Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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Effect of Fe and Mn Contents on the Tensile Property of Al-9%Si-0.3%Mg Alloy for High Pressure Die Casting

고압 금형주조용 Al-9%Si-0.3%Mg 합금의 Fe, Mn 함량이 인장특성에 미치는 영향

  • Kim, Heon-Joo (Dept of Metallurgical Eng., Pukyong National Univ.)
  • 김헌주 (부경대학교 공과대학 금속공학과)
  • Received : 2010.10.08
  • Accepted : 2011.01.10
  • Published : 2011.02.28
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Abstract

Effect of Fe and Mn contents on the tensile properties has been studied in Al-9wt%Si-0.3wt%Mg alloy. As Fe content of Al-9wt%Si-0.3wt%Mg-0.5wt%Mn alloy increased from 0.15wt% to 0.45wt%, tensile strength of as-cast alloy decreased from 192 MPa to 174 MPa, and elongation of the alloy also decreased from 4.8% to 4.2%. Decrease of these properties can be explained as the formation of plate shape, ${\beta}-Al_5FeSi$ phase with high Fe/Mn ratio of the alloy. However when Mn content of Al-9wt%Si-0.3wt%Mg-0.45wt%Fe alloy increased from 0.3wt% to 0.5wt%, tensile strength of T6 aged alloy increased from 265 MPa to 275 MPa, and elongation of the alloy increased from 2.3% to 3.6%. These improvements attribute to chinese script, ${\alpha}-Al_{15}(Mn,Fe)_3Si_2$ phase shape-modified from ${\beta}-Al_5FeSi$ phase with low Fe/Mn ratio of the alloy.

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References

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