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 1

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Keywords

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

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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