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

W. U. Mirihanage; K.V.  Falch; D. Casari; S McFadden; D. J. Browne; I. Snigireva; A. Snigirev; Y. J. Li; R.H. Mathiesen

doi:10.1016/j.mtla.2019.100215

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

W. U. Mirihanage, K.V. Falch, D. Casari, S McFadden, D. J. Browne, I. Snigireva, A. Snigirev, Y. J. Li, R.H. Mathiesen

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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.

Original language	English
Article number	100215
Pages (from-to)	1-8
Number of pages	8
Journal	Materialia
Volume	5
Early online date	16 Jan 2019
DOIs	https://doi.org/10.1016/j.mtla.2019.100215
Publication status	Published (in print/issue) - 31 Mar 2019

Keywords

Dendritic solidification
In situ X-radiography
Solute diffusion
4D analysis

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10.1016/j.mtla.2019.100215

Accepted author manuscriptAuthor Accepted Manuscript, 1.13 MB

Cite this

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title = "Non-steady 3D dendrite tip growth under diffusive and weakly convective conditions",

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.",

keywords = "Dendritic solidification, In situ X-radiography, Solute diffusion, 4D analysis",

author = "Mirihanage, {W. U.} and K.V. Falch and D. Casari and S McFadden and Browne, {D. J.} and I. Snigireva and A. Snigirev and Li, {Y. J.} and R.H. Mathiesen",

year = "2019",

month = mar,

day = "31",

doi = "10.1016/j.mtla.2019.100215",

language = "English",

volume = "5",

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journal = "Materialia",

issn = "2589-1529",

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TY - JOUR

T1 - Non-steady 3D dendrite tip growth under diffusive and weakly convective conditions

AU - Mirihanage, W. U.

AU - Falch, K.V.

AU - Casari, D.

AU - McFadden, S

AU - Browne, D. J.

AU - Snigireva, I.

AU - Snigirev, A.

AU - Li, Y. J.

AU - Mathiesen, R.H.

PY - 2019/3/31

Y1 - 2019/3/31

N2 - 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.

AB - 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.

KW - Dendritic solidification

KW - In situ X-radiography

KW - Solute diffusion

KW - 4D analysis

UR - http://www.scopus.com/inward/record.url?scp=85061036858&partnerID=8YFLogxK

UR - https://pure.ulster.ac.uk/en/publications/non-steady-3d-dendrite-tip-growth-under-diffusive-and-weakly-conv

U2 - 10.1016/j.mtla.2019.100215

DO - 10.1016/j.mtla.2019.100215

M3 - Article

SN - 2589-1529

VL - 5

SP - 1

EP - 8

JO - Materialia

JF - Materialia

M1 - 100215

ER -

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

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Shaun McFadden

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

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Shaun McFadden

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