Gravity effect on thermal-solutal convection during solidification revealed by four-dimensional synchrotron imaging with compositional mapping

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Title:	Gravity effect on thermal-solutal convection during solidification revealed by four-dimensional synchrotron imaging with compositional mapping
Authors:	Nelson, T Cai, B Warnken, N Lee, PD Boller, E Magdysyuk, OV Green, NR
Item 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.
Issue Date:	15-Apr-2020
Date of Acceptance:	19-Dec-2019
URI:	http://hdl.handle.net/10044/1/76942
DOI:	10.1016/j.scriptamat.2019.12.026
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/
Keywords:	0204 Condensed Matter Physics 0912 Materials Engineering 0913 Mechanical Engineering Materials
Publication Status:	Published online
Online Publication Date:	2020-01-28
Appears in Collections:	Materials