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Primary dendrite spacing and the effect of off-axis heat flow

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Abstract

The primary dendrite arm spacing in succinonitrile-1.4 and 4.7 wt pet water alloys has been measured as a function of growth velocity and orientation with respect to the applied temperature gradient. The spacing was found to increase with angles from 0 to 40 deg at constant composition, growth velocity, and temperature gradient. From 50 to 70 deg, the secondary arms assumed the role of primaries (growing perpendicular to the traction drive direction), and the spacing rapidly decreased. The results are correlated geometrically, and some possible applications are suggested.

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Authors and Affiliations

  1. Center for the Space Processing of Engineering Materials, Vanderbilt University, 37235, Nashville, TN

    R. N. Grugel (Research Assistant Professor)

  2. Northwestern Polytechnical University, Xian, Shaanxi Province, China

    Y. Zhou (Professor of Metallurgical Engineering)

Authors
  1. R. N. Grugel
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  2. Y. Zhou
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R. N. Grugel, formerly Visiting Researcher at Northwestern Polytechnical University, Xian, China

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Grugel, R.N., Zhou, Y. Primary dendrite spacing and the effect of off-axis heat flow. Metall Trans A 20, 969–973 (1989). https://doi.org/10.1007/BF02651662

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  • DOI: https://doi.org/10.1007/BF02651662

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