EFFECT OF VIBRATIONS DURING SOLIDIFICATION OF CASTINGS

Abstract

The present investigation has been undertaken to explore the effects of low frequency vibrations during solidi-fication of comr-•ercial metals such as brass, aluminium and cast iron. Low frequency vibrations (18 - 51 cps) were apolied to solidifying melts of brass, aluminium and cast iron from a mechanical vibrator. Various theories relating to solidificatior of melts under dynamic condition have been discussed. The results obtained indicate that low frequency vibra-tions affect the grain size, although the variation is small. There has been a definite improvement in the tensile strength and hardness of the materials investigated.