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Dendritic Growth in an Aluminum-Silicon Alloy

Author： Kaya H. Çadırlı E. Gündüz M.

Publisher： Springer Publishing Company

ISSN： 1059-9495

Source： Journal of Materials Engineering and Performance, Vol.16, Iss.1, 2007-02, pp. : 12-21

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Unidirectional solidification experiments have been carried out on an Al-3 wt.% Si alloy as a function of temperature gradient, G and growth rate, V. The samples were solidified under steady-state conditions with a constant growth rate of 8.20 μm/s at different temperature gradients (1.97-6.84 K/mm) and with a constant temperature gradient (6.84 K/mm) at different growth rates (8.20-492.76 μm/s). Microstructure parameters (primary dendrite arm spacing, λ₁, secondary dendrite arm spacing, λ₂, dendrite tip radius, R and mushy zone depth, d) were measured as a function of temperature gradient and growth rate. The experimental results have been compared with the current theoretical models and similar experimental works.

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