The Effect of Electromagnetic Vibration on the Structure Control of A356 Alloy
The structural control of A356 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 A356 alloy in order to develop a new process of structural control in A356 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, a morphological change of the eutectic silicon from coarse platelet flakes to fine fiber shape is observed with EMV (Electro Magnetic Vibration) process at high frequency (≥500Hz).
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
J. P. Choi et al., "The Effect of Electromagnetic Vibration on the Structure Control of A356 Alloy", Materials Science Forum, Vols. 539-543, pp. 329-332, 2007