Non-steady 3D dendrite tip growth under diffusive and weakly convective conditions

Files in This Item:
Access to this item has been restricted by the copyright holder until:2021-01-16
File Description SizeFormat 
MirihanageEtAl_Revised_manuscript_submitted.pdf978.92 kBAdobe PDF    Request a copy
Title: Non-steady 3D dendrite tip growth under diffusive and weakly convective conditions
Authors: Mirihanage, Wajira U.Falch, Ken VidarCasari, DanieleMcFadden, ShaunBrowne, David al.
Permanent link:
Date: 16-Jan-2019
Online since: 2019-05-29T07:57:43Z
Abstract: Three dimensional α-Al dendrite tip growth under varying solute gradients in an Al-Cu-Si alloy melt has been studied using real time synchrotron X-ray imaging and mathematical modelling. X-radiographic image sequences with high temporal and spatial resolution were processed and analysed to retrieve three-dimensional spatial details of the evolving dendrite and the solute concentration field, providing vastly improved estimates for the latter, in particular for the melt regions adjacent to the dendrite tips. Computational results obtained from an extended Horvay-Cahn dendrite tip model, capable of taking into account the effects of sample confinement, showed good agreement with the experimental data, and can be taken to verify the robustness of the 3D data extraction protocol.
Funding Details: European Commission - Seventh Framework Programme (FP7)
Type of material: Journal Article
Publisher: Elsevier
Journal: Materialia
Volume: 5
Issue: 100215
Copyright (published version): 2019 Acta Materialia
Keywords: Dendritic solidicationIn situ X-radiographySolute diffusion4D analysis
DOI: 10.1016/j.mtla.2019.100215
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

Show full item record

Google ScholarTM



This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.