High magnetic field induction of the formation of twinned dendrites during directional solidification of Al-4.5wt%Cu alloy

Xiaojian Li (1, 2) , Y. Fautrelle (1) , A. Gagnoud (1) , G.H. Cao (2) , Y.D. Zhang (3) , Z.M. Ren (2) , X.G. Lu (1) , C. Esling (3)

1 SIMaP - Science et Ingénierie des Matériaux et Procédés
2 Dept. Mat. Sci. Engn. Shangaï
3 LETAM - Laboratoire d'étude des textures et application aux matériaux

It is reported that the application of a high magnetic field is capable of inducing the formation of twinned dendrites during directional solidification of Al-4.5wt%Cu alloy. Numerical results reveal that a unidirectional thermoelectric magnetic force acts on tilted dendrites during directional solidification under a magnetic field. This force should be responsible for the formation of twinned dendrites. The work may initiate a new method for inducing twinned dendrites in Al-based alloys via an applied high magnetic field during directional solidification.

Domaines: Matériaux

Xiaojian Li, Y. Fautrelle, A. Gagnoud, G.H. Cao, Y.D. Zhang, et al.. High magnetic field induction of the formation of twinned dendrites during directional solidification of Al-4.5wt%Cu alloy. Philosophical Magazine Letters, 2014, 94 (3), pp.118-126. ⟨10.1080/09500839.2013.873549⟩. ⟨hal-01053239⟩