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Effect of ultrasonic melt treatment on the refinement of primary Al3Ti intermetallic in an Al–0.4Ti alloy

Mi, Jiawei; Connolley, Thomas; Eskin, Dmitry; Wang, Feng

Authors

Thomas Connolley

Dmitry Eskin

Feng Wang



Abstract

High intensity ultrasonic melt treatment was applied to an Al–0.4 wt% Ti alloy over three selected temperature ranges: 810 to 770 °C (above liquidus), 770 to 730 °C (across liquidus), and 730 to 690 °C (below liquidus). The size and morphology of the primary Al3Ti intermetallic particles were studied by scanning electron microscopy. It was found that the primary Al3Ti intermetallics were refined as a result of ultrasonication over all three temperature ranges and their morphology changed from typical large dendritic plates to small compact tablets. Quenching experiments before and after the ultrasonication were also carried out to capture the high-temperature stage of intermetallic formation. Based on the size and morphology observations, the mechanisms for the refinement of primary Al3Ti intermetallics at different solidification stages are discussed.

Citation

Mi, J., Connolley, T., Eskin, D., & Wang, F. (2016). Effect of ultrasonic melt treatment on the refinement of primary Al3Ti intermetallic in an Al–0.4Ti alloy. Journal of Crystal Growth, 435, 24-30. https://doi.org/10.1016/j.jcrysgro.2015.11.034

Journal Article Type Article
Acceptance Date Nov 7, 2015
Online Publication Date Dec 4, 2015
Publication Date Feb 1, 2016
Deposit Date Apr 8, 2016
Publicly Available Date Apr 8, 2016
Journal Journal of crystal growth
Print ISSN 0022-0248
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 435
Pages 24-30
DOI https://doi.org/10.1016/j.jcrysgro.2015.11.034
Keywords Crystal morphology, Solidification, Ultrasonic treatment, Growth from melt, Alloys, Intermetallics
Public URL https://hull-repository.worktribe.com/output/435523
Publisher URL http://www.sciencedirect.com/science/article/pii/S0022024815007022
Additional Information This is a copy of an open access article published in Journal of crystal growth, 2016, v.435.

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Copyright Statement
This article is made available under a CC-BY licence.





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