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Title: Synchrotron radiographic studies of ultrasonic melt processing of metal matrix nano composites
Authors: Mirihanage, W
Xu, W
Tamayo-Ariztondo, J
Eskin, D
Garcia-Fernandez, M
Srirangam, P
Lee, P
Keywords: Metal matrix nano composites;Synchrotron radiography;Ultrasonic cavitation;Aluminium
Issue Date: 2016
Publisher: Elsevier
Citation: Materials Letters, 164: pp. 484–487, (2016)
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 Al2O3 nano particles which 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.
ISSN: 0167-577X
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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