한국주조공학회지 (Journal of Korea Foundry Society)

  • 제37권1호
  • /
  • Pages.14-20
  • /
  • 2017
  • /
  • 1598-706X(pISSN)
  • /
  • 2288-8381(eISSN)
한국주조공학회 (Korea Foundry Society)
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AZ91-5wt.%Sn 마그네슘 합금의 열처리의 특성

Heat Treatment of AZ91-5wt.%Sn Magnesium Alloy

  • 김대환 (경상대학교 재료공정융합공학과) ;
  • 임수근 (경상대학교 재료공정융합공학과)
  • Kim, Dae-Hwan (Dept. of materials manufacturing processing, ERI, Gyeongsang National Univ.) ;
  • Lim, Su-Gun (Dept. of materials manufacturing processing, ERI, Gyeongsang National Univ.)
  • 투고 : 2016.10.22
  • 심사 : 2016.12.27
  • 발행 : 2017.02.28
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초록

The microstructure, electrical conductivity and hardness variation of an AZ91-5wt%Sn Mg alloy sample during a solid-solution and aging heat treatment were instigated by optical microscopy, scanning electron microscopy, X-ray diffraction and by Rockwell hardness techniques in this study. The XRD result shows that the main phases in the as-casted alloy are ${\alpha}$-Mg, $Mg_{17}Al_{12}$ and $Mg_2Sn$. From the SEM images of the AZ91-5wt%Sn Mg alloy after the solution treatment, the $Mg_{17}Al_{12}$ phases in the alloy were found to have dissolved into the matrix with an increase in the holding time during the solution treatment, but $Mg_2Sn$ phases were clearly observable. The highest peak hardness of the AZ91-5wt%Sn Mg alloy is 82HRE at an aging temperature of $200^{\circ}C$.

키워드

참고문헌

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