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Interdendritic Spacing: Part I. Experimental Studies

  • Symposium on Establishment of Microstructural Spacing during Dendritic and Cooperative Growth
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Abstract

Directional solidification experiments have been carried out in a succinonitrile-5.5 mol pct acetone system to characterize dendrite tip radius and interdendrite spacings as functions of growth rate and temperature gradient in the liquid. A maximum in primary dendrite spacing as a function of growth rate is observed, and this maximum is found to occur at the dendrite-cellular transition velocity. A scaling law is shown to exist between the secondary dendrite arm spacing, λ2, near the tip and the dendrite tip radius, p, which is λ2/ρ = 2.2 ± 0.3. Experimental results on ρ have been found to agree with the theoretical model based on the marginal stability criterion.

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Somboonsuk, K., Mason, J.T. & Trivedi, R. Interdendritic Spacing: Part I. Experimental Studies. Metall Trans A 15, 967–975 (1984). https://doi.org/10.1007/BF02644688

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  • DOI: https://doi.org/10.1007/BF02644688

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