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Effect of Manganese on the Formation of Fe-rich Phases in Electromagnetic Stirred Hypereutectic Al-22Si Alloy with 2 % Fe

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Abstract

The effect of Mn on the microstructure of electromagnetic stirred hypereutectic Al-22Si-2Fe (% w/w) alloys was studied. The results show that the alloy with a Mn/Fe ratio zero, contained plentiful α-Al4FeSi2 phases existing as mainly intermetallic compounds in the solidified microstructures by electromagnetic stirring (EMS) process. With EMS process, the alloy with 0.61 % Mn contained acicular β-Al5(Fe, Mn)Si, δ-Al4(Fe, Mn)Si2 and blocky α-Al15(Fe, Mn)3Si2 phases in the solidification microstructure of the stirred A1 alloy. As the Mn/Fe ratio increased to 1, intermetallic compounds were mainly in the form of blocky and fine α-Al15(Fe, Mn)3Si2 phases in the microstructure. The intermetallic compounds were examined with an optical microscope, scanning electron microscope, and X-ray diffraction. The acicular δ-Al4(Fe, Mn)Si2 and blocky α-Al15(Fe, Mn)3Si2 phases were also analyzed by transmission electron microscopy.

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Acknowledgments

The authors acknowledge funding for this research from National Science Foundation of China (51261011), Science and Technology Project Foundation of Yunnan Province of China (2010DH025), and Personnel Training Project of Yunnan Province of China (2009CI024). This work is supported by the Institute of Advanced Materials Processing, Kunming University of Science and Technology, Kunming, China.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650039, China

    Lu Li, Rongfeng Zhou, Yehua Jiang, Xiuchang Wang & Rong Zhou

  2. Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming, 650039, China

    Rongfeng Zhou

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  1. Lu Li
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  2. Rongfeng Zhou
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  3. Yehua Jiang
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  4. Xiuchang Wang
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  5. Rong Zhou
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Correspondence to Rongfeng Zhou.

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Li, L., Zhou, R., Jiang, Y. et al. Effect of Manganese on the Formation of Fe-rich Phases in Electromagnetic Stirred Hypereutectic Al-22Si Alloy with 2 % Fe. Trans Indian Inst Met 67, 861–867 (2014). https://doi.org/10.1007/s12666-014-0414-7

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  • DOI: https://doi.org/10.1007/s12666-014-0414-7

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