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Electromagnetic impacting medium forming (EIMF): a new method forming process for magnesium alloy sheet

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Abstract

A new forming process for magnesium alloy sheet, namely, electromagnetic impacting medium forming (EIMF), is proposed. Medium is compressed by strong magnetic force which is produced from varied magnetic field between coil and driver sheet. Magnesium alloy sheet can be deformed by a strong force from medium. In EIMF, once impacting or more times impacting is easily implemented, that is difficulty in conventional electromagnetic forming. Effects of different discharge energy and temperature were investigated. Peak forming heights increased linearly with increasing discharge energy and temperature. Distribution of contour and thickness had been revealed. Strains could be improved by increasing temperature and discharge energy. Twice impacting process was carried out. The forming height was enhanced obviously in contrast with results obtained at once impacting. Fracture morphology and optical microstructure were analyzed. It is found that brittle fracture at room temperature and ductile fracture at 200 °C appeared. Due to high strain rate forming process, deformation mechanism (non-basal slip systems) has limit effect. And at 200 °C, twinning is also a main mechanism for AZ31 sheet deformation in EIMF. In further work, EIMF for formability of AZ31 sheet will be improved by affected the deformation mechanism.

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Acknowledgments

Thank you very much for State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University in the help of experimental conditions.

Funding

This work was supported by National Natural Science Foundation of China (No.51965050), Province Natural Science Foundation of Hunan (No.2018JJ2398), the State Key Laboratory of Material Processing and Die & Mould Technology (No. P2018-019), and the State Key Laboratory of Solidification Processing in NWPU (No. SKLSP201856).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China

    Junrui Xu, Yuyang Wang, Yi Li & Liangming Yan

  2. School of Mechanical Engineering, Xiangtan University, Xiangtan, 411105, China

    Junrui Xu & Zhisheng Wen

  3. State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China

    Junrui Xu

  4. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China

    Junrui Xu

  5. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China

    Junjia Cui

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  1. Junrui Xu
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Correspondence to Junrui Xu.

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Xu, J., Wang, Y., Wen, Z. et al. Electromagnetic impacting medium forming (EIMF): a new method forming process for magnesium alloy sheet. Int J Adv Manuf Technol 109, 553–563 (2020). https://doi.org/10.1007/s00170-020-05660-9

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  • DOI: https://doi.org/10.1007/s00170-020-05660-9

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