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Preparation Mechanism of Fine-Grained Magnesium Alloys by Accumulative Alternating Back Extrusion

  • Emerging Mechanisms for Enhanced Plasticity in Magnesium
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Abstract

Fine grain modification is an important means for preparing lightweight and low-plasticity materials, including magnesium alloys. This paper proposes an accumulative alternating back extrusion (AABE) technique for preparing magnesium alloy materials. Metallographic microscopy and electron backscatter diffraction were used to test the resulting magnesium alloy samples and indicated that AABE can effectively refine microstructure and improve uniformity in local areas of the sample. After one pass of AABE, the upper part of the specimen was mainly characterized by recrystallization, with a high degree of refinement. The lower part showed coexisting recrystallization refinement and twinning refinement, which are less preferable. The mean grain size after applying five passes of AABE was half that of the samples subjected to only one pass. AABE is a novel and effective method for preparing high-performance magnesium alloy materials.

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Acknowledgements

This project is supported by the National Natural Science Foundation of China (Grant No. 51975166) and the Fundamental Research Foundation for Universities of Heilongjiang Province (No. LGYC2018JQ011).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, 150040, People’s Republic of China

    Ye Wang, Feng Li, Xue Wen Li & Wen Bin Fang

  2. Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, People’s Republic of China

    Feng Li

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  1. Ye Wang
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  2. Feng Li
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  3. Xue Wen Li
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  4. Wen Bin Fang
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Correspondence to Feng Li.

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Wang, Y., Li, F., Li, X.W. et al. Preparation Mechanism of Fine-Grained Magnesium Alloys by Accumulative Alternating Back Extrusion. JOM 72, 2578–2585 (2020). https://doi.org/10.1007/s11837-020-04109-4

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  • DOI: https://doi.org/10.1007/s11837-020-04109-4

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