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Ultrasonic Vibration as a Primary Mixing Tool in Accelerating Aluminum–Copper Alloys Preparation from Their Pure Elements

CMEMS-UMinho, Mechanical Engineering Department, University of Minho, 4800-058 Guimarães, Portugal
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Metals 2019, 9(7), 781; https://doi.org/10.3390/met9070781
Received: 12 June 2019 / Revised: 4 July 2019 / Accepted: 4 July 2019 / Published: 12 July 2019
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Abstract

In this study, ultrasonic vibration (USV) was evaluated in preparation of Al–8wt.%Cu alloys at a lab-scale. Moreover, the role of Ti–6Al–4V sonotrode erosion and its contribution in grain refining were analyzed. Based on the experimental conditions/parameters, it was found that the amount of impurities and the associated porosity were significantly reduced in USV treated alloys. Furthermore, USV reduced the time needed for dissolving the alloying element Cu, nevertheless, the best dissolving of Cu in this study was not possible without introducing further holding time. As a result of using a titanium-based sonotrode, a noticeable content of Ti was found in the ultrasonically treated alloys due to sonotrode erosion under USV. The dispersion of TiAl3 promoted, as a main factor, a grain refining effect at relatively constant and high melt temperature, other possible mechanisms of grain refining have been discussed. View Full-Text
Keywords: ultrasonic vibration; aluminum alloy; impurities; porosity; grain refining; sonotrode erosion; stirring ultrasonic vibration; aluminum alloy; impurities; porosity; grain refining; sonotrode erosion; stirring
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Muhrat, A.; Puga, H.; Barbosa, J. Ultrasonic Vibration as a Primary Mixing Tool in Accelerating Aluminum–Copper Alloys Preparation from Their Pure Elements. Metals 2019, 9, 781.

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