Pericleous, Koulis A. ORCID: https://orcid.org/0000-0002-7426-9999, Bojarevics, Valdis ORCID: https://orcid.org/0000-0002-7326-7748, Djambazov, Georgi ORCID: https://orcid.org/0000-0001-8812-1269, Dybalska, Agnieszka, Griffiths, William and Tonry, Catherine ORCID: https://orcid.org/0000-0002-8214-0845 (2019) The contactless electromagnetic sonotrode. In: Tiryakioğlu, Murat, Griffiths, William and Jollyy, Mark, (eds.) Shape Casting: 7th International Symposium Celebrating Prof. John Campbell's 80th Birthday. The Minerals, Metals & Materials Series . Springer, Cham, Switzerland, pp. 239-252. ISBN 978-3030060336 (doi:10.1007/978-3-030-06034-3_23)

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Abstract

Ultrasonic pressure waves generated using a tuned electromagnetic induction coil, promote cavitation in alloy melts as an alternative to the immersed sonotrode technique. The method targets the same benefits offered by traditional UST (degassing, microstructure refinement, dispersion of particles), but without some of its drawbacks. The method is contactless, meaning it can be applied equally to high temperature/reactive melts, avoiding contamination due to probe erosion. Consequently, it is maintenance free. Due to induction stirring larger volumes of melt can be treated (a major limitation of the traditional method), as the liquid is forced to pass repeatedly through zones of cavitation activity. The coil configuration used will depend on application. In the installation shown, a top conical coil immersed in aluminium melt (contactless due to EM repulsion) was used. Simulations of sound, flow and EM fields are given, compared with experiments indicating strong stirring, good particle dispersion and evidence of cavitation.

Item Type:	Book Section
Uncontrolled Keywords:	Ultrasonic melt treatment - Electromagnetic vibration - Gas cavitation
Subjects:	Q Science > QA Mathematics
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > Centre for Numerical Modelling & Process Analysis (CNMPA) Faculty of Engineering & Science > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG) Faculty of Engineering & Science > School of Computing & Mathematical Sciences (CMS)
Related URLs:	Publisher
Last Modified:	22 May 2023 09:40
URI:	http://gala.gre.ac.uk/id/eprint/22364

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