Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Effects of Minor Alloying Elements on the Mechanical Properties and Formability of Mg-3%Zn-0.5%Sn Base Sheet Alloys

Mg-3%Zn-0.5%Sn계 판재합금의 기계적 성질과 성형성에 미치는 미량합금원소의 영향

  • Kim, Jeong-Min (Division of Advanced Materials Engineering, Hanbat National University) ;
  • Park, Joon-Sik (Division of Advanced Materials Engineering, Hanbat National University) ;
  • Kim, Ha-Young (Division of Advanced Materials Engineering, Hanbat National University) ;
  • Kim, Ki-Tae (Advanced Materials Development Center, Korea Institute of Industrial Technology)
  • 김정민 (한밭대학교 신소재공학부) ;
  • 박준식 (한밭대학교 신소재공학부) ;
  • 김하영 (한밭대학교 신소재공학부) ;
  • 김기태 (한국생산기술연구원 신소재본부)
  • Received : 2008.02.04
  • Accepted : 2008.02.29
  • Published : 2008.03.31
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Abstract

A variety of minor alloying elements such as Zr, Sr, Y, and Gd were added to Mg-3%Zn-0.5%Sn base alloy to form various fine precipitates and their effects on the microstructure, tensile properties, and sheet metal formability were investigated. Various very fine precipitates along with fine second phases were observed by the additions. It was found that Zr or Gd additive has a role to suppress the grain coarsening of alloy sheets during the hot working process. The Zr-added alloy showed the highest tensile elongation at $250^{\circ}C$ whereas the Gd-added alloy exhibited the best sheet metal forming characteristics in terms of CCV (conical cup value) and spring-back tendency.

Keywords

References

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