발간논문

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Vol.13, No.3, 282 ~ 290, 1975
Title
A Study on the Dendrite Structure in Al - Cu Binary Alloys by Unidirectional Solidification
김명호Myung Ho Kim, 윤종규Jong Kyu Yoon, 한봉희Bong Hee Hahn
Abstract
The effect of local solidification time(θ_f) and solute contents on the secondary dendrite arm spacing(d), and the effect of solute contents and cooling rate on the dendrite morphology transition in the hypoeutectic constitution of Al-Cu binary alloys by unidirectional solidification have been studied. And the following relationship is obtained; d=K·θ_f^(0.37) where, K is varied by the solute contents. The critical Cu contents where the dendrite morphology changes from plate-like to rod-like moved from high solute contents to low solute contents as the cooling rate increased. This fact was interpreted in terms of constitutional supercooling.
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