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8th International Symposium on High-Temperature Metallurgical Processing pp 289–298Cite as

Sensitivity of Contactless Ultrasound Processing to Variations of the Free Surface of the Melt with Induction Heating

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Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

Contactless ultrasound treatment can be useful for high-temperature or reactive alloys in the liquid state, where contact with an immersed vibrating probe is undesirable. The alternating component of the Lorentz force can generate sound pressure levels leading to cavitation of gas bubbles in the melt, through acoustic resonance . Resonance is a function of the speed of sound in the liquid, the shape of the volume containing it and surrounding boundary conditions. Induction forces applied to a crucible lead to bulk stirring and in general deform the free surface, whose precise shape may influence the resonance conditions. This effect is investigated here by multi-physics computer modelling. Calculated results for aluminium melts are compared with experimental data and conclusions are drawn as to the sensitivity to process parameters and the reliability of this type of ultrasound metal processing.

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Acknowledgements

The authors acknowledge financial support from the ExoMet Project (co-funded by the European Commission, contract FP7-NMP3-LA-2012-280421, by the European Space Agency and by the individual partner organizations).

Author information

Authors and Affiliations

  1. University of Greenwich, London, UK

    G. Djambazov, V. Bojarevics & K. A. Pericleous

  2. University of Birmingham, Birmingham, UK

    D. Shevchenko, D. Burnard & W. Griffiths

Authors
  1. G. Djambazov
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  2. V. Bojarevics
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  3. D. Shevchenko
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  4. D. Burnard
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  5. W. Griffiths
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  6. K. A. Pericleous
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Corresponding author

Correspondence to K. A. Pericleous .

Editor information

Editors and Affiliations

  1. Michigan Technological University , Houghton, Michigan, USA

    Jiann-Yang Hwang

  2. Central South University , Changsha, Hunan, China

    Tao Jiang

  3. Proval Partners SA , Lausanne, Switzerland

    Mark William Kennedy

  4. Istanbul Technical University , Istanbul, Turkey

    Onuralp Yücel

  5. Dept of Materials Science and Eng, Carnegie Mellon Univ Dept of Materials Science and Eng, Pittsburgh, Pennsylvania, USA

    P. Chris Pistorius

  6. Universidade Federal de Minas Gerais , Belo Horizonte, Brazil

    Varadarajan Seshadri

  7. The University of Queensland , Brisbane, Australia

    Baojun Zhao

  8. RHI AG , Leoben, Austria

    Dean Gregurek

  9. Atilim University , Ankara, Turkey

    Ender Keskinkilic

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© 2017 The Minerals, Metals & Materials Society

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Djambazov, G., Bojarevics, V., Shevchenko, D., Burnard, D., Griffiths, W., Pericleous, K.A. (2017). Sensitivity of Contactless Ultrasound Processing to Variations of the Free Surface of the Melt with Induction Heating. In: Hwang, JY., et al. 8th International Symposium on High-Temperature Metallurgical Processing. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51340-9_29

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