Xu, W. W., Tzanakis, I., Srirangam, Prakash, Mirihanage, W. U., Eskin, D. G., Bodey, A. J. and Lee, P. D. (2016) Synchrotron quantification of ultrasound cavitation and bubble dynamics in Al–10Cu melts. Ultrasonics Sonochemistry, 31 . pp. 355-361. doi:10.1016/j.ultsonch.2016.01.017 ISSN 1350-4177.

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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.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH):	Fluid dynamics, Ultrasonics, Bubbles, Cavitation, Synchrotron radiation
Journal or Publication Title:	Ultrasonics Sonochemistry
ISSN:	1350-4177
Official Date:	July 2016
Dates:	Date Event July 2016 Published 18 January 2016 Available 15 January 2016 Accepted 15 October 2015 Submitted
Volume:	31
Page Range:	pp. 355-361
DOI:	10.1016/j.ultsonch.2016.01.017
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	15 February 2016
Date of first compliant Open Access:	18 January 2017
Funder:	Seventh Framework Programme (European Commission) (FP7), European Space Agency (ESA), Engineering and Physical Sciences Research Council (EPSRC)
Grant number:	FP7-NMP3-LA-2012-280421, EP/I02249X/1, EP/K00588X/1, EP/K005804/1

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