Gravity effect on thermal-solutal convection during solidification revealed by four-dimensional synchrotron imaging with compositional mapping
File(s)J310_Nelson_Cai_Scripta_as_accepted_191219.pdf (1.28 MB)
Accepted version
Author(s)
Type
Journal Article
Abstract
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.
Date Issued
2020-04-15
Date Acceptance
2019-12-19
Citation
Scripta Materialia, 2020, 180, pp.29-33
ISSN
1359-6462
Publisher
Elsevier BV
Start Page
29
End Page
33
Journal / Book Title
Scripta Materialia
Volume
180
Copyright Statement
© 2020 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
https://www.sciencedirect.com/science/article/pii/S1359646219307456?via%3Dihub
Subjects
0204 Condensed Matter Physics
0912 Materials Engineering
0913 Mechanical Engineering
Materials
Publication Status
Published online
Date Publish Online
2020-01-28