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Effect of extrusion ratio (λ) on dynamic recrystallization of AZ31 magnesium alloy bending products prepared by staggered extrusion (SE)

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Abstract

Traditional bending products are usually divided into two steps: extrusion and bending. Staggered extrusion (SE) as a new process was proposed to prepare Mg alloy bending products in this paper. By designing the structure at one end of the stem, the dual functions of extrusion process and bending process can be realized in a single extrusion pass. The results of the present study show that by adjusting the degree of deformation of the AZ31 Mg alloy, a bending product with a specific curvature could be obtained by the SE process, and the microstructure of the bending product was refined. When the extrusion ratio was increased from 11.11 to 44.44, the grain size was refined from 23.89 to 9.69 μm, and the percentage of recrystallized structures increased from 61.1 to 78.8%.

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Funding

This work was supported by the National Natural Science Foundation of China (51975166) and the Fundamental Research Foundation for Universities of Heilongjiang Province (LGYC2018JQ011) and the Natural Science Foundation of Heilongjiang Province (LH2019E056).

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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

    Yan Peng Wang, Feng Li & Xue Wen Li

  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. Yan Peng Wang
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  2. Feng Li
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  3. Xue Wen Li
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Correspondence to Feng Li.

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Wang, Y.P., Li, F. & Li, X.W. Effect of extrusion ratio (λ) on dynamic recrystallization of AZ31 magnesium alloy bending products prepared by staggered extrusion (SE). Int J Adv Manuf Technol 108, 289–297 (2020). https://doi.org/10.1007/s00170-020-05416-5

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  • DOI: https://doi.org/10.1007/s00170-020-05416-5

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