Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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The Influence of Alloying Elements on the Fluidity of Al-Zn-Mg Alloys

Al-Zn-Mg계 알루미늄 합금의 유동성에 미치는 합금원소의 영향

  • Cho, Jea-Sup (Dept. of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Kim, Jee-Hun (Dept. of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Sim, Woo-Jeong (Dept. of Advanced Materials Engineering, Korea Polytechnic University) ;
  • Im, Hang-Joon (Dept. of Advanced Materials Engineering, Korea Polytechnic University)
  • 조재섭 (한국산업기술대학교 신소재공학과) ;
  • 김지훈 (한국산업기술대학교 신소재공학과) ;
  • 심우정 (한국산업기술대학교 신소재공학과) ;
  • 임항준 (한국산업기술대학교 신소재공학과)
  • Received : 2012.03.30
  • Accepted : 2012.05.09
  • Published : 2012.06.30
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Abstract

Al-Zn-Mg alloys, being high strength aluminum alloys, have attracted attention as a material of automobile parts that require higher mechanical properties and lightness. Automobile parts with complex shapes are manufactured by low-priced casting method, but Al-Zn-Mg alloys are difficult to cast because of its poor hot cracking, feeding, and fluidity. Thus fluidity experiments on Al-Zn-Mg alloys were conducted for the castability evaluation. The effects of Mg and Zn, representative elements of Al-Zn-Mg alloys, on fluidity were observed. Spiral mold was used for fluidity experiments and the lengths of solidified specimens were measured after melting and gravity casting. Correlation between microstructures and fluidity length based on the alloy composition was considered. According to the experimental results, as the amount of Mg and Zn increased, fluidity decreased. Also, it was confirmed that fluidity change by the variation of Mg composition was greater than that of Zn.

Keywords

References

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