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Evaluation of the Athermal Effect of Electric Pulsing on the Recovery Behavior of Magnesium Alloy

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Abstract

It is still unclear whether the effects of the electric current on the mechanical behavior can be attributed exclusively to Joule heating. To evaluate athermal effect of electropulsing on recovery, we compared mechanical behavior, dislocation density, and hardness of a pre-tensioned magnesium alloy after treatment of electric pulses (EP) and annealing in an oil bath. The analysis reveals that the athermal effect of EP on the recovery is not clearly identified under a given set of conditions in this study, although EP treatment appears more efficient than conventional heat treatment. This is further supported by the in situ transmission electron microscopy results that little dislocation rearrangement was observed even during the high current density of 4000 A/mm2 as long as temperature remains low.

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Acknowledgment

This study was financially supported by the Fundamental Research Program of the Korea Institute of Materials Science (KIMS).

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Authors and Affiliations

  1. Korea Institute of Material Science, 66 Sangnam-dong, Changwon-si, Gyeongnam, 641-831, Republic of Korea

    Se-Jong Kim (Senior Researcher), Sung-Dae Kim (Senior Researcher), Donghoon Yoo (Researcher), Jinwoo Lee (Senior Researcher), Youngmok Rhyim (Principal Researcher) & Daeyong Kim (Principal Researcher)

  2. Korea University of Science and Technology, 217 Gajeongro, Daejeon, 305-350, Republic of Korea

    Daeyong Kim (Principal Researcher)

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  1. Se-Jong Kim
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  2. Sung-Dae Kim
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  3. Donghoon Yoo
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  4. Jinwoo Lee
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  5. Youngmok Rhyim
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Correspondence to Sung-Dae Kim or Daeyong Kim.

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Manuscript submitted June 20, 2016.

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Kim, SJ., Kim, SD., Yoo, D. et al. Evaluation of the Athermal Effect of Electric Pulsing on the Recovery Behavior of Magnesium Alloy. Metall Mater Trans A 47, 6368–6373 (2016). https://doi.org/10.1007/s11661-016-3804-0

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  • DOI: https://doi.org/10.1007/s11661-016-3804-0

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