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Static Electropulsing-Induced Microstructural Changes and Their Effect on the Ultra-Precision Machining of Cold-Rolled AZ91 Alloy

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Abstract

The effects of electropulsing on the phase transformations of a cold-rolled Mg-9Al-1Zn alloy were studied using X-ray diffraction, back-scattered electron microscopy, transmission electron microscopy, and optical microscopy techniques. The results indicated that with increasing frequency of electropulsing, the decomposition and precipitation of β phase were tremendously accelerated sequentially. Electropulsing accelerated the decomposition of β phase by a factor of approximately 3600 times. The effects of the electropulsing-induced microstructural changes on machinability of the alloy, by single-point diamond turning, was discussed.

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Acknowledgments

The work described in this article was supported partially by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. PolyU 5316/09E).

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Authors and Affiliations

  1. State Key Laboratory in Ultra-Precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, P.R. China

    Duo Zhang (Postgraduate Student), Suet To (Associate Professor), Yao Hua Zhu (Senior Research Fellow) & Hao Wang (Research Assistant)

  2. Graduate School at ShenZhen, Tsinghua University, Beijing, 518055, P.R. China

    Guo Yi Tang (Professor)

Authors
  1. Duo Zhang
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  2. Suet To
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  3. Yao Hua Zhu
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  4. Hao Wang
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  5. Guo Yi Tang
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Corresponding author

Correspondence to Yao Hua Zhu.

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Manuscript submitted May 18, 2011.

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Zhang, D., To, S., Zhu, Y.H. et al. Static Electropulsing-Induced Microstructural Changes and Their Effect on the Ultra-Precision Machining of Cold-Rolled AZ91 Alloy. Metall Mater Trans A 43, 1341–1346 (2012). https://doi.org/10.1007/s11661-011-0955-x

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  • DOI: https://doi.org/10.1007/s11661-011-0955-x

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