<i>In situ</i> experimental observation of the time evolution of a dendritic mushy zone in a fixed temperature gradient

Georges Salloum Abou Jaoudé; Guillaume Reinhart; Henri Nguyen-Thi; Hervé Combeau; Miha Založnik; Thomas Schenk; Tamzin Lafford

doi:10.1016/j.crme.2013.01.013

In situ experimental observation of the time evolution of a dendritic mushy zone in a fixed temperature gradient

Georges Salloum Abou Jaoudé ^1,² ; Guillaume Reinhart ^1,² ; Henri Nguyen-Thi ^1,² ; Hervé Combeau ³ ; Miha Založnik ³ ; Thomas Schenk ³ ; Tamzin Lafford ⁴

¹ Aix-Marseille Université, campus Saint-Jérôme case 142, 13397 Marseille cedex 20, France
² CNRS, IM2NP UMR 7334, campus Saint-Jérôme case 142, 13397 Marseille cedex 20, France
³ IJL, Départment SI2M, UMR CNRS 7198, Lorraine University, École des mines de Nancy, parc de Saurupt, CS 14234, 54042 Nancy cedex, France
⁴ European Synchrotron Radiation Facility (ESRF), 6, rue Jules-Horowitz, BP 220, 38048 Grenoble cedex 9, France

Comptes Rendus. Mécanique, Volume 341 (2013) no. 4-5, pp. 421-428.

Résumé

This paper describes a series of experiments performed on BM05 at the European Synchrotron Radiation Facility (ESRF), dedicated to the analysis of a mushy zone evolution in a fixed temperature gradient. A mushy zone is the partially solid/partially liquid zone that is formed when solidification proceeds with the development of dendrites, and it has been recently shown that synchrotron X-ray radiography is a powerful technique, perfectly adapted for such a study. In situ and real-time characterisation clearly evidences the microstructural changes of the mushy zone during the holding stage, and measurements of the mushy zone boundary positions using image processing enable us to analyse the successive regimes. Each regime is directly related to solute diffusion mechanisms, namely temperature gradient zone melting, solute diffusion in the inter-dendritic liquid channels due to the solid-fraction gradient and solute diffusion in the melt.

Publié le : 2013-02-26

DOI : 10.1016/j.crme.2013.01.013

Mots clés : Mushy zone, Solidification, Solid crust, Solute diffusion, Synchrotron, TGZM, X-ray radiography

Affiliations des auteurs :

Georges Salloum Abou Jaoudé ^{1, 2} ; Guillaume Reinhart ^{1, 2} ; Henri Nguyen-Thi ^{1, 2} ; Hervé Combeau ³ ; Miha Založnik ³ ; Thomas Schenk ³ ; Tamzin Lafford ⁴

¹ Aix-Marseille Université, campus Saint-Jérôme case 142, 13397 Marseille cedex 20, France
² CNRS, IM2NP UMR 7334, campus Saint-Jérôme case 142, 13397 Marseille cedex 20, France
³ IJL, Départment SI2M, UMR CNRS 7198, Lorraine University, École des mines de Nancy, parc de Saurupt, CS 14234, 54042 Nancy cedex, France
⁴ European Synchrotron Radiation Facility (ESRF), 6, rue Jules-Horowitz, BP 220, 38048 Grenoble cedex 9, France

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     author = {Georges Salloum Abou Jaoud\'e and Guillaume Reinhart and Henri Nguyen-Thi and Herv\'e Combeau and Miha Zalo\v{z}nik and Thomas Schenk and Tamzin Lafford},
     title = {\protect\emph{In situ} experimental observation of the time evolution of a dendritic mushy zone in a fixed temperature gradient},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {421--428},
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     volume = {341},
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     year = {2013},
     doi = {10.1016/j.crme.2013.01.013},
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Georges Salloum Abou Jaoudé; Guillaume Reinhart; Henri Nguyen-Thi; Hervé Combeau; Miha Založnik; Thomas Schenk; Tamzin Lafford. In situ experimental observation of the time evolution of a dendritic mushy zone in a fixed temperature gradient. Comptes Rendus. Mécanique, Volume 341 (2013) no. 4-5, pp. 421-428. doi : 10.1016/j.crme.2013.01.013. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2013.01.013/

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