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Structure refinement upon ultrasonic melt treatment in a DC casting launder

Structure refinement upon ultrasonic melt treatment in a DC casting launder

Subroto, Tungky, Eskin, Dmitry G., Beckwith, Christopher, Skalicky, Ivan, Roberts, Dan, Tzanakis, Iakovos and Pericleous, Koulis ORCID: 0000-0002-7426-9999 (2020) Structure refinement upon ultrasonic melt treatment in a DC casting launder. JOM Journal of the Minerals, Metals and Materials Society, 72 (11). pp. 4071-4081. ISSN 1047-4838 (Print), 1543-1851 (Online) (doi:https://doi.org/10.1007/s11837-020-04269-3)

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Abstract

This work focuses on ultrasonic melt treatment (UST) in a launder upon pilot scale direct chill (DC) casting of 152-mm-diameter billets from an AA6XXX alloy with Zr addition. Two casting temperatures (650C and 665C) were used to assess their effect on the resulting microstructure (grain size, particle size, and number density). Structure refinement results show the feasibility of UST in the DC casting launder. This is quantified through the corresponding reduction of grain size by around 50% in the billet center, or more towards the billet surface, reduction of the average Al3Zr particle size, and increase in the particle number density. A higher Al3Zr particle density was obtained when the alloy was cast at 665C. Numerical simulation results and suggestions on how to improve the treatment quality of UST in DC casting launder are also provided.

Item Type: Article
Additional Information: © 2020 The Author(s). Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Uncontrolled Keywords: Ultrasonic melt treatment, DC casting, grain refinement
Subjects: Q Science > QA Mathematics
Faculty / Department / Research Group: Faculty of Liberal Arts & Sciences
Faculty of Liberal Arts & Sciences > Centre for Numerical Modelling & Process Analysis (CNMPA)
Faculty of Liberal Arts & Sciences > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG)
Faculty of Liberal Arts & Sciences > School of Computing & Mathematical Sciences (CAM)
Last Modified: 02 Dec 2020 16:41
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: REF 6
URI: http://gala.gre.ac.uk/id/eprint/29001

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