The Effect of Electromagnetic Vibration on the Structure Control of A356 Alloy

Abstract:

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).

• Periodical: Materials Science Forum (Volumes 539-543)
• Pages: 329-332
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.539-543.329
• Online since: March 2007
• Authors: Jung Pyung Choi, Tae Woon Nam, Eui Pak Yoon
• Keywords: A356 Aluminum Alloy, Aluminium Alloy, Electromagnetic, Eutectic Silicon, Vibration

References

[1] L.F. Mondolfo : Aluminum Alloy: Structure and Properties, Butterworth & Co., London, (1976).

[2] J.B. Andrews, M.V.C. Seneviratne : AFS Transactions, Vol. 92, (1984), 209.

[3] J.E. Gruzleski and B.M. Closset : The Treatment of Liquid Aluminum-Silicon Alloys", American Foundarymen, s Society, Inc. Des Plaines, Illinois, U.S.A., (1990), 19.

[4] B.M. Closset and J.E. Gruzleski : Metall. Trans. A, Vol. 13A, (1982), 945.

[5] R. S. Richards and Rostoker : The Thirty-Seventh Annual Convection of the Society, held in Philadelphia, October (1955), 17.

[6] B.E. Warren and E.P. Warekois ; Acta Metall., Vol. 3 (1955), 473.

[7] J. P. Choi, et al.: Mat. Sci. Forum Vols. 475-479 (2005), 409.