Journal
SCRIPTA MATERIALIA
Volume 180, Issue -, Pages 29-33Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.12.026
Keywords
Solidification; Gravity; 4D; Synchrotron tomography
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Funding
- UK-EPSRC [EP/K007734/1]
- NERC [NE/M013561/1]
- Diamond Birmingham Collaboration
- Alan Turing Fellowship
- Royal Academy of Engineering Chair In Emerging Technology
- EPSRC [EP/K007734/1, EP/K006649/1] Funding Source: UKRI
- NERC [NE/M013561/1, NE/M013561/2, NE/N018575/1] Funding Source: UKRI
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The effect of gravity on thermo-solutal convection and its impact on solidification dynamics of an Al-15 wt%Cu alloy were studied using high speed synchrotron tomography. A method for mapping the composition of the solidifying samples was developed, enabling three-dimensional quantification of the time evolved solute concentration and dendrite morphology. Differences in solute segregation, dendrite morphology and fragmentation between upwards and downwards solidification were identified, which were attributed to buoyancy-modulated thermal-solutal convection. Crown Copyright (C) 2020 Published by Elsevier Ltd on behalf of Acta Materialia Inc. All rights reserved.
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