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Microstructure and Mechanical Properties of AA1235 Aluminum Foil Stocks Produced Directly from Electrolytic Aluminum Melt

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Abstract

A new process is developed to obtain high-quality AA1235 aluminum foil stocks and to replace the traditional manufacture process. During the new manufacture process, AA1235 aluminum sheets are twin-roll casted directly through electrolytic aluminum melt (EAM), and subsequently the sheets are processed into aluminum foil stocks by cold rolling and annealing. Microstructure and mechanical properties of the AA1235 aluminum sheets produced through such new process are investigated in each state by optimal microscope, scanning electron microscopy, X-ray diffraction, orientation imaging microscopy, transmission electron microscopy, etc. The results show that compared with the traditional AA1235 aluminum foil stocks produced through re-melted aluminum melt (RAM), the amount of impurities is decreased in the EAM aluminum foil stocks. The EAM aluminum foil stock obtains less β-FeSiAl5 phases, but more α-Fe2SiAl8 phases. The elongation of EAM aluminum foil stocks is improved significantly owing to more cubic orientation. Especially, the elongation value of the EAM aluminum foil stocks is approximately 25 pct higher than that of the RAM aluminum foil stocks. As a result, the EAM aluminum foil stocks are at an advantage in increasing the processing performance for the aluminum foils during subsequent processes.

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Acknowledgment

The authors acknowledge with gratitude the financial support received from the Fundamental Research funds (2014zzts019) of Central South University.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Central South University, Changsha, 410083, China

    Hanqing Xiong (Doctoral Candidate), Kun Yu (Professor), Li Wen (Master Degree Candidate) & Yilong Dai (Doctoral Candidate)

  2. Zhengzhou Research Institute of CHALCO, Zhengzhou, 450041, China

    Sujuan Yao (Professorate Senior Engineer)

  3. Chinalco Ruimin Co., Ltd, Fuzhou, 350015, China

    Sujuan Yao (Professorate Senior Engineer)

  4. School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China

    Zhifeng Wang (Lecturer)

Authors
  1. Hanqing Xiong
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  2. Kun Yu
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  3. Li Wen
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  4. Sujuan Yao
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  5. Yilong Dai
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  6. Zhifeng Wang
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Corresponding author

Correspondence to Kun Yu.

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Manuscript submitted January 30, 2015.

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Xiong, H., Yu, K., Wen, L. et al. Microstructure and Mechanical Properties of AA1235 Aluminum Foil Stocks Produced Directly from Electrolytic Aluminum Melt. Metall Mater Trans B 47, 731–739 (2016). https://doi.org/10.1007/s11663-015-0463-2

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  • DOI: https://doi.org/10.1007/s11663-015-0463-2

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