| Title |
A Study on the Dendrite Structure in Al - Cu Binary Alloys by Unidirectional Solidification |
| Authors |
김명호(Myung Ho Kim); 윤종규(Jong Kyu Yoon); 한봉희(Bong 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. |