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On the Microstructure and Mechanical Properties of Mg-Gd Alloy with Combined Zn and Ca Addition

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Abstract

The effects of combined addition of Zn and Ca to Mg-1Gd alloy (Mg-1Gd-1.5Zn-1Ca wt.%) on its microstructure and mechanical properties were studied. The results showed that the fine and coarse Mg2Ca and Ca2Mg6Zn3 phase particles were formed in the matrix by the combined additions of Zn and Ca. A drastic refinement of dynamic recrystallized grains was observed in the extruded Mg-1Gd-1.5Zn-1Ca alloy sheet. A remarkable yield strength enhancement and minor ductility decrement have been observed, where strength remarkably increases from 73 to 153 MPa along ED and from 119 to 182 MPa along TD and the ductility decreases from 25.1 to 18.8% along ED and from 13.6 to 9.8% along TD. The SEM and TEM analysis showed that the formed high-density fine Mg2Ca and Ca2Mg6Zn3 particles and the co-segregations of Ca and Zn in grain boundaries led to the fine structure and the strength enhancement.

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Acknowledgements

The authors are grateful for the Hunan Provincial Natural Science Foundation of China (Grant no. 2022JJ40025), the Scientific Research Fund of Hunan Provincial Education Department (Grant no. 21B0726, 21B0712, 21C0653), the National Natural Science Foundation of China (U2037601, U1910213, 51971044 and 52001037), the Natural Science Foundation of Chongqing (Project No. cstc2019jcyj-msxmX0234), and the Chongqing Science and Technology Commission (cstc2019yszx-jcyjX0004).

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Hunan City University, Yiyang, 413002, China

    Jun Zhao, Yang Liu, Baijun **ao, **a He & Ganxin Chen

  2. National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

    Bin Jiang, Yuan Yuan, Ming Yuan & Fusheng Pan

  3. Institute of New Materials, Guangdong Academy of Sciences, Guangzhou, 510650, China

    Jun Xu

  4. School of Chemistry and Materials Science, Hubei Engineering University, **aogan, 432000, China

    Ming Yuan

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Zhao, J., Liu, Y., Jiang, B. et al. On the Microstructure and Mechanical Properties of Mg-Gd Alloy with Combined Zn and Ca Addition. J. of Materi Eng and Perform 32, 7363–7371 (2023). https://doi.org/10.1007/s11665-022-07643-1

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