Microstructure Refinement by Y2O3 in Semisolid A356 Alloy
The semisolid A356 alloy slurry, which was grain-refined by Y2O3, was manufactured by low superheat pouring. The effects of grain-refine on the morphology and the grain size of the primary phase in semisolid A356 alloy were researched. The results indicated that semisolid A356 alloy contained Y2O3 with particle-like and rosette-like primary phases could be prepared by low superheat pouring. The grain size and particle morphology of primary phase in semisolid A356 alloy were markedly improved by Y2O3. The refining mechanism of Y2O3 on the morphology and the grain size of the primary α phase in semisolid A356 alloy was delved.
Z. Liu et al., "Microstructure Refinement by Y2O3 in Semisolid A356 Alloy", Advanced Materials Research, Vols. 311-313, pp. 666-669, 2011