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Effect of temperature and strain rate on the mechanisms of indentation deformation of magnesium

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Abstract

Dual-stage, constant loading-rate followed by constant-load, pyramidal indentation experiments were performed to investigate the strain-rate (105-101/s) and temperature (295-573 K) dependence of pure magnesium. The estimated total activation energy, Q (0.69-1.01 eV), and apparent activation volume, V (17-28b3), indicate that plastic deformation is controlled by a dislocation cross-slip mechanism. The results from this work and previous studies confirm that, during pyramidal indentation of Mg, the operative deformation mechanism remains the same over a very wide strain-rate and temperature range.

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Acknowledgments

Authors wish to thank the Natural Science and Engineering Research Council (NSERC) for providing financial support for this work.

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Authors and Affiliations

  1. Mechanical & Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada

    M. Haghshenas

  2. Mechanical & Materials Engineering, the University of Western Ontario, London, ON, N6A 5B9, Canada

    V. Bhakhri & R. J. Klassen

  3. NOVA Chemical Corporation, Calgary, AB, T2P 5C6, Canada

    R. Oviasuyi

Authors
  1. M. Haghshenas
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  2. V. Bhakhri
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  3. R. Oviasuyi
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  4. R. J. Klassen
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Correspondence to V. Bhakhri.

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Haghshenas, M., Bhakhri, V., Oviasuyi, R. et al. Effect of temperature and strain rate on the mechanisms of indentation deformation of magnesium. MRS Communications 5, 513–518 (2015). https://doi.org/10.1557/mrc.2015.57

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  • DOI: https://doi.org/10.1557/mrc.2015.57

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