Abstract
An in situ Mg 2Si/Al–Si–Cu composite with semisolid structure was fabricated by cooling slope cast and partial remelting process. The as-cast microstructure, and effect of isothermal holding time on the morphology, size and shape factor of the grains were investigated. The results show that the morphology of primary Mg 2Si and α-Al grains in the composite are globular and/or elliptic after partial remelting process. The size and shape factor of α-Al grains increase with the isothermal holding time.
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