Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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Effect of Alloying Elements on Creep Behavior of Mg-Al Alloys

Mg-Al 합금의 크리프 거동에 미치는 합금원소의 영향

  • Lim, Hyun-Kyu (Foundry Technology Center, Korea Institute of Industrial Technology) ;
  • Kim, Shae-K. (Foundry Technology Center, Korea Institute of Industrial Technology) ;
  • Kim, Do-Hyang (Department of Materials Science and Engineering, Yonsei University)
  • 임현규 (한국생산기술연구원 주조기술센터) ;
  • 김세광 (한국생산기술연구원 주조기술센터) ;
  • 김도향 (연세대학교 신소재공학과)
  • Received : 2012.01.18
  • Accepted : 2012.02.22
  • Published : 2012.02.29
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Abstract

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.

Keywords

References

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