· Aleaciones ligeras ·
Jung-Pyung Choi†, *Tae-Woon Nam, and Eui-Pak Yoon
Research Institute of Steel Processing & Application (RISPA) *Hanyang Univ., Ansan, Korea
67th World Foundry Congress
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).
