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Synchrotron radiographic studies of ultrasonic melt processing of metal matrix nano composites

Mirihanage, W; Xu, W; Tamayo-Ariztondo, J; Eskin, D; Garcia-Fernandez, M; Srirangam, P; Lee, P; (2016) Synchrotron radiographic studies of ultrasonic melt processing of metal matrix nano composites. Materials Letters , 164 pp. 484-487. 10.1016/j.matlet.2015.11.022. Green open access

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Abstract

Fast synchrotron radiography was used to investigate ultrasonic cavitation bubble formation and their dynamics during liquid metal processing of Al-Cu metal matrix nano composites (MMNC) in comparison with conventional alloys. The experimental observations showed enhanced cavitation potential in MMNC melts, due to the presence of Al2O3nano particles which were believed to be acting as heterogeneous nuclei for bubble formation. Quantitative image analysis demonstrates that the addition of nano particles increases melt agitation partially, while introducing higher flow velocity variations across the melt. This suggests that the presence of nano particles may substantially alter propensity for ultrasonic treatment effects during solidification processing of MMNCs.

Type: Article
Title: Synchrotron radiographic studies of ultrasonic melt processing of metal matrix nano composites
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.matlet.2015.11.022
Publisher version: https://doi.org/10.1016/j.matlet.2015.11.022
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: Metal matrix nano composites, Synchrotron radiography, Ultrasonic cavitation, Aluminium
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/10062984
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