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Effect of solidification parameters on the growth geometry of MC carbide in IN- 100 dendritic monocrystals

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Abstract

Several dendritic monocrystals of IN-100 were prepared under six growth conditions with thermal gradient,G, varying between 4.5 × l03 and 16 × 103 K/m and growth rate,R, be-tween 8.3 × 10-6 and 67 × 10-6 m/s. Three types of carbide were identified: the unmelted, the faceted and the Chinese script-type. The volume percent of faceted carbide increased with increasingG/R ratio whereas that of the Chinese script-type exhibited the inverse variation. The average faceted carbide size and the average spacing of the Chinese script-type carbide decreased with increasing cooling rate, (G ×R), The specific perimeter of the faceted carbide increased with increasing cooling rate, indicating that coarsening is responsible for final geometry of this carbide. Detailed composition measurements showed that the unmelted carbide is rich in titanium, whereas the faceted is rich in mo-lybdenum and vanadium.

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Authors and Affiliations

  1. Centre des Matériaux, Ecole National Supérieure des Mines de Paris, B.P. 87, 91003, Evry Cedex, France

    R. Fernandez (Graduate Student)

  2. Framatome, Chalon-sur-Saône, France

    J. C. LeComte (Metallurgist)

  3. Department of Metallurgy, Institute of Materials Science, University of Connecticut, 06268, Storrs, CT

    T. Z. Kattamis (Professor)

Authors
  1. R. Fernandez
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  2. J. C. LeComte
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  3. T. Z. Kattamis
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Fernandez, R., LeComte, J.C. & Kattamis, T.Z. Effect of solidification parameters on the growth geometry of MC carbide in IN- 100 dendritic monocrystals. Metall Trans A 9, 1381–1386 (1978). https://doi.org/10.1007/BF02661809

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  • DOI: https://doi.org/10.1007/BF02661809

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