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Influence of Solidification Parameters on the Microstructure of Rapidly Quenched Fe-Ni-B Alloys

Published online by Cambridge University Press:  15 February 2011

Uwe KÖster
Affiliation:
Abt. Chemietechnik, Universitāt Dortmund D - 4600 Dortmund, F.R.Germany
Ursula Herold
Affiliation:
Institut für Werkstoffe, Ruhr-Universitāt Bochum D -4630 Bochum, F.R.Germany
Dieter Krause
Affiliation:
Institut für Werkstoffe, Ruhr-Universitāt Bochum D -4630 Bochum, F.R.Germany
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Abstract

The microstructure of Fe-Ni-B alloys rapidly quenched by melt spinning has been investigated by means of light and electron microscopy. Depending on the surface velocity of the quenching wheel and the boron concentration a large variety of microstructures has been observed: increased solubility of boron, microstructures with different metastable crystalline compounds or metallic glasses.

Plotting the as-cast microstructures versus the quenching rate has been found to be very useful for arranging the large amount of results and/or for predicting particular microstructures. Due to an extremely large gradient in the microstructure across the ribbon thickness this method of forming particular microstructures seems to be only of limited advantage. Controlled crystallization reactions of metallic glasses result in different, but more homogeneous microstructures.

Type
Research Article
Copyright
Copyright © Materials Research Society 1982

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References

1)Köster, U., Herold, U., in: Glassy Metals I, Güntherodt, H.J., Beck, H. eds., Topics in Applied Physics, Vol. 46 (1981), p. 22510.1007/3540104402_10Google Scholar
2)Ray, R., Hasegawa, R., J.appl.Phys. 49 (1978), 4174Google Scholar
3)Herold, U., Köster, U., Z.Metallkunde 69 (1978), 326Google Scholar
4)Franke, H., Herold, U., Köster, U., Rosenberg, M., Proc.Conf. on Rapidly Quenched Metals III, Brighton 1978, Vol. I, p.155Google Scholar
5)Choo, W.K., Kaplow, R., Metals Trans. 8A (1977), 41710.1007/BF02661750Google Scholar
6)Cadeville, M.C., Kaul, G., Lapierre, M.F., Lerner, C., Ph.Maitrepierre, Proc.Conf. on Rapidly Quenched Metals IICambridge/Boston1976, p.143Google Scholar
7)Franke, H.-G., Köster, U., Schroeder, H.-W., Müller, J., MRS-meeting, Boston 1981, this volumeGoogle Scholar

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