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Study of the Effect of Er on the Homogenization of 6061 Twin-Roll Casting Sheet

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Abstract

The twin-roll casting (TRC) method was used to prepare 6061 plates with a content of 0.4 wt.% Er. The refining influence of Er on the homogenization process of the 6061 plates was studied by means of metallographic observation, scanning electron microscopy, transmission electron microscopy, and energy spectrum analysis. The results show that during the homogenization process, Mg2Si dissolves, and Si can be easily combined with Er to form the AlSiEr eutectic compound, and the refining effect is significant. The addition of Er can obviously promote the homogenization process of the 6061 TRC plates and shorten its duration from 12 to 6 h. The nanoscale Al3Er second phase dispersedly precipitates in the matrix and gives rise to pinning dislocations and subgrain boundaries, which improve the comprehensive properties of the 6061 TRC plates after homogenization. After homogenization, the tensile strength, yield strength, and elongation increased by 22.66 MPa, 17.64 MPa, and 4.91%, respectively, compared with those of the 6061 cast-rolled plate without Er.

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Notes

  1. 5E61 aluminum alloy is registered by Beijing University of Technology, the alloy is based on the Russian grade 1561 aluminum alloy, through the compound addition of Er, Zr, improves the recrystallization temperature of aluminum alloy, is conducive to high temperature molding and stable annealing process implementation, and can effectively improve the strength of aluminum alloy, heat resistance and weldability, and other comprehensive properties.

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Acknowledgments

This work was supported by the Natural Science Foundation of China (No.51874172, No.52104377). The author would like to thank Dr. Song H for his assistance in NF6-300 twin-roll casting.

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Authors and Affiliations

  1. School of Material and Metallurgy, University of Science and Technology Liaoning, Anshan, China

    Shuangyong Tian, Su Luan, Zhen Xu, Hongbin Wang, Yutao Li & Dong Wang

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  1. Shuangyong Tian
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  2. Su Luan
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  3. Zhen Xu
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  4. Hongbin Wang
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  5. Yutao Li
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  6. Dong Wang
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Correspondence to Zhen Xu or Hongbin Wang.

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Tian, S., Luan, S., Xu, Z. et al. Study of the Effect of Er on the Homogenization of 6061 Twin-Roll Casting Sheet. J. of Materi Eng and Perform 32, 4911–4921 (2023). https://doi.org/10.1007/s11665-022-07441-9

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  • DOI: https://doi.org/10.1007/s11665-022-07441-9

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