Solidification of Undercooled Melts of Al-Based Alloys on Earth and in Space

Abstract : Containerless processing of droplets and drops by atomization and electromagnetic levitation are applied to undercool metallic melts and alloys prior to solidification. Heterogeneous nucleation on crucible walls is completely avoided giving access to large undercoolings. Experiments are performed both under terrestrial (1 g) conditions and in reduced gravity (µg) as well. Microgravity conditions are realized by the free fall of small droplets during atomization of a spray of droplets, individual drops in a drop tube and by electromagnetic levitation of drops during parabolic flights, sounding rocket missions, and using the electro-magnetic levitator multi-user facility on board the International Space Station. The comparison of both sets of experiments in 1 g and µg leads to an estimation of the influence of forced convection on dendrite growth kinetics and microstructure evolution.
Keywords : Solidification Metals
Type de document :
Article dans une revue
JOM Journal of the Minerals, Metals and Materials Society, Springer Verlag (Germany), 2017, 69 (8), pp.1303-1310. 〈10.1007/s11837-017-2402-y〉
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01555700
Contributeur : Brigitte Hanot <>
Soumis le : mardi 4 juillet 2017 - 12:26:10
Dernière modification le : mardi 27 mars 2018 - 16:06:17

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Dieter M. Herlach, Stefan Burggraf, Peter Galenko, Charles-André Gandin, Asuncion Garcia-Escorial, et al.. Solidification of Undercooled Melts of Al-Based Alloys on Earth and in Space. JOM Journal of the Minerals, Metals and Materials Society, Springer Verlag (Germany), 2017, 69 (8), pp.1303-1310. 〈10.1007/s11837-017-2402-y〉. 〈hal-01555700〉

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