AFS Library

EFFECT OF VIBRATION ON SOLIDIFICATION OF TRANSPARENT LIQUIDS AND AL-SI ALLOYS

19700793
Journal: AFS TRANSACTIONS 1970, p. 324-331
Author: A. Claro, J. Conrads & J. Fava

In an effort to obtain new data regarding the effect of vibration on casting structure, 2 new techniques were developed. The first was to use certain transparent liquids which crystallize like metals as models for showing vibration effects. The second was to solidify Al-Si alloys radially outward from a gas-cooled Cu tube immersed in a crucible. The effects of vibration were then evaluated by vibrating the tube instead of the mold and very long solidification times (20 min) were obtained to magnify the effects of vibration are 1) greatly increased precipitation of primary Si crystals of different shape near the cooling tube and 2) pronounced modification of the eutectic structures from a fan-like colony type to a random orientation of the Si phase.



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