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Grain Refinement, Microstructure and Mechanical Properties Homogeneity of Mg-Gd-Y-Nd-Zr Alloy During Multidirectional Forging

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Abstract

Multidirectional forging (MDF) of Mg-Gd-Y-Nd-Zr alloy was performed under decreasing temperature condition. The grain refinement, microstructure and mechanical properties homogeneity of Mg-Gd-Y-Nd-Zr alloy during MDF process were investigated. The results show that the grain refinement mechanism of Mg-Gd-Y-Nd-Zr alloy during MDF process was dynamic recrystallization. The dynamic precipitations were observed after MDF process, which were mainly located at the grain boundaries and had a significant influence on the grain refinement, and the amount of dynamic precipitations increased as the MDF passes increase. The microstructure of the billet was not homogeneous due to the deformation and temperature inhomogeneity during MDF process. Optimization MDF process has been proposed, which benefited the microstructure homogeneity and reduced the amount of the dynamic precipitations. Based on the optimization MDF process, the elongation to fracture significantly increased.

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Acknowledgments

This work was supported by the Chong Qing science and technology talent training plan Grant no. cstc2014kjrc-qnrc50004 and the Chong Qing Natural Science Foundation under Grant no. cstc2013jcyjjq70001.

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Authors and Affiliations

  1. Southwest Technology and Engineering Research Institute, Chongqing, 400039, People’s Republic of China

    Xiangsheng Xia, Changpeng Wang & Yang Wu

  2. State Key Laboratory of Nonferrous Metals and Processes, GRIMAT Engineering Institute Co., Ltd., Beijing, 101407, People’s Republic of China

    Xiangsheng Xia, Kui Zhang & Minglong Ma

  3. Collaborative Innovation Center of Precision Forming Integrated Manufacturing Technology, Chongqing, 400039, People’s Republic of China

    Xiangsheng Xia & Yang Wu

  4. School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, People’s Republic of China

    Baoguo Yuan

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  1. Xiangsheng Xia
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Correspondence to Xiangsheng Xia.

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Xia, X., Wang, C., Wu, Y. et al. Grain Refinement, Microstructure and Mechanical Properties Homogeneity of Mg-Gd-Y-Nd-Zr Alloy During Multidirectional Forging. J. of Materi Eng and Perform 27, 5689–5699 (2018). https://doi.org/10.1007/s11665-018-3687-x

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  • DOI: https://doi.org/10.1007/s11665-018-3687-x

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