Ly. Wei et al., THE INTERGRANULAR MICROSTRUCTURE OF CAST MG-ZN AND MG-ZN-RARE EARTH ALLOYS, Metallurgical and materials transactions. A, Physical metallurgy andmaterials science, 26(8), 1995, pp. 1947-1955
The solidification path and microstructure of cast Mg-9Zn and Mg-8Zn-1
.5MM (misch metal) alloys have been investigated by a combination of t
hermal analysis and analytical electron microscopy. The addition of 1.
5 wt pct MM had a strong influence on the as-cast microstructure with
the introduction of new ''ternary'' interdendritic phases and structur
al modification of known binary phases. The temperature ranges for for
mation of these phases from the melt were identified, their crystal st
ructures determined, and their compositions analyzed. Products from eu
tectoidal decomposition of the interdendritic phase in the binary Mg-9
Zn alloy were also identified.