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An Innovative Two-Stage Reheating Process for Wrought Aluminum Alloy During Thixoforming

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Abstract

An innovative two-stage reheating process has been developed to improve the thixotropic behavior of semi-solid wrought aluminum alloy during thixoforming. The variation of the microstructural evolution mechanisms with temperature and holding time during a traditional process and two-stage reheating process are presented in this paper. A preferred semi-solid microstructure with spherical-like grains surrounded by a uniform liquid film was obtained in the two-stage reheating process. The semi-solid microstructure obtained via this two-stage reheating process had a number of features beneficial for semi-solid metal processing, including smaller equivalent diameters, a higher degree of sphericity, a lower coarsening rate constant of solid grains and a reduced amount of entrapped liquid compared with that produced by the traditional reheating process. These results indicate that the two-stage reheating process is a promising method for manufacturing wrought aluminum alloy during thixoforming.

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Acknowledgments

This work was supported by the National Natural Science Foundation Project of China (51374109).

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Authors and Affiliations

  1. The Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, P.R. China

    JiaoJiao Wang (Research Assistant) & GuiMin Lu (Professor)

  2. School of Mechanical and Manufacturing Engineering, Dublin City University, Dublin 9, Ireland

    D. Brabazon (Professor)

  3. Advanced Processing Technology Research Centre, Dublin City University, Dublin 9, Ireland

    D. Brabazon (Professor)

  4. Schools of Engineering, University of British Columbia, Kelowna, BC, V1V1V7, Canada

    A. B. Phillion (Assistant Professor)

Authors
  1. JiaoJiao Wang
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  2. D. Brabazon
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  3. A. B. Phillion
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  4. GuiMin Lu
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Corresponding author

Correspondence to GuiMin Lu.

Additional information

Manuscript submitted October 11, 2014.

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Wang, J., Brabazon, D., Phillion, A.B. et al. An Innovative Two-Stage Reheating Process for Wrought Aluminum Alloy During Thixoforming. Metall Mater Trans A 46, 4191–4201 (2015). https://doi.org/10.1007/s11661-015-2990-5

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