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HomeMaterials Science ForumMaterials Science Forum Vol. 941Traveling Waves Induced by Sweeping Flows on...

Traveling Waves Induced by Sweeping Flows on Solidification Interfaces

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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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THERMEC 2018

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Periodical:

Materials Science Forum (Volume 941)

Pages:

1546-1551

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.941.1546

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Online since:

December 2018

Authors:

Alain Pocheau*, Tania Jiang, Marc Georgelin

Keywords:

Directional Solidification, Flow, Interfacial Waves, Striations

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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