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Effect of electric current density on the mechanical property of advanced high strength steels under quasi-static tensile loads

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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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Authors and Affiliations

  1. School of Mechanical Engineering, University of Ulsan, Ulsan, South Korea

    Min-Sung Kim, Nguyen Thai Vinh, Hyeong-Ho Yu & Sung-Tae Hong

  2. Innovative engineering team, MS-Autotech Company, Anyang, South Korea

    Hyun-Woo Lee

  3. Department of Materials Science & Engineering and Center for Iron & Steel Research, RIAM, Seoul National University, Seoul, South Korea

    Moon-Jo Kim & Heung Nam Han

  4. School of Engineering, Mechanical Engineering, Penn State Erie, The Behrend College, Erie, PA, USA

    John T. Roth

Authors
  1. Min-Sung Kim
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  2. Nguyen Thai Vinh
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  3. Hyeong-Ho Yu
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  4. Sung-Tae Hong
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  5. Hyun-Woo Lee
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  6. Moon-Jo Kim
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  7. Heung Nam Han
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  8. John T. Roth
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Correspondence to Sung-Tae Hong.

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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

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