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Twinning in copper deformed at high strain rates

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Abstract

Copper samples having varying microstructures were deformed at high strain rates using a split–Hopkinson pressure bar. Transmission electron microscopy results show deformation twins present in samples that were both annealed and strained, whereas samples that were annealed and left unstrained, as well as samples that were unannealed and strained, are devoid of these twins. These deformation twins occurred at deformation conditions less extreme than previously predicted.

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Acknowledgements

The electron microscope images in this study were obtained at the Centre for confocal and electron microscopy at the University of the Free State as well as at the Department of Physics at the Nelson Mandela Metropolitan University. The assistance of the staff is gratefully acknowledged. The authors gratefully acknowledge the provision of samples and the financial assistance of Dr Jean Terblanche and Denel Land Systems Western Cape. The financial assistance of the National Research Foundation of South Africa in the form of a travel grant is also gratefully acknowledged.

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Authors and Affiliations

  1. Department of Physics, University of Free State, Bloemfontein, South Africa

    S CRONJE, R E Kroon & W D ROOS

  2. Department of Physics, Nelson Mandela Metropolitan University, Port Elizabeth, Port Elizabeth

    J H NEETHLING

Authors
  1. S CRONJE
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  2. R E Kroon
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  3. W D ROOS
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  4. J H NEETHLING
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Correspondence to S CRONJE.

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CRONJE, S., Kroon, R.E., ROOS, W.D. et al. Twinning in copper deformed at high strain rates. Bull Mater Sci 36, 157–162 (2013). https://doi.org/10.1007/s12034-013-0445-4

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  • DOI: https://doi.org/10.1007/s12034-013-0445-4

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