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Precipitates and corrosion resistance of an Al–Zn–Mg–Cu–Zr plate with different percentage reduction per passes

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Abstract

7055 aluminum alloy plates with the same size were rolled by two processes: small percentage reduction per pass (PRPP) and large percentage reduction per pass, respectively. Meanwhile, the effect of PRPP on the precipitates and corrosion resistance of 7055 aluminum alloy plate was investigated. The mechanisms were analyzed and discussed by optical microscopy (OM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and electron back-scattered diffraction (EBSD) technique. Large PRPP can improve the corrosion resistance. For the plate rolled by small PRPP, the main precipitate is guinier–preston (GP) zone and continuous grain boundary precipitates (GBPs), while, for the plate rolled by large PRPP, the main precipitates are the GP zone and η′ precipitate, and the GBPs are discontinuous.

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Acknowledgements

This study was financially supported by the Higher School Science Foundation of Inner Mongolia (No. NJZZ16082), the National Natural Science Foundation of China (Nos. 51764043, 51461017 and 51364027) and the Science Program for Returned Chinese Scholars supported by Inner Mongolia and the Scientific and Technological Program of Innovation and Guidance of Inner Mongolia.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China

    Yu-Hao Liu, Liang-Ming Yan, Xiao-Hu Hou & Dong-Nan Huang

  2. Institute of Engineering and Research, Jiangxi University of Science and Technology, Ganzhou, 341000, China

    Jian-Bo Zhang

  3. State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for Nonferrous, Beijing, 100088, China

    Jian Shen

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  1. Yu-Hao Liu
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  2. Liang-Ming Yan
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Correspondence to Liang-Ming Yan.

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Liu, YH., Yan, LM., Hou, XH. et al. Precipitates and corrosion resistance of an Al–Zn–Mg–Cu–Zr plate with different percentage reduction per passes. Rare Met. 37, 381–387 (2018). https://doi.org/10.1007/s12598-017-0996-4

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  • DOI: https://doi.org/10.1007/s12598-017-0996-4

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