Effect of Ultrasounds during the Solidification Process of the A357 Aluminium Alloy

Abstract:

It is known that ultrasonic waves promote nucleation and globulization of solid particles in 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 α 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.

• Periodical: Solid State Phenomena (Volumes 192-193)
• Pages: 428-432
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.192-193.428
• Online since: October 2012
• Authors: Antonio Forn, Manel da Silva, Maite Teresa Baile, Josep A. Picas, Antolí Fauria
• Keywords: A357 Aluminum Alloy, Aluminium Alloy, Semi-Solid Processing, Solid Fraction, Ultrasound (US)

References

[1] M. T. Baile, Estudio de la conformación de componentes de Aluminio-Silicio en estado semisólido. Tesis Doctoral. Universitat Politècnica de Catalunya (2005).

DOI: 10.3926/ege2020

[2] M. Campillo, M. T. Baile, S. Menargues and A. Forn, 13th ESAFORM European Scientific Association for Material Forming, Italy, (2010).

[3] S. Menargues, M. Campillo, M. T. Baile, J.A. Picas and A. Forn , International Journal of Material Forming, (2009),Vols 2, Suppl. 1, pp.769-772

DOI: 10.1007/s12289-009-0599-1

[4] G.I. Eskin, Ultrasonic Treatment of Light Alloy Melts, Gordon & Breach, Amsterdam (1998).

[5] G.I. Eskin. Tratamiento ultrasónico de aluminio fundido, Metallurgiya, Moscow, (1965) (in rushian).

[6] A. Pola, A. Arrighini and R, Roberti, Solid State Phenom., Vol. 141-143 (2008), pp.481-486.

DOI: 10.4028/www.scientific.net/ssp.141-143.481

[7] W. Khalifa, Y. Tsunekawa, M. Okumiya, Solid State Phenom, Vol. 141-143 (2008), pp.755-760.

[8] M. da Silva López, Análisis mecánico y microestructural de aleaciones ligeras producidas mediante New Rheocasting, Tesis doctoral, (2006).

[9] T. Pabel, H. Rockenschaub, Aluminium Technologie Schulungsunterlagen, Österreichisches Gießerei-Institut, (2005).