The influence of various solutes on the as cast grain sizes of binary aluminium alloys has been examined using the ALCAN grain refinement assessment technique. Studies were performed with and without melt inoculation with an Al–Ti–B grain refiner. In both cases, grain size was found to depend significantly on the magnitude of the constitutional supercooling parameter P. In each case, grain sizefell rapidly to a plateau as P increased from zero to a value of ∼15–20.
MST/3109
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