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Microstructure Evolution and Mechanical Properties of AQ80 Alloy During Forward Extrusion and Twist Deformation

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Abstract

A new severe plastic deformation technique, forward extrusion and twist deformation, was adopted to manufacture magnesium (Mg) alloys at different temperatures. The microstructure evolution and mechanical properties of extruded AQ80 alloy were investigated. The strain distribution in FETD extrusion was simulated with finite element simulation software. The extruded samples exhibit finer grain sizes, weaker basal textures, higher recrystallized volume fractions and higher strengths than the traditional forward extrusion samples. This technology can refine the microstructure and improve the mechanical properties of Mg alloys. At lower temperatures, the grain size is smaller with a finer second phase, which is detected as Mg17AL12. Mg17AL12 has a particle-stimulated nucleation effect and a retarding effect on grain growth, resulting in much finer DRXed grains. Due to the effects of fine-grained strengthening and second phase strengthening, the strength and elongation of AQ80 alloy can be improved significantly.

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Acknowledgments

This work was partly supported by National Natural Science Foundation of China (Grant Nos. 51975207, 51728202), Hunan Provincial Natural Science Foundation for Excellent Young Scholars of China (Grant No. 2019JJ30010) and the Scientific Research Fund of the Hunan Provincial Education Department (Grant No. 17B089).

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Authors and Affiliations

  1. Hunan Provincial Key Laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, People’s Republic of China

    Xiaoye Liu & Liwei Lu

  2. College of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, People’s Republic of China

    Liwei Lu, Min Ma, Wei Kang & Bo Che

  3. Hunan Provincial Overseas-Wisdom Innovation Center of New Energy Vehicles in Industrial-Academic-Research Cooperation, Hunan University of Science and Technology, Xiangtan, 411201, Hunan, People’s Republic of China

    Liwei Lu, Min Ma, Wei Kang & Bo Che

  4. School of Material Science and Engineering, North University of China, Taiyuan, 030051, Shanxi, People’s Republic of China

    Yong Xue

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  1. Xiaoye Liu
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Correspondence to Liwei Lu, Min Ma or Yong Xue.

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Liu, X., Lu, L., Ma, M. et al. Microstructure Evolution and Mechanical Properties of AQ80 Alloy During Forward Extrusion and Twist Deformation. J. of Materi Eng and Perform 29, 6774–6783 (2020). https://doi.org/10.1007/s11665-020-05104-1

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  • DOI: https://doi.org/10.1007/s11665-020-05104-1

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