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Study on Cavity Evolution of AZ80 Magnesium Alloy During Rotary Extrusion

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Abstract

As a new type of plastic-forming technology, rotary extrusion has the advantages of increasing the hydrostatic stress inside the deformed body and obtaining severe plastic deformation, which creates favorable mechanical conditions for repairing cavity defects. In this article, Deform-3D finite element software is used to establish the finite element model of cavity closure during rotary extrusion and analyze the cavity closure process. The influence of extrusion speed and rotation speed on the evolution of spherical cavity defects was studied, and the critical condition of cavity closure in magnesium alloy during rotary extrusion was obtained. Based on Z-C model and numerical simulation, the adaptability of the model under different parameters was analyzed, and a spherical cavity evolution model suitable for AZ80 magnesium alloy rotary extrusion was constructed to predict the change of cavity closure volume. The physical experiment of cavity closure in rotary extrusion was carried out on a Gleeble-3500 thermal simulator, which verified the accuracy of the numerical simulation and cavity evolution model and provided theoretical guidance for improving the performance of rotary extrusion products and related research.

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Acknowledgements

This research was financially supported by the Shanxi Scholarship Council of China (2021-127).

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Authors and Affiliations

  1. School of Materials Science and Engineering, North University of China, Taiyuan, 030051, China

    Xubin Li, Qiang Wang, Qingling Fang & Zhimin Zhang

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  1. Xubin Li
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  2. Qiang Wang
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  3. Qingling Fang
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  4. Zhimin Zhang
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Correspondence to Xubin Li.

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Li, X., Wang, Q., Fang, Q. et al. Study on Cavity Evolution of AZ80 Magnesium Alloy During Rotary Extrusion. JOM 75, 470–477 (2023). https://doi.org/10.1007/s11837-022-05583-8

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  • DOI: https://doi.org/10.1007/s11837-022-05583-8

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