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Effects of Pre-Deformation and Heat Treatment on the Microstructure and Mechanical Properties of Cu-2.5Be Sheets

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Abstract

This study investigated the effects of pre-deformation reduction and subsequent heat treatment on the microstructure and mechanical properties of Cu-2.5Be alloy. Twin formation mechanism and the strengthening contribution of boundaries and β particles were analyzed and discussed, and the results indicate that the following relative oriented relationship existed between the β and the surrounding α(Cu): (\(11\bar{1}\))α∥(110)β and [011]α∥[001]β. Meanwhile, the main formation mechanism of annealing twins in Cu-2.5Be alloy is “growth accidents.” Pre-deformation can significantly increase the yield strength of Cu-2.5Be alloy while maintaining good plasticity. The analysis of strengthening contributions indicated that the presence of twins and grain boundaries significantly improved the strength and ductility of the Cu-2.5Be alloy.

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Acknowledgments

This study was financially supported by the Natural science foundation of Hunan Province, China (Grant No. 2019JJ50587), the National Natural Science Foundation of China (Grant No. 51704258), and the Science and Technology Foundation of Taicang, China (Grant No. TC2019JC04 and TC2019GY19).

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Authors and Affiliations

  1. School of Mechanical Engineering, Xiangtan University, Xiangtan, 411105, China

    Yang Liu, Deshan Chen, Daibo Zhu & Xiaojin Liu

  2. School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore

    Yang Liu

  3. Kinkou Suzhou Co., Ltd., Taicang, 215400, China

    Daibo Zhu & Tan Han

  4. School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai, 264209, China

    Peng Zhang

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  1. Yang Liu
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  2. Deshan Chen
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  4. Xiaojin Liu
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  5. Tan Han
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  6. Peng Zhang
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Correspondence to Daibo Zhu or Peng Zhang.

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Liu, Y., Chen, D., Zhu, D. et al. Effects of Pre-Deformation and Heat Treatment on the Microstructure and Mechanical Properties of Cu-2.5Be Sheets. J. of Materi Eng and Perform 29, 5923–5932 (2020). https://doi.org/10.1007/s11665-020-05064-6

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  • DOI: https://doi.org/10.1007/s11665-020-05064-6

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