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Grain refinement in shape casting of aluminium alloys

Abstract The present review considers the grain refinement of aluminium alloy shaped castings and particularly Al–Si alloys. It examines the methods of grain refinement, benefits of grain refinement, procedures for assessing grain refinement, the efficiency of different refiners and factors affecting grain refinement. The review is intended to be of practical interest to the foundryman as well as providing an academic background to the subject.