Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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Effect of Cerium on the Microstructure and Room Temperature Tensile Properties of Mg-4Al-2Sn-1Si Alloys

Mg-4Al-2Sn-1Si 합금의 조직 및 상온 인장 특성에 미치는 Ce의 영향

  • Kim, Jung-Hoon (Department of Materials Science and Engineering, Pusan National University) ;
  • Cho, Dae-Hyun (Department of Materials Science and Engineering, Pusan National University) ;
  • Park, Ik-Min (Department of Materials Science and Engineering, Pusan National University)
  • Received : 2012.11.13
  • Accepted : 2012.12.14
  • Published : 2012.12.31
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Abstract

Mg-Al-Sn-Si system alloy, as a promising cheap heat-resistant Mg alloy for automobile engine part, has been investigated. Refinement of microstructure and precipitation of thermally stable secondary phases are important goal for the design of heat-resistant Mg alloy. In this study, the effect of Ce on the microstructure and room temperature mechanical properties of Mg-Al-Sn-Si alloy was investigated. High thermally stable $Mg_2Si$ phases in Mg-Al-Sn-Si alloy is very useful intermetallic compound. However, the $Mg_2Si$ phases often result in poor mechanical properties due to the coarse chinese type $Mg_2Si$ phases. The experimental specimens were fabricated by fluxless melting under $CO_2+SF_6$ atmosphere and poured into the permanent pre-heated at $200^{\circ}C$. It was told that Ce addition can modify $Mg_2Si$ phases and refine microstructure and improve the tensile strength, yield strength and elongation.

Keywords

References

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