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Anisotropy evolution of wide magnesium alloy foils during continuous electroplastic rolling

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Abstract

Anisotropy or brittleness poses an obstacle to the rolling of wide magnesium alloy foils, particularly those with a thickness of 1.0 mm. To address this problem, a special electroplastic rolling (EPR) process was developed to provide a better method than traditional isothermal heat treatment. Actual measured results showed that the pulse current with high energy could rapidly adjust high brittleness and severe anisotropy. This condition was helpful in the plasticity and rollability of wide magnesium alloy foils during continuous EPR process. Finally, a 0.13 mm-thick magnesium alloy foil was successfully rolled through continuous EPR processes without any intermediate annealing or reheating in the furnace. Evidently, the developed method contributed to the best matching conditions between the pulse current and deformation parameters along different directions. Therefore, EPR is a promising technology for changing the anisotropy or brittleness of wide magnesium alloy foils online.

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Abbreviations

T sta :

Steady-state temperature

je :

Equivalent current density

σ NC :

Stress with the pulse current

σ PC :

Isothermal stress without the pulse current

σ sp :

Flow stress with the pulse current

ε :

Strain

\(\dot{\varepsilon}\) :

Strain rate

T :

Deformation temperature

j p :

Peak current density

σ 00 :

Initial yield strength

B :

Material hardening coefficient

N :

Hardening index

C :

Coefficient of strain rate

ε p :

Equivalent plastic strain

\(\dot{\tilde{\varepsilon}}\) :

Dimensionless plastic strain rate

σ sT :

Isothermal yield strength

σ sJ :

Yield strength with electric pulse

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Acknowledgments

This work is supported by Returned Overseas Scholar Foundation of Hebei Province (Grant No. C20210321) and the Natural Science Foundation of Hebei Province (Grant No. E2021203106).

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Authors and Affiliations

  1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao, Hebei, 066004, China

    Lipo Yang, Hailong Zhang & Gengliang Liu

  2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Hebei, 066004, China

    Lipo Yang

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  1. Lipo Yang
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Corresponding author

Correspondence to Lipo Yang.

Additional information

Lipo Yang is a Professor at the National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Hebei Province, China. His research interests include special rolling processes, strip shape control, and new mill designs.

Hailong Zhang is a master’s student at the National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Hebei Province, China. His research interests include the electroplastic rolling of magnesium alloy foil.

Gengliang Liu is a Ph.D. student at the National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Hebei Province, China. His research interests include special rolling processes of magnesium alloy foil.

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Yang, L., Zhang, H. & Liu, G. Anisotropy evolution of wide magnesium alloy foils during continuous electroplastic rolling. J Mech Sci Technol 37, 1747–1759 (2023). https://doi.org/10.1007/s12206-023-0315-y

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  • DOI: https://doi.org/10.1007/s12206-023-0315-y

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