
In this study, grain refinement efficiency of a new oxide master alloy based on MgAl2O4 was demonstrated in Al alloys. The grain size of the reference alloy was reduced by 50-60% with the addition of the master alloy and introduction of ultrasonic cavitation. While cooling rate has an influence on the grain size reduction, higher levels of addition of master alloy was found to be not effective in further reducing the grain size.
Oxide, Grain refinement, Casting, 620, Ultrasonic processing
Oxide, Grain refinement, Casting, 620, Ultrasonic processing
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