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Mushy zone morphology during directional solidification of Pb-5.8 wt pct Sb alloy

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Abstract

The Pb-5.8 wt pct Sb alloy was directionally solidified with a positive thermal gradient of 140 K cm−1 at a growth speed ranging from 0.8 to 30 µm s−1, and then it was quenched to retain the mushy zone morphology. The morphology of the mushy zone along its entire length has been characterized by using a serial sectioning and three-dimensional image reconstruction technique. Variation in the cellular/dendritic shape factor, hydraulic radius of the interdendritic region, and fraction solid along the mushy zone length has been studied. A comparison with predictions from theoretical models indicates that convection remarkably reduces the primary dendrite spacing while its influence on the dendrite tip radius is not as significant.

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Author notes

  1. S. N. Ojha (Visiting Professor, Professor)

    Present address: the Chemical Engineering Department, Cleveland State University, 44115, Cleveland, OH

Authors and Affiliations

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

    L. Yu (Graduate Student), G. L. Ding (Research Associate), J. Reye (Undergraduate Student) & S. N. Tewari (Professor)

  2. Metallurgical Engineering Department, Banaras Hindu University, Varanasi, India

    S. N. Ojha (Visiting Professor, Professor)

Authors
  1. L. Yu
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  2. G. L. Ding
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  3. J. Reye
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  4. S. N. Tewari
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  5. S. N. Ojha
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Yu, L., Ding, G.L., Reye, J. et al. Mushy zone morphology during directional solidification of Pb-5.8 wt pct Sb alloy. Metall Mater Trans A 31, 2275–2285 (2000). https://doi.org/10.1007/s11661-000-0144-9

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  • DOI: https://doi.org/10.1007/s11661-000-0144-9

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