Abstract
To improve the plastic deformation performance of a 08AL carbon steel ultra-thin strip, a pulsed electric field was integrated into the plastic processing of the ultra-thin strip, and the effects of high-energy current on its deformation ability were investigated. Current-assisted tensile tests were employed, and the results clarified that the pulsed current could reduce the activation energy of faults and promoted dislocation slip within grains and at grain boundaries, leading to a decrease in the deformation resistance of the metal and an increase in its plastic properties. Under the current density of 2.0 A/mm2, the yield strength, tensile strength, and elongation of the rolled sample reached 425 MPa, 467 MPa, and 12.5%, respectively. During the rolling process, it was found that the pulsed current promoted the dynamic recrystallization of the ultra-thin strip, reduced its dislocation density and deformation resistance, and promoted the coordinated deformation of the metal.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Nos. 51974196, 52275361, and 52105390), Open Research Fund from National Key Laboratory of Metal Forming Technology and Heavy Equipment (S2308100.W01), Natural Science Foundation of Shanxi Province (No. 20210302124426), and Special Funds for the Central Government to Guide Local Science and Technology Development (No. YDZX20191400002149).
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Ren, Zk., Xu, Yn., Chen, Jz. et al. Mechanism of high-energy pulsed current-assisted rolling of 08AL carbon steel ultra-thin strip. J. Iron Steel Res. Int. 31, 416–427 (2024). https://doi.org/10.1007/s42243-023-01132-y
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DOI: https://doi.org/10.1007/s42243-023-01132-y