Forn, A.; da Silva, M.; Baile Puig, Maria Teresa; Picas, J.A.; Fauria, A. Solid state phenomena Vol. 192 - 193, p. 428-432 DOI: 10.4028/www.scientific.net/SSP.192-193.428 Data de publicació: 2012-10 Article en revista
aluminium alloys. However, the studies performed up to date have been conducted, in the laboratory, using small volumes of aluminium. This article aims to establish the application of ultrasound effect in the A357 aluminium-silicon alloy in amounts of about 2 kg of material. The experiments have been conducted with different parameters of ultrasonic treatment, evaluating the microstructure of the slurry quenched from the semi-solid state. The globulization effect of aluminium a phase by ultrasounds is very effective in the area close to the ultrasonic horn tip and the transmission system, but its effect highly reduces in the regions far away from the source of ultrasonic waves.