Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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Microstructural Modification of High-Fe Containing A356 Alloy by Liquid Metal Shearing Process

용융금속 교반공정을 통한 고Fe 함유 A356 합금의 미세조직 개질

  • Kim, Bong-Hwan (Liquid metal processing & casting technology R&D group, Korea Institute of Industrial Technology) ;
  • Lee, Sang-Mok (Liquid metal processing & casting technology R&D group, Korea Institute of Industrial Technology)
  • 김봉환 (한국생산기술연구원 주조공정연구그룹) ;
  • 이상목 (한국생산기술연구원 주조공정연구그룹)
  • Received : 2011.09.23
  • Accepted : 2011.11.22
  • Published : 2011.12.31
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Abstract

The liquid metal shearing device was constructed and assembled with a commercial high-pressure die-caster in order to induce intensive turbulent shearing force on molten aluminum alloys. The effect of the liquid metal shearing on the microstructure and tensile properties of A356 alloys was investigated with the variation of iron content. The experimental results show that dendritic primary ${\alpha}$-Al phase was effectively modified into a equiaxed form by the liquid metal shearing. It was also found that the needle-like ${\beta}$-AlFeSi phase in a Fe containing A356 alloy was changed into a blocky shape resulting in the improved mechanical properties. Based on the mechanical properties, it was suggested that the iron content in A356 alloy could be more widely tolerated by utilizing the liquid metal shearing HPDC process.

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References

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