Formation behavior of acoustic cavitation in molten aluminum alloys under ultrasonic vibration

Tadashi Matsunaga, Kenji Ogata, Tomei Hatayama, Kenji Shinozaki, Makoto Yoshida

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    In order to investigate behavior of acoustic cavitation in molten aluminum alloys when ultrasonic vibration was applied, we measured sound pressure in molten aluminum alloys by means of acoustic emission (AE). The frequency analysis was performed to the obtained sound pressure. As a result, the characteristic frequency of acoustic cavitation would be 5, 10 and 260 kHz. The maximum intensity at 260 kHz was increased by addition of magnesium in molten aluminum at the ultrasonic power of more than 200 W drastically. The reason why the addition of magnesium led to promote the generation of the cavitation would be caused by its relatively low surface tension and high vapor pressure. From the viewpoint of the cavitation threshold, both the decrease in the surface tension of the molten aluminum alloy and the increase in the vapor pressure will lead to generate the acoustic cavitation. Therefore, addition of zinc of 8.7 mass% and bismuth of 0.5 mass % also caused to generate acoustic cavitation.

    Original languageEnglish
    Pages (from-to)214-220
    Number of pages7
    JournalKeikinzoku/Journal of Japan Institute of Light Metals
    Volume56
    Issue number4
    DOIs
    Publication statusPublished - 2006 Apr

    Fingerprint

    Cavitation
    Vibrations (mechanical)
    Molten materials
    Aluminum alloys
    Ultrasonics
    Acoustics
    Vapor pressure
    Magnesium
    Surface tension
    Acoustic waves
    Bismuth
    Acoustic emissions
    Aluminum
    Zinc

    Keywords

    • Acoustic cavitation
    • Acoustic emission
    • Aluminum alloy
    • Cavitation threshold
    • Ultrasonic vibration

    ASJC Scopus subject areas

    • Metals and Alloys

    Cite this

    Formation behavior of acoustic cavitation in molten aluminum alloys under ultrasonic vibration. / Matsunaga, Tadashi; Ogata, Kenji; Hatayama, Tomei; Shinozaki, Kenji; Yoshida, Makoto.

    In: Keikinzoku/Journal of Japan Institute of Light Metals, Vol. 56, No. 4, 04.2006, p. 214-220.

    Research output: Contribution to journalArticle

    Matsunaga, Tadashi ; Ogata, Kenji ; Hatayama, Tomei ; Shinozaki, Kenji ; Yoshida, Makoto. / Formation behavior of acoustic cavitation in molten aluminum alloys under ultrasonic vibration. In: Keikinzoku/Journal of Japan Institute of Light Metals. 2006 ; Vol. 56, No. 4. pp. 214-220.
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