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Influence of Electric-Current Pulse Treatment on the Formation of Regular Eutectic Morphology in an Al-Si Eutectic Alloy

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Abstract

This article describes the influence of an electric current pulse (ECP) on the microstructure of an Al-Si eutectic alloy during directional solidification. Experimental results demonstrate that the ECP has a significant effect on the microstructure of the directionally solidified Al-Si eutectic alloy. Application of ECP can increase the number and area percentage of the complex regular structure (CRS). Furthermore, the area of single CRS increases first and then declines with the increase of the ECP density. Analysis results suggest that the change of the CRS is a result of the forced convection caused by Lorentz force and change of temperature gradient induced by the ECP. The growth process of the CRS is discussed.

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Acknowledgments

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (50701030 and 50734008). SEM analysis was made by the Instrumental Analysis & Research Center of Shanghai University.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Modern Metallurgy & Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, P.R. China

    Yunhu Zhang (Student), Changjiang Song (Associate Professor), Liang Zhu (Student), Hongxing Zheng (Associate Professor), Honggang Zhong (Student) & Qijie Zhai (Professor)

  2. Mechanical Engineering Technology Department, Purdue University, West Lafayette, IN, 47907-2021, USA

    Qingyou Han (Associate Professor)

Authors
  1. Yunhu Zhang
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  2. Changjiang Song
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  3. Liang Zhu
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  4. Hongxing Zheng
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  5. Honggang Zhong
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  6. Qingyou Han
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  7. Qijie Zhai
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Corresponding author

Correspondence to Changjiang Song.

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Manuscript submitted September 14, 2010.

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Zhang, Y., Song, C., Zhu, L. et al. Influence of Electric-Current Pulse Treatment on the Formation of Regular Eutectic Morphology in an Al-Si Eutectic Alloy. Metall Mater Trans B 42, 604–611 (2011). https://doi.org/10.1007/s11663-011-9502-9

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  • DOI: https://doi.org/10.1007/s11663-011-9502-9

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