Abstract
Electromagnetic levitation and electron beam surface melting were employed to study the effects of supercooling and cooling rate on the solidification of Cu-10 wt pct Co alloys. Two major effects were observed in the supercooled alloys: the nucleation of a metastable copper-rich phase which contains 13 wt pct to 20 wt pct Co in samples supercooled between 105 and 150 K and liquid phase separation which occurs in samples supercooled 150 K or more. The microstructure of the electron beam melted surfaces consisted of very fine spheres which were similar to those of the sample supercooled more than 150 K but with a refined microstructure. The results indicate that a dynamic bulk supercooling of 150 K may exist in the molten pool during the solidification of electron beam melted surfaces.
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Munitz, A., Elder-Randall, S.P. & Abbaschian, R. Supercooling effects in Cu-10 Wt Pct Co alloys solidified at different cooling rates. Metall Trans A 23, 1817–1827 (1992). https://doi.org/10.1007/BF02804374
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DOI: https://doi.org/10.1007/BF02804374