| Title |
Solidification : Effects of Electromagnetic Vibration on Solidification Structure of A1 - Si Alloys |
| Authors |
이준수(Jun Su Lee),오영주(Young Joo Oh),조영환(Young Whan Cho),정순효(Soon Hyo Chung),김도향(Do Hyang Kim) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
The effects of electromagnetic vibration on solidification structures were investigated in Al-Si alloys. In the hypo-eutectic alloy, the grain size decreased and dendrites were fragmented into globoid with increasing frequency(Hz) and amplitude(A) of the electromagnetic vibration. This would be resulted from the disappearance of the constitutional supercooling and remelting of dendrite stems by the vibration of liquid phase. In the hyper-eutectic alloy, it is found that the variation of the vibration frequency did not change the particle size of Si primary crystals significantly. As the vibration intensity increased, the segregation of Si primary near the side wall increased and the Si crystals in eutectic structure have changed from flake to fibrous morphology. |