Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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Effects of Mg Addition on Heat Treatment and Mechanical Properties of A356 Alloy

Mg 첨가에 따른 A356 합금의 열처리 및 기계적 특성 변화

  • Jo, Jae-Chan (Dept. of materials manufacturing processing, Gyeongsang National Univ.) ;
  • Kim, Kwang-Sam (Dept. of materials manufacturing processing, Gyeongsang National Univ.) ;
  • Im, In-Taek (Dept. of production engineering, Gyeongsang National Univ.) ;
  • Kim, Dae-Hwan (Dept. of materials manufacturing processing, Gyeongsang National Univ.) ;
  • Shim, Sung-Yong (Korea Aerospace Industries, Ltd.) ;
  • Lim, Su-Gun (Dept. of materials manufacturing processing, Gyeongsang National Univ.)
  • 조재찬 (경상대학교 재료공정융합공학과) ;
  • 김광삼 (경상대학교 재료공정융합공학과) ;
  • 임인택 (경상대학교 생산기술공학과) ;
  • 김대환 (경상대학교 재료공정융합공학과) ;
  • 심성용 (한국항공우주산업) ;
  • 임수근 (경상대학교 재료공정융합공학과)
  • Received : 2016.10.31
  • Accepted : 2016.11.28
  • Published : 2016.12.09
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Abstract

The effects of Mg addition on heat treatment and mechanical properties of A356 alloy were investigated. With increased amounts of Mg addition to A356 alloy, the grain size decreased and eutectic Si was refined. And, this process can improve the mechanical properties. Solid solution heat treatment causes the spheroidizing of eutectic Si. In this study, although eutectic Si was refined with Mg addition, solid solution time increased from 2 hours to 6 hours with Mg addition, and aging time also increased, from 4 hours to 8 hours. After heat treatment, Mg2Si remained in a formation of Chinese script. And, Chinese script Mg2Si formed with Mg addition caused a reduction of the elongation of the alloys according to the stress concentration.

Keywords

References

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