Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effect of Sn Addition on Creep Resistance of AZ91-0.4%Ca Alloy

AZ91-0.4%Ca 합금의 크립저항성에 미치는 Sn 첨가의 영향

  • Jun, Joong-Hwan (Advanced Fusion Process and Materials R&BD Group, Korea Institute of Industrial Technology)
  • 전중환 (한국생산기술연구원 융합공정 신소재연구 실용화그룹)
  • Received : 2014.04.22
  • Accepted : 2014.05.09
  • Published : 2014.07.30
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Abstract

The influences of small amount of Sn addition on microstructure and creep resistance of AZ91-0.4%Ca alloy have been investigated. The microstructure of the AZ91-0.4%Ca alloy was characterized by ${\alpha}$-(Mg) dendrite cells surrounded by eutectic ${\beta}(Mg_{17}Al_{12})$ and $Al_2Ca$ phases. The 0.5%Sn addition resulted in the formation of rod-shaped CaMgSn particles with the extinction of $Al_2Ca$. The Sn-containing alloy exhibited better creep resistance below $175^{\circ}C$, but the tendency was reversed above $200^{\circ}C$. The reason was discussed in relation to the change in thermal stability of ${\beta}$ phase in response to the Sn addition.

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References

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