Abstract
Abstract Experiments were carried out to evaluate the effect of solute elements on grain refinement in aluminum based hypoeutectic alloys. Grain sizes of the as-cast structures were measured. The measured grain sizes were plotted vs. the undercooling parameter, P , the growth restriction factor, Q , and the solidification interval, Δ T , of the alloys. The results indicated that grain sizes decrease monotonically with increasing Δ T over the whole range of the hypoeutectic compositions whereas the relationships between the grain size and P or Q are “V” type curves.
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