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Article Dans Une Revue Materials Science Forum Année : 2018

Traveling Waves Induced by Sweeping Flows on Solidification Interfaces

Résumé

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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Dates et versions

hal-02079391 , version 1 (26-03-2019)

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Alain Pocheau, Tania Jiang, Marc Georgelin. Traveling Waves Induced by Sweeping Flows on Solidification Interfaces. Materials Science Forum, 2018, 941, pp.1546-1551. ⟨10.4028/www.scientific.net/MSF.941.1546⟩. ⟨hal-02079391⟩
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