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


(논문)연구논문

한국주조공학회지 (21권2호 127-134)

Effect of Pressure on Microstructures and Mechanical Properties in Al-5%Ni-5%Mg-(Mm) Alloy Manufactured by Direct Squeeze Casting

직접가압주조한 Al-5%Ni-5%Mg-(Mm)합금의 조직 및 기계적 성질에 미치는 가압력의 영향

Kee-Do Woo, Dong-Sug Chung*, In-O Hwang**, Sug-Won Kim

Chonbuk National Universit, *Chang-Won Polytechnic College, **ESAB SeAH corporation

Abstract

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 MPa(gravity casting), 25, 50 and 75 MPa. 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.

Keywords

Al-Ni-Mg alloy, Mish metal addition, Squeeze cast, Mechanical property, Microstructure