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Element doping improving mechanical properties of β′ phase in Al–Mg–Si alloy

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Abstract

The effect of element doping on the mechanical properties of β′-Mg9Si5 phase in Al–Mg-Si alloys are investigated using density-functional calculations. The results reveal that Mg17Si10Ge exhibits the highest degree of stability, attributed to its lower formation enthalpies. Doping of Ge and Zn elements may lead to a reduction in the material's hardness. Conversely, the addition of Al and Zn elements can significantly enhance the toughness and ductility of Mg17Si10X. The electron orbits of Si atoms are the primary influencing factor. The strength-ductility of these materials can be finely tuned by altering the charge transfer around the doping atoms.

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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgments

The authors gratefully acknowledge the financial support of this study from the Fundamental Research Funds for the Central Universities (FRF-GF-20-25B). This work is also thankful for the Research Program of Beijing Municipal Education Commission (Nos. KM201910037001, KM201910037186).

Funding

Fundamental Research Funds for the Central Universities, FRF-GF-20-25B, Chuan-Hui Zhang, Beijing Municipal Education Commission, KM201910037001, Lianhong Ding, KM201910037186, Lianhong Ding

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Authors and Affiliations

  1. National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing, 102206, China

    Jin Wang, Mengmeng Duan & Chuan-Hui Zhang

  2. School of Information, Beijing Wuzi University, Beijing, 101149, China

    Lianhong Ding

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  1. Jin Wang
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  2. Lianhong Ding
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Wang, J., Ding, L., Duan, M. et al. Element doping improving mechanical properties of β′ phase in Al–Mg–Si alloy. MRS Communications 13, 1187–1195 (2023). https://doi.org/10.1557/s43579-023-00427-1

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