Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 30, Issue 10, Pages 7716-7720Publisher
SPRINGER
DOI: 10.1007/s11665-021-05946-3
Keywords
cavitation; metallic melt; synchrotron x-ray photography; ultrasound
Categories
Funding
- National Science Foundation of China [51704196, 61804135]
- Zhejiang Provincial Natural Science Foundation [Y201738262]
- State Key Lab of Advanced Metals and Materials [2020-Z07]
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The distribution of cavitation bubbles in Al-18wt.%Cu during ultrasonic melt processing is influenced by acoustic intensity and distance from the radiation face. The bubbles show a clear difference in distribution, which significantly impacts the solidification structure.
The spatial and size distribution of cavitation bubbles in Al-18wt.%Cu during ultrasonic melt processing at a fixed acoustic intensity input was exhaustively studied by utilizing synchrotron x-ray photography. The result reveals that the larger bubbles concentrate within an intense cavitation zone close to the radiation face of sonotrode, which is out-surrounded by a weak cavitation zone with bubbles sparse-inhabitation. Most cavitation bubbles obey a truncated size-Gaussian distribution, and the average size decreases as distanced away from the radiation face. The intensive cavitation zone contributes to an effectively refined solidification structure.
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