Equiaxed grain structure formation during directional solidification of a refined Al-20wt.%Cu alloy: in situ analysis of temperature gradient effects

H. Soltani (1) , G. Reinhart (2) , M.C. Benoudia (3) , F. Ngomesse (2) , M. Zahzouh (1) , H. Nguyen-Thi (2)

1 UBMA - Université Badji Mokhtar Annaba
2 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
3 Ecole Nationale Supérieure des Mines et de la Métallurgie, L3M

Three series of directional solidification experiments on refined Al-20wt.%Cu alloys have been carried out with different temperature gradients, and for each of them a wide range of cooling rates were applied. The experiments were performed in horizontal configuration to minimize the impact of gravity-driven phenomena and characterized in situ and in real-time by using the X-radiography technique. The influence of the temperature gradient on the microstructure formation (impact of Temperature Gradient Zone Melting: TGZM), the nucleation distance, the

Keywords: Directional solidification; Characterization; Dendrites; Nucleation; Alloys; Metals

Domains: Chemical Sciences; Material chemistry

H. Soltani, G. Reinhart, M.C. Benoudia, F. Ngomesse, M. Zahzouh, et al.. Equiaxed grain structure formation during directional solidification of a refined Al-20wt.%Cu alloy: in situ analysis of temperature gradient effects. Journal of Crystal Growth, 2022, 587, pp.126645. ⟨10.1016/j.jcrysgro.2022.126645⟩. ⟨hal-03637536⟩