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Traveling waves induced by sweeping flows on solidification interfaces

Abstract : Solidification of alloys in a thermal gradient usually involves the generation of flows by thermal or thermosolutal convection. We experimentally study their effects on the dynamics of a solidification interface by inducing a controlled sweeping flow in a directional solidification device. Flow is induced in the sample from an external thermosiphon. Downstream inclination of microstructures and downstream sidebranch development are observed. However, the major outcome is the evidence of large scale travelling waves on the solidification interface. They are induced by the coupling between solidification and flow and yield repetitive striations of the solid phase. Two waves are observed and characterized.
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https://hal-amu.archives-ouvertes.fr/hal-03543200
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Submitted on : Tuesday, January 25, 2022 - 7:18:54 PM
Last modification on : Wednesday, January 26, 2022 - 3:40:52 AM

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  • HAL Id : hal-03543200, version 1

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Alain Pocheau, Tania Jiang, Marc Georgelin. Traveling waves induced by sweeping flows on solidification interfaces. Thermec'2018 International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS Processing, Fabrication, Properties, Applications, M. Jeandin (Mines ParisTech, France), C. Richard (Université de Tours, France), R. dshabadi (Université de Lille, France), Jul 2018, Paris, France. ⟨hal-03543200⟩

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