Abstract
Slope casting is one of the semi-solid casting techniques to get non-dendritic microstructure. Ultrasonic vibration during solidification causes degassing and grain refinement of casting. Therefore, in the present work combined effect of slope casting and ultrasonic mould vibration on microstructure and mechanical properties of Al-4wt%Cu-2wt%Mg were studied. The Casting was made in a stainless-steel mould into a non-contact type ultrasonic bath via a cooling slope. Microstructure and mechanical properties were studied and compared with conventionally cast the same alloy in a stainless steel mould. Refined microstructure and better mechanical properties obtained in slope casting in integration with ultrasonic vibration during solidification compared to conventional castings. Improvements in mechanical properties were observed due to non-dendritic and refined microstructure. The refinement in the microstructure is due to the high cooling ratein the ultrasonic bath compared to conventional casting.
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