| Equipe Microstructures de Croissance Auto-organisées Self-organized Growth Microstructures Team | ||
| Adresse : IM2NP Faculté des Sciences et Techniques Aile 1 - niveau 4, service 141 Avenue Escadrille Normandie Niemen 13397 Marseille Cedex 20 France |
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Radiographie enregistrée lors de la croissance de dendrites colonnaires.(alliage : Al – 3,5 % pds Ni ; G = 7 K/cm ; V = 40 µm/s) Expérience réalisée à l’ESRF (European Synchrotron Radiation Facility) Grenoble. |
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Films : microstructures de solidification
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In situ and real-time observation by X-ray radiography of the initial transient during non refined Al-3.5wt% Ni solidification, G = 20 K/cm. Solidification was induced by pulling the sample toward the cold zone of the furnace at V = 1 mm/s. The aluminium rich solidified part appears in grey while the Ni enriched liquid is dark. |
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In situ and real-time observation of columnar dendritic solidification in a SCN-0.1wt%Camphor alloy (G = 17 K/cm ; V = 20 µm/s). Multiple and continuous tip-splittings of dendrites |
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 CET AlNi |
In situ and real-time observation by X-ray radiography of the columnar to Equiaxed Transition (CET) during refined Al-3.5wt% Ni solidification, G = 30 K/cm. CET was induced by increasing the pulling rate from V = 2 to 15 mm/s. The aluminium rich solidified parts appear in grey while the Ni enriched liquid is dark. |
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 CET_SCN-H2O_1 |
CET_SCN-H2O_1
In situ and real-time observation by the Columnar to Equiaxed Transition (CET) during downward solidification of a Succinonitrile-29wt%H2O alloy. CET was induced by the gradual increase of the pulling rate, due to the imposed decrease of the temperature of furnace hot zone. In "CET_SCN-H2O_1", fragmentations of the dendritic branches occur in the columnar area (top zone) and the fragments are driven away by convection and are used to nucleate the equiaxed grains. |
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 Equiaxed_AlCu10_iso1 |
In situ and real-time observation by X-ray radiography of the equiaxed growth in nearly isothermal conditions of non-refined Al-10wt% Cu alloy. Solidification was induced by decreasing the temperatures of hot and cold zones of the furnace at R = 0.5 K/min. The solid parts mainly constituted of aluminium appear in white while the Cu enriched liquid is dark. |
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