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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Materials Processing Fundamentals
Presentation Title Scaling Up of Contactless Ultrasonic Cavitation
Author(s) Catherine E H Tonry, Christopher Beckwith, Valdis Bojarevics, Georgi Djambazov, Koulis Pericleous
On-Site Speaker (Planned) Catherine E H Tonry
Abstract Scope Ultrasonic Treatment (UST) of liquid metals has shown great potential for both grain refinement and degassing. Current UST methods use an immersed sonotrode to treat the melt. This approach has limitations due to impurities being introduced. A high frequency electromagnetic coil placed in proximity to the melt surface, induces ultrasound, avoiding contact, while adding heat and vigorous mixing. To ensure the resulting pressure waves reach the level required for cavitation it is necessary to tune the system for acoustic resonance. The cavitation zone then resides deep in the melt, avoiding the gas shielding problem of immersed probes and allowing the treatment of larger volumes. Extensive studies in aluminium, have shown that this technique can produce grain refinement and enhance degassing. Recent modelling work has suggested that by using higher resonant modes of the system, a larger crucible can be resonated leading to the possibility of treating much larger volumes.
Proceedings Inclusion? Planned:
Keywords Aluminum, Modeling and Simulation, Process Technology


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