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직접가압주조한 Al-5%Ni-5%Mg-(Mm) 합금의 조직 및 기계적 성질에 미치는 가압력의 영향
우기도(Kee Do Woo),정동석(Dong Sug Chung),황인오(In O Hwang),김석원(Sug Won Kim) 한국주조공학회 2001 한국주조공학회지 Vol.21 No.2
Misch metal (rare earth element, Ce, La, Nd, Pr) which has large influence on high-temperature stability and toughness was added to the Al-5%Ni-5%Mg alloy, and squeeze casting was used for Al-5%Ni-5%Mg-(Mm) alloys. The effect of applied pressure and misch metal additions on mechanical properties in Al-5%Ni-5%Mg alloy by direct squeeze casting has been investigated. The applied pressure were 0㎫(gravity casting), 25, 50 and 75㎫. Squeeze-cast Al-5%Ni-5%Mg-(Mm) alloys had better mechanical properties than those of non-pressurized cast alloys because of the increased cooling rate by the application of pressure during solidification. By the addition of misch metal in Al-5%Ni-5%Mg alloy, better combination of strength and elongation was obtained. The addition of 0.3%Mm in Al-5%Ni-5%Mg alloy improved the heat resistant property due to the formation of fine eutectic phases.