Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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The Effects of Mn and Cr Additions on the Microstructure of A356 Alloys Containing Impure Fe

불순 Fe를 함유한 A356 주조합금에서 미세조직 형성에 관한 Mn과 Cr의 효과

  • Han, Sang-Won (Applied Science Research Institute, Korea Advanced Institute of Science and Technology)
  • 한상원 (한국과학기술원 응용과학연구소)
  • Published : 2005.06.20
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Abstract

The effects of Mn and Cr on the crystallization behaviors of Fe-bearing intennetallics in A356 alloy were studied. Coarse and acicular ${\beta}-Al_{5}$FeSi phase in A356-0.20wt.%Fe alloy was modified into small ${\alpha}$-Al(Fe,Mn)Si and ${\alpha}$-Al(Fe,Cr)Si phases in response to Mn and Cr addition, respectively. Increasing of Mn addition amount elevates the crystallizing temperature of ${\alpha}$-Al(Fe,Mn)Si and the Mn/Fe ratio in the ${\alpha}$-Al(Fe,Mn)Si. Cr is more effective to modify ${\beta}-Al_{5}$FeSi in comparison with Mn. ${\alpha}$-Al(Fe,Mn)Si phase had BCC/SC dual structure.

Keywords

References

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