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Mushy-zone rayleigh number to describe macrosegregation and channel segregate formation during directional solidification of metallic alloys

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Abstract

A recently defined mushy-zone Rayleigh number (RaM) that includes side-branching contributions to the mushy-zone permeability has been examined for its correlation with the longitudinal macrosegregation and channel segregate formation. The Rayleigh number shows (1) a strong correlation between the extent of longitudinal macrosegregation and increase in the mushy-zone convection and (2) a good ability to predict the formation of channel segregates during directional solidification.

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Author notes

  1. G. Magadi (Research Associate, Senior Engineer)

    Present address: Chemical Engineering Department, Cleveland State University, USA

Authors and Affiliations

  1. the Chemical and Biomedical Engineering Department, Cleveland State University, 44115, Cleveland, OH

    S. N. Tewari (Professor) & R. Tiwari (Graduate Student)

  2. American Bureau of Shipping, 77060, Houston, TX

    G. Magadi (Research Associate, Senior Engineer)

Authors
  1. S. N. Tewari
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  2. R. Tiwari
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  3. G. Magadi
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Tewari, S.N., Tiwari, R. & Magadi, G. Mushy-zone rayleigh number to describe macrosegregation and channel segregate formation during directional solidification of metallic alloys. Metall Mater Trans A 35, 2927–2934 (2004). https://doi.org/10.1007/s11661-004-0240-3

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  • DOI: https://doi.org/10.1007/s11661-004-0240-3

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