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The grain refining response of Al and Al-7Si alloy has been studied with various Al-Ti, Al-B and Al-Ti-B master alloys at different addition levels. The results show that Al-B and B rich Al-Ti-B master alloys cannot grain refine Al, while they are efficient grain refiners to Al-7Si alloy. The level of grain refinement saturates after 0.03% of Ti or B for most of the master alloys studied both at short...
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