Effect of Electromagnetic Vibration on Solidification Structure of Al-Si Hypereutectic Alloy
The effect of electromagnetic vibration on the solidification structure of Al-18%Si hypereutectic alloy was studied. The results show that the electromagnetic vibration changes the growth of eutectic Si phase and primary Si phase. With the increase of the electromagnetic vibration, the shape of the Si phase experience a process of refinement. The initiative analysis shows that the refinement of the structure due to super-cooling of the element and the reduction of the temperature gradient of the front of the solid liquid inter-face as well as the hindrance of electromagnetic braking effect to the movement of Si free particles.