발간논문

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Vol.26, No.7, 670 ~ 680, 1988
Title
The Study on the high Temperature behavior of Al - CuAl2 Eutectic
이현규Hyun Kyoo Lee, 김영수Young Joo Kim, 홍영환Young Hwan Hong, 홍종휘Jong Hwi Hong
Abstract
The effect of interlamellar spacing on microstructural stability, tensile behavior and fracture mode at high temperature has been studied for unidirectionally solidified Al-CuAl₂ eutectic. The results of isothermal heat treatments showed the higher coarsening rate at 520℃ than at 450℃. It was observed that the decrease of interface area(Δ5) was inversely proportional to the square of the interlamellar spacing(λ²). Therefore, it can be seen that the microstructural stability at high temperature improves as the interlamellar spacing increases. The tensile properties at high temperature improved as the interlamellar spacing increased, which is opposite behavior at room temperature. The Al-CuAl₂eutectic exhibited brittle fracture mode below the temperature at which the reinforcing materials softened but ductile fracture mode above the temperature.
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