Abstract
In this article, a new method for the production of nondendritic semisolid ZA27 alloy available for thixoforming was developed. The results indicated that a semisolid microstructure with small and spherical primary particles could be obtained when the alloy had been treated for 3 h at 370°C and then partially remelted at semisolid temperature of 460°C. This method could not only overcome some inevitable shortcomings resulting from using some present popular approaches but also simplify the procedure of thixoforming. The coarsening of dendritic arms through merging during solid solution treatment and then separating from the dendrites during partial remelting were the main methods by which such a microstructure was formed.
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