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Characterization of ultrasonic bubble clouds in a liquid metal by synchrotron X-ray high speed imaging and statistical analysis

DOI: 10.3390/ma13010044 DOI Help

Authors: Chuangnan Wang (University of Hull) , Thomas Connolley (Diamond Light Source) , Iakovos Tzanakis (Oxford Brooks University) , Dmitry Eskin (Brunel University London) , Jiawei Mi (University of Hull)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Materials , VOL 13 , PAGES 44

State: Published (Approved)
Published: December 2019
Diamond Proposal Number(s): 12131

Open Access Open Access

Abstract: Quantitative understanding of the interactions of ultrasonic waves with liquid and solidifying metals is essential for developing optimal processing strategies for ultrasound processing of metal alloys in the solidification processes. In this research, we used the synchrotron X-ray high-speed imaging facility at Beamline I12 of the Diamond Light Source, UK to study the dynamics of ultrasonic bubbles in a liquid Sn-30wt%Cu alloy. A new method based on the X-ray attenuation for a white X-ray beam was developed to extract quantitative information about the bubble clouds in the chaotic and quasi-static cavitation regions. Statistical analyses were made on the bubble size distribution, and velocity distribution. Such rich statistical data provide more quantitative information about the characteristics of ultrasonic bubble clouds and cavitation in opaque, high-temperature liquid metals.

Journal Keywords: ultrasonic bubble clouds; synchrotron X-ray imaging; metal solidification; ultrasound melt processing

Subject Areas: Materials, Engineering

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing