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In situ synchrotron x-ray study of ultrasound cavitation and its effect on solidification microstructures

Mi, Jiawei; Tan, Dongyue; Lee, Tung Lik

Authors

Dongyue Tan

Tung Lik Lee



Abstract

Considerable progress has been made in studying the mechanism and effectiveness of using ultrasound waves to manipulate the solidification microstructures of metallic alloys. However, uncertainties remain in both the underlying physics of how microstructures evolve under ultrasonic waves, and the best technological approach to control the final microstructures and properties. We used the ultrafast synchrotron X-ray phase contrast imaging facility housed at the Advanced Photon Source, Argonne National Laboratory, US to study in situ the highly transient and dynamic interactions between the liquid metal and ultrasonic waves/bubbles. The dynamics of ultrasonic bubbles in liquid metal and their interactions with the solidifying phases in a transparent alloy were captured in situ. The experiments were complemented by the simulations of the acoustic pressure field, the pulsing of the bubbles, and the associated forces acting onto the solidifying dendrites. The study provides more quantitative understanding on how ultrasonic waves/bubbles influence the growth of dendritic grains and promote the grain multiplication effect for grain refinement.

Journal Article Type Article
Publication Date Aug 7, 2015
Journal Metallurgical and materials transactions b
Print ISSN 1073-5615
Electronic ISSN 1543-1916
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 46
Issue 4
Pages 1615-1619
APA6 Citation Mi, J., Tan, D., & Lee, T. L. (2015). In situ synchrotron x-ray study of ultrasound cavitation and its effect on solidification microstructures. Metallurgical and Materials Transactions B, 46(4), 1615-1619. https://doi.org/10.1007/s11663-014-0256-z
DOI https://doi.org/10.1007/s11663-014-0256-z
Keywords Ultrasound cavitation
Publisher URL http://link.springer.com/article/10.1007%2Fs11663-014-0256-z
Copyright Statement © The Author(s) 2014
Open Access
This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
Additional Information This is a copy of an open access article published in Metallurgical and materials transactions b, 2014, v.46B issue 4. e final publication is available at Springer via http://dx.doi.org/10.1007/s11663-014-0256-z.

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Copyright Statement
© The Author(s) 2014
Open Access
This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.





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