pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (32권1호 44-49)
Effect of Alloying Elements on Creep Behavior of Mg-Al Alloys
Mg-Al 합금의 크리프 거동에 미치는 합금원소의 영향
Hyun-Kyu Lim, Shae K. Kim, Do-Hyang Kim*
Korea Institute of Industrial Technology, *Yonsei University,
In this study, three magnesium alloys were investigated; those are 1.5wt.% CaO added AM80, 1.0wt.% CaO added AM60, and conventional MRI153 alloys. Test specimens of three alloys were prepared by re-melting and casting into steel mold with ingots and machining. The mechanical properties and the creep behavior at 150 degrees Celsius of these specimens were determined and their microstructures were characterized using OM and SEM. For the application to die- casting, fluidity test were carried out with spiral mold. Compared with 1.0wt.% CaO added AM60 alloy, 1.5wt.% CaO added AM80 alloy exhibited good creep properties in all test conditions. Moreover, CaO added alloys showed better creep properties than MRI153 alloy at lower load condition. It is proposed that 1.5wt.% CaO added AM80 alloy is useful to apply to power-train parts such as transmission case in vehicles.
Mg-Al alloy system, Effect of CaO addition, Creep properties, Tensile test, Fluidity test.