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In the present study, superheating treatment has been applied on A357reinforced with 0.5 wt. % (Composite 1) and 1.0 wt.% (Composite 2) continuousstainless steel composite. In Composite 1 the microstructure displayed poorbonding between matrix and reinforcement interface. Poor bonding associatedwith large voids also can be seen in Composite 1. The results also showed thatcoarser eutectic silicon (Si) particles were less intensified around thematrix-reinforcement interface. From energy dispersive spectrometry (EDS)elemental mapping, it was clearly shown that the distribution of eutectic Siparticles were less concentrated at poor bonding regions associated with largevoids. Meanwhile in Composite 2, the microstructure displayed good bondingcombined with more concentrated finer eutectic Si particles around thematrix-reinforcement interface. From EDS elemental mapping, it was clearlyshowed more concentrated of eutectic Si particles were distributed at the goodbonding area. The superheating prior to casting has influenced themicrostructure and tends to produce finer, rounded and preferred oriented{\alpha}-Al dendritic structures.

The Effects of Superheating Treatment on Distribution of Eutectic Silicon Particles in A357-Continuous Stainless Steel Composite