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

Materials Engineering

Research output: Contribution to journal › Article › peer-review

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
Pages (from-to)	100215
Journal	Acta Mater.
Early online date	16 Jan 2019
DOIs	https://doi.org/10.1016/j.mtla.2019.100215
Publication status	E-pub ahead of print - 16 Jan 2019

Keywords

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

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10.1016/j.mtla.2019.100215

https://linkinghub.elsevier.com/retrieve/pii/S2589152919300109

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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 = "W.u. Mirihanage and K.v. Falch and D. Casari and S. Mcfadden and D.j. Browne and I. Snigireva and A. Snigirev and Y.j. Li and R.h. Mathiesen",

year = "2019",

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day = "16",

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

language = "English",

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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 - 2019/1/16

Y1 - 2019/1/16

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

U2 - 10.1016/j.mtla.2019.100215

DO - 10.1016/j.mtla.2019.100215

M3 - Article

SN - 2589-1529

SP - 100215

JO - Acta Mater.

JF - Acta Mater.

ER -

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

Abstract

Keywords

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