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