pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (26권5호 205-210)
A Study on the Structural Controlling of Al-Si Alloy by Using Electromagnetic Vibration
전자기 진동을 이용한 Al-Si 합금의 조직 제어에 관한 연구
Jung-Pyung C h o i, Ki-Bae K im *, Tae-Woon Nam **, Eui-Pak Yoon
Hanyang Univ., *KIST, **Hanyang Univ.
The structural control of Al-Si alloy, which was not studied among various electromagnetic processing of materials, was considered applying the alternating current and direct current magnetic flux density. The main aim of the present study is to investigate the effects of electromagnetic vibration on the macro and microstructure of Al-Si alloy in order to develop a new process of structural control in Al-Si alloy. When the electromagnetic vibration is conducted for changing the shape of primary aluminum, at low frequency(>60Hz), the shape of dendrite is changed speroidal shape. When the electromagnetic vibration is conducted for changing the shape of eutectic silicon, the fact that a morphological change of the eutectic silicon from coarse platelet flakes to fine fiber shape is observed and the improvement of the mechanical properties is achieved with EMV (Electro Magnetic Vibration) process at high frequency(>500Hz).
Aluminum alloy, Electromagnetic, Eutectic silicon, Vibration, Primary aluminum.