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SOLIDIFICATION CHARACTERISTICS AND MICROSTRUCTURAL EVOLUTION OFZn-1.26wt.%AlALLOY

Author

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  • MEVLÜT ŞAHİN

    (Department of Physics, Faculty of Arts and Sciences, Niğde University, Niğde, Turkey)

  • EMİN ÇADIRLI

    (Department of Physics, Faculty of Arts and Sciences, Niğde University, Niğde, Turkey)

Abstract

Zn–1.26wt.%Alalloy was directionally solidified upward with a constant growth rate(V = 16.6 μm/s)in a wide range of temperature gradients(G = 1.94–5.15 K/mm)and with a constant temperature gradient(G = 5.15 K/mm)in a wide range of growth rates(V = 8.3–500 μm/s)with a Bridgman-type directional solidification furnace. Microstructure parameters, the primary dendrite arm spacing (λ1), secondary dendrite arm spacing (λ2) and dendrite tip radius(R), were measured and expressed as functions ofGandVby using a linear regression analysis method. It was found that the values of λ1, λ2andRdecrease with increasing values ofVandG. The experimental results were compared with the main predictive theoretical and experimental works for dendritic spacings.

Suggested Citation

  • Mevlüt Şahi̇n & Emi̇n Çadirli, 2011. "SOLIDIFICATION CHARACTERISTICS AND MICROSTRUCTURAL EVOLUTION OFZn-1.26wt.%AlALLOY," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 18(06), pages 281-288.
    • Handle: RePEc:wsi:srlxxx:v:18:y:2011:i:06:n:s0218625x1101476x
    DOI: 10.1142/S0218625X1101476X
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