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Asymmetrical Precipitation on the {10-12} Twin Boundary in the Magnesium Alloy

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Abstract

Precipitation on deformation defects is essential for enhancing mechanical properties of age-hardenable alloys. In this work, we revealed how {10-12} twin boundary (TB) influences β-Mg17Al12 precipitation in Mg-9Al-1Zn alloy. The precipitates on the TBs are rodlike, while others are lath shape. Most precipitates hold the Burgers orientation relationship (OR) only with twin or matrix. Moreover, certain precipitate variants are absent and a new rule for variant selection on TB is proposed.

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This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. FRF-TP-17-003A1) and the National Natural Science Foundation of China (Grant No. 51771024). The magnesium alloy was kindly offered by Dr. Huang Xuefei, Sichuan University. Comments from Dr. Yu Zhiyang, Fuzhou University, are greatly appreciated.

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Authors and Affiliations

  1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Xin-Fu Gu, Man Wang, Zhang-Zhi Shi, Leng Chen & Ping Yang

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  1. Xin-Fu Gu
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  2. Man Wang
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  3. Zhang-Zhi Shi
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Correspondence to Xin-Fu Gu.

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Manuscript submitted April 16, 2018.

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Gu, XF., Wang, M., Shi, ZZ. et al. Asymmetrical Precipitation on the {10-12} Twin Boundary in the Magnesium Alloy. Metall Mater Trans A 49, 4446–4451 (2018). https://doi.org/10.1007/s11661-018-4863-1

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