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Ultrasonic Melt Treatment of Light Alloys

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Abstract

The application of ultrasonic vibrations when casting aluminium alloys can improve the final quality of castings. Moreover, ultrasound has no direct environmental impact as compared to traditional melt treatment routes. Ultrasound has been used with different purposes in aluminium casting: (1) degassing of aluminium alloys leading to high density and virtually gas porosity free castings; (2) promoting nucleation, thus leading to highly refined microstructures, including refinement and dispersion of intermetallic compounds; (3) improving castings mechanical properties either by promoting heterogeneous nucleation and development of equiaxed globular structures or dendrite fragmentation. This article presents the experimental work carried out so far at the University of Minho, Portugal, in this field and focuses on the results and benefits of ultrasonic melt processing when compared with traditional alternatives like the chemical routes.

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Acknowledgements

This study was supported by FEDER/COMPETE funds and by national funds through FCT and was developed on the aim of the research Postdoctoral grant SFRH/BPD/76680/2011. Also, this work has been supported by FCT with the reference project UID/EEA/04436/2013, by FEDER funds through the COMPETE 2020—Programa Operacional Competitividade e Internacionalização (POCI) with the reference project POCI-01-0145-FEDER-006941.

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Authors and Affiliations

  1. CMEMS – Center for Microelectromechanical Systems, Universidade do Minho, Azurém, Guimarães, Portugal

    Joaquim Barbosa & Hélder Puga

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  1. Joaquim Barbosa
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  2. Hélder Puga
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Correspondence to Joaquim Barbosa.

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Barbosa, J., Puga, H. Ultrasonic Melt Treatment of Light Alloys. Inter Metalcast 13, 180–189 (2019). https://doi.org/10.1007/s40962-018-0248-x

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