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Growth of β intermetallic in an Al-Cu-Si alloy during directional solidification via machine learned 4D quantification

Cai, B; Kao, A; Lee, PD; Boller, E; Basevi, H; Phillion, AB; Leonardis, A; (2019) Growth of β intermetallic in an Al-Cu-Si alloy during directional solidification via machine learned 4D quantification. Scripta Materialia , 165 pp. 29-33. 10.1016/j.scriptamat.2019.02.007. Green open access

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Abstract

Fe contamination is a serious composition barrier for Al recycling. In Fe-containing Al-Si-Cu alloy, a brittle and plate-shaped β phase forms, degrading the mechanical properties. Here, 4D (3D plus time) synchrotron X-ray tomography was used to observe the directional solidification of Fe-containing Al-Si-Cu alloy. The quantification of the coupled growth of the primary and β phase via machine learning and particle tracking, demonstrates that the final size of the β intermetallics were strongly influenced by the solute segregation and space available for growth whereas the β orientation was controlled by the temperature gradient direction. The work can be used to validate predictive models.

Type: Article
Title: Growth of β intermetallic in an Al-Cu-Si alloy during directional solidification via machine learned 4D quantification
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.scriptamat.2019.02.007
Publisher version: http://doi.org/10.1016/j.scriptamat.2019.02.007
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: Al alloys, Intermetallics, Synchrotron X-ray tomography,4D imaging
UCL classification: UCL
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/10070392
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