| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9795483 | Materials Science and Engineering: A | 2005 | 5 Pages |
Abstract
We investigated whether the nucleation of the eutectic islands in superalloy solidification occurs in the interdendritic bulk liquid or at the dendrite-melt interface. Directionally solidified samples of CMSX-4 and a model superalloy have been analysed by means of light and electron microscopy and by EBSD measurements. For some samples, the solid-melt interface has been revealed by an artificial bubble technique. Additionally, thermodynamic calculations on phase formation and nucleation work as well as phase-field simulations have been performed, using ThermoCalc and MICRESS. The results indicate a kind of epitaxial nucleation mechanism at the solid-liquid interface of the primary γ dendrites.
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Authors
N. Warnken, D. Ma, M. Mathes, I. Steinbach,