Effects of High Frequency Electromagnetic Field on Improving Macro/Micro Structure and Reducing Segregation for Aluminium Alloy Billets

Abstract:

Article Preview

By imposing a high frequency magnetic field, the surface quality and macro/micro structure of the direct chill cast billets are improved. The casting speed can also be improved by simultaneous applying mold and electromagnetic coil, especially for the alloys with a wide freezing range such as Al-Cu-Mg alloy. The extent of macrosegregation in the Al-Cu-Mg alloy is reduced by application of the magnetic field. Moreover, the inverse segregation layer usually observed in the direct chill cast billet is eliminated by the effect of the electromagnetic field. The microstructure of the hot-rolled and heat treated billets cast under the high frequency field also show better characteristics.

Info:

Periodical:

Materials Science Forum (Volumes 519-521)

Edited by:

W.J. Poole, M.A. Wells and D.J. Lloyd

Pages:

1759-1764

DOI:

10.4028/www.scientific.net/MSF.519-521.1759

Citation:

H. Hao et al., "Effects of High Frequency Electromagnetic Field on Improving Macro/Micro Structure and Reducing Segregation for Aluminium Alloy Billets", Materials Science Forum, Vols. 519-521, pp. 1759-1764, 2006

Online since:

July 2006

Export:

Price:

$35.00

[1] J.F. Grandfield and P.T. McGlade: Materials Forum, Vol. 20 (1996), p.29.

[2] J.F. Grandfield, K. Goodall, P. Misic and X. Zhang: Light Metals 1997, ed. by R. Huglen, The Minerals, Metals & Materials Society, Orlando, (1997), p.1081.

[3] W.J. Snyder, J.L. Kirby and S.A. Levy: Light Metals 1989, ed. by P.G. Campell, The Minerals, Metals & Materials Society, Las Vegas, (1989), p.853.

[4] N.B. Bryson: Proceedings of the F. Weiberg international symposium on solidification process, ed. by J.E. Lait and I.V. Samarasekera, Pergmon Press, New York, (1990), p.69.

[5] S.W. Kim, H. Hao, U.J. Lee, K.D. Woo and J.Z. Jin: Materials Transactions, Vol. 42 (2001), p. (1952).

[6] J.W. Evans: Metall. Mater. Trans. B, Vol. 26 (1995), p.189.

[7] M.C. Flemins: Solidification processing (McGraw-Hill, Inc., New York 1974), p.154.

[8] A.V. Reddy and C. Beckermann: Metall. Mater. Trans. B, Vol. 28 (1997), p.479.

[9] A. Mo, T.E. Johnsen, B.R. Henriken and E.K. Jensen: Light Metals 1994, ed. by U. Mannweiler, The Minerals, Metals & Materials Society, San Francisco, (1994), p.889.

In order to see related information, you need to Login.