Abstract
The effect of a single pulse of electric current on the mechanical property of advanced high strength steels (AHSS) under quasi-static tensile loads is investigated by experiments. During a typical quasi-static tensile test, electric current is applied to a specimen for a short duration (less than 1 second) while the specimen is in plastic region. The stress-strain curve shows that the flow stress almost instantly decreases significantly (stress-drop) when the electric current is applied, while the tensile strength from the following stress-strain curve after the short pulse of electric current is not changed much. The experimental result suggests that the stress-drop at the moment of a short pulse of electric current can be effectively used to reduce the springback of material, as successfully demonstrated in the present study.
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Kim, MS., Vinh, N.T., Yu, HH. et al. Effect of electric current density on the mechanical property of advanced high strength steels under quasi-static tensile loads. Int. J. Precis. Eng. Manuf. 15, 1207–1213 (2014). https://doi.org/10.1007/s12541-014-0458-y
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DOI: https://doi.org/10.1007/s12541-014-0458-y