Comparative study of the influence of natural convection on directional solidification of Al–3.5wt% Ni and Al–7wt% Si alloys - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Advances in Space Research Année : 2008

Comparative study of the influence of natural convection on directional solidification of Al–3.5wt% Ni and Al–7wt% Si alloys

Résumé

We present numerical simulations of thermosolutal convection for directional solidification of Al–3.5 wt% Ni and Al–7 wt% Si. Numerical results predict that fragmentation of dendrite arms resulting from dissolution could be favored in Al–7 wt% Si, but not in Al–3.5 wt% Ni. Corresponding experiments are in qualitative agreement with the numerical predictions. Distinguishing the two fragmentation mechanisms, namely dissolution and remelting, is critical during experiments on earth, when fluid flow is dominant.

Domaines

Matériaux

Dates et versions

hal-01728698 , version 1 (11-03-2018)

Identifiants

Citer

B. Zhou, H. Jung, Nathalie Mangelinck-Noel, H. Nguyen-Thi, Bernard Billia, et al.. Comparative study of the influence of natural convection on directional solidification of Al–3.5wt% Ni and Al–7wt% Si alloys. Advances in Space Research, 2008, 41 (12), pp.2112 - 2117. ⟨10.1016/j.asr.2007.06.038⟩. ⟨hal-01728698⟩
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