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pISSN : 1598-706X / eISSN : 2288-8381


한국주조공학회지 (10권6호 503-508)

Tensile Properties of Unidirectionally Solidified Al-CuAl_2 Eutectic Composite

일방향응고시킨 Al-CuAl_2 공정복합재료의 인장성질

Young-Hwan Hong*, Jong-Hwi Hong**

*suwon industrial college, ** Korea University


The effect of interlamellar spacing on tensile behavior and fracture mode at high temperatures has been studied for unidirectionally solidified Al-CuAl_2 eutectic composite. The tensile properties at room temperature in Al-CuAl_2 eutectic composite improved as the interlamellar spacing decreased due to the constraint effects of closely spaced lamellae, while the opposite behavior was observed at high temperatures due to the annihilation of the constraint effects by phase boundary sliding. The Al-CuAl_2 eutectic composite exhibited brittle fracture mode below the temperature at which the reinforcing phase softened but ductile fracture mode above the temperature.