No.-
Microstructure of Mg-1 ~ 6wt%Zn, Mg-1.5wt%Mn and Mg-2wt%Zn-1.5wt%Mn alloys have been investigated by means of hardness test, optical microscopy, scanning electron microscopy and energy dispersive spectroscopy. The Mg alloy castings have been casted into the metallic mold with room temperature, and cooling part of metallic mold have located in it's lower part. The microstructure of Mg-Zn cast alloys revealed MgZn compound around the secondary dendrite arms. Analysis by scanning electron microscopy/energy dispersive spectroscopy showed that the composition of MgZn compound was Mg-77wt%Zn, which corresponds with the value of Mg-74.5wt%Zn given by Clack and Rhines. The addition of Mn in Mg-Zn alloys refined the grain size in as-casted alloys. Manganese additions also increased the vickers hardness.