EFFECT OF REE ON THE SOLIDIFICATION OF НYPEREUTECTIC SILUMIN

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Abstract

The theories and mechanisms explaining the processes of primary silicon modification in hypereutectic silumins are considered. The processes of crystallization of hypereutectic silumin treated with rare-earth elements (REE): yttrium, ytterbium, samarium, erbium, lanthanum and neodymium have been studied. The temperatures of phase transformations and parameters taking into account the solid phase separation in the crystallization interval have been obtained. Differences in crystallization parameters and the nature of solid phase evolution in alloys modified with yttrium, ytterbium, samarium, erbium, cerium and neodymium are shown. It is concluded that further research is necessary to clarify the mechanism of modification of primary silicon in REE hypereutectic alloys.

About the authors

I. A Petrov

National Research University Moscow Aviation Institute

Email: petrovia2@mai.ru
Moscow, Russia

D. V Berezhnoy

National Research University Moscow Aviation Institute

Author for correspondence.
Email: petrovia2@mai.ru
Moscow, Russia

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