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Process model and experimental analysis of circumferential extending extrusion forming for magnesium alloy sheet

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Abstract

In order to further enrich the existing manufacturing methods and approaches of magnesium alloy sheet forming, a new process of circumferential extending extrusion forming of magnesium alloy sheet, which focuses on the process principle and characteristics of the method, is proposed in this paper. Through theoretical analysis, technological theoretical models such as the dimension relationship between the original billet and the formed sheet and the extrusion speed were deduced. The circumferential extending extrusion process of AZ31 magnesium alloy sheets was experimented. The results show that the backpressure ring of pure aluminum can change the stress state of the sheet during extending extrusion and effectively restrain the change of sheet thinning trend and cracking defects at the outer edge caused by tensile stress, and the product quality is improved remarkably. According to the actual requirements, the size of the required sheets can be customized. It can be seen from the comparison that as the distance from the axis increases, the average grain size of the product decreases remarkably, and and the degree of recrystallization is higher. Meanwhile, the microstructure is refined. With the maturity of the process, it is expected to provide a new idea for the short-process forming of high-performance lightweight alloy sheets.

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Funding

This project is supported by the National Natural Science Foundation of China (No. 51675143) and State Key Lab of Advanced Welding and Joining, Harbin Institute of Technology (AWJ-19M01). The authors would like to take this opportunity to express their sincere appreciation.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, 150040, China

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

  2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China

    Feng Li

Authors
  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. Process model and experimental analysis of circumferential extending extrusion forming for magnesium alloy sheet. Int J Adv Manuf Technol 102, 1547–1556 (2019). https://doi.org/10.1007/s00170-018-03232-6

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  • DOI: https://doi.org/10.1007/s00170-018-03232-6

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