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Synchrotron quantification of ultrasound cavitation and bubble dynamics in Al-10Cu melts

Xu, WW; Tzanakis, I; Srirangam, P; Mirihanage, WU; Eskin, DG; Bodey, AJ; Lee, PD; (2016) Synchrotron quantification of ultrasound cavitation and bubble dynamics in Al-10Cu melts. Ultrasonics Sonochemistry , 31 pp. 355-361. 10.1016/j.ultsonch.2016.01.017. Green open access

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Abstract

Knowledge of the kinetics of gas bubble formation and evolution under cavitation conditions in molten alloys is important for the control casting defects such as porosity and dissolved hydrogen. Using in situ synchrotron X-ray radiography, we studied the dynamic behaviour of ultrasonic cavitation gas bubbles in a molten Al–10 wt% Cu alloy. The size distribution, average radius and growth rate of cavitation gas bubbles were quantified under an acoustic intensity of 800 W/cm2 and a maximum acoustic pressure of 4.5 MPa (45 atm). Bubbles exhibited a log-normal size distribution with an average radius of 15.3 ± 0.5 μm. Under applied sonication conditions the growth rate of bubble radius, R(t), followed a power law with a form of R(t) = αtβ, and α = 0.0021 & β = 0.89. The observed tendencies were discussed in relation to bubble growth mechanisms of Al alloy melts.

Type: Article
Title: Synchrotron quantification of ultrasound cavitation and bubble dynamics in Al-10Cu melts
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ultsonch.2016.01.017
Publisher version: https://doi.org/10.1016/j.ultsonch.2016.01.017
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Technology, Physical Sciences, Acoustics, Chemistry, Multidisciplinary, Chemistry, Synchrotron X-ray radiography, Ultrasound cavitation, Cavitation bubble, Degassing, Al-Cu alloy, X-RAY RADIOGRAPHY, ALUMINUM-COPPER ALLOYS, IN-SITU OBSERVATION, AL-CU ALLOY, HYDROGEN POROSITY, MOLTEN ALUMINUM, SOLIDIFICATION, GROWTH, FRAGMENTATION, DEFORMATION
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10049201
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