| タイトル | Supercooling effects in Cu-10 wt pct Co alloys solidified at different cooling rates |
| 著者（英） | Abbaschian, R.; Elder-Randall, S. P.; Munitz, A. |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 1992-06-01 |
| 言語 | eng |
| 内容記述 | 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. |
| NASA分類 | METALLIC MATERIALS |
| レポートNO | 92A41674 |
| 権利 | Copyright |
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