Comparative study of the Columnar-Equiaxed Transition in microgravity and on ground during directional solidification of a refined Al - 3.5 wt% Ni alloy D. Camel et M. D. DupouyJ. Phys. IV France, 11 PR6 (2001) Pr6-119-Pr6-126DOI: https://doi.org/10.1051/jp4:2001614