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Modified Johnson-Cook model incorporated with electroplasticity for uniaxial tension under a pulsed electric current

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Abstract

An empirical expression describing the electroplastic deformation behavior is suggested based on the Johnson-Cook (JC) model by adding several functions to consider both thermal and athermal electric current effects. Tensile deformation behaviors are carried out for an AZ31 magnesium alloy and an Al-Mg-Si alloy under pulsed electric current at various current densities with a fixed duration of electric current. To describe the flow curves under electric current, a modified JC model is proposed to take the electric current effect into account. Phenomenological descriptions of the adopted parameters in the equation are made. The modified JC model suggested in the present study is capable of describing the tensile deformation behaviors under pulsed electric current reasonably well.

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Authors and Affiliations

  1. Liquid processing & Casting R&D Group, Korea Institute of Industrial Technology, Incheon, 21999, Republic of Korea

    Moon-Jo Kim

  2. Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea

    Hye-Jin Jeong, Ju-Won Park & Heung Nam Han

  3. School of Mechanical Engineering, University of Ulsan, Ulsan, 44610, Republic of Korea

    Sung-Tae Hong

Authors
  1. Moon-Jo Kim
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  2. Hye-Jin Jeong
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  3. Ju-Won Park
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  4. Sung-Tae Hong
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  5. Heung Nam Han
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Correspondence to Heung Nam Han.

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Kim, MJ., Jeong, HJ., Park, JW. et al. Modified Johnson-Cook model incorporated with electroplasticity for uniaxial tension under a pulsed electric current. Met. Mater. Int. 24, 42–50 (2018). https://doi.org/10.1007/s12540-017-7297-1

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  • DOI: https://doi.org/10.1007/s12540-017-7297-1

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