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cellular microstructure of chill block melt spun Ni-Mo alloys

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Abstract

Chill block melt spun ribbons of Ni-Mo binary alloys containing 8.0 to 41.8 wt Pct Mo have been prepared under carefully controlled processing conditions. The growth velocity has been determined as a function of distance from the quench surface from the observed ribbon thickness dependence on the melt puddle residence time. Primary arm spacings measured at the mid ribbon thickness locations show a dependence on growth velocity and alloy composition which is expected from dendritic growth models for binary alloys directionally solidified in a positive temperature gradient. Microsegregation across cells and its variation with distance from the quench surface and alloy composition have been examined and compared with theoretical predictions.

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Authors and Affiliations

  1. Department of Chemical Engineering, Cleveland State University, 44115, Cleveland, OH

    S. N. Tewari (Associate Professor)

  2. Microgravity Materials Science Laboratory, MS 105-1, NASA-Lewis Research Center, 44135, Cleveland, OH

    T. K. Glasgow (Manager)

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  1. S. N. Tewari
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  2. T. K. Glasgow
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Tewari, S.N., Glasgow, T.K. cellular microstructure of chill block melt spun Ni-Mo alloys. Metall Trans A 18, 1663–1678 (1987). https://doi.org/10.1007/BF02646150

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  • DOI: https://doi.org/10.1007/BF02646150

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