Machining of Aluminium with MHz High-Intensity Focused Ultrasound

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Cavitation-induced surface erosion has been studied for decades. High-intensity focused ultrasound (HIFU) enables localized erosion, with applications in many fields. However, no research has been published on machining solely with HIFU. Compared to existing micro-machining technologies, HIFU exhibits a unique set of benefits: inexpensive, minimal maintenance due to non-contact machining without slurry, mitigated chemical load, and monitoring capability. We demonstrate controlled surface machining of mirror-polished aluminium (AW-5754) using high-frequency (12 MHz) HIFU-induced cavitation erosion. Optimal sonication parameters (transducer-sample distance, amplitude, cycles per burst, number of bursts, and pulse repetition frequency) for stationary surface erosion were first identified experimentally. These parameters served as a basis for studying the effect of sonication parameters during on-the-fly erosion, i.e., engraving lines. The effect of stage translation velocity and the number of repeated passes across the engraved line were also studied. Subsequently, the acronym of our laboratory, “ETLA”, was engraved, with a 500 µm letter height and an average line width of 53 µm.
Original languageEnglish
Title of host publication2022 IEEE International Ultrasonics Symposium (IUS)
Number of pages4
Publication date1 Dec 2022
ISBN (Print)978-1-6654-7813-7
ISBN (Electronic)978-1-6654-6657-8
Publication statusPublished - 1 Dec 2022
MoE publication typeA4 Article in conference proceedings
Event2022 IEEE International Ultrasonics Symposium (IUS) - Venice, Italy
Duration: 10 Oct 202213 Oct 2022

Publication series

ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Fields of Science

  • 114 Physical sciences
  • Ultrasonics
  • Micromachining
  • Cavitation erosion
  • MHz high-intensity focused ultrasound

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