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Deformation defects in nanocrystalline nickel

  • NanoMay 2006
  • Published:
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Abstract

Defects induced by plastic deformation in electrodeposited, fully dense nanocrystalline (nc) Ni with an average grain size of 25 nm have been characterized by means of high resolution transmission electron microscopy. The nc Ni was deformed under uniaxial tension at liquid-nitrogen temperature. Trapped full dislocations were observed in the grain interior and near the grain boundaries. In particular, these dislocations preferred to exist in the form of dipoles. Deformation twinning was confirmed in nc grains and the most proficient mechanism is the heterogeneous nucleation via emission of partial dislocations from the grain boundaries.

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Acknowledgements

XLW was supported by Natural Science Foundation of China (50471086, 50571110, 10472117), 973 Project of China (2004CB619305), Key Project of CAS.

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Authors and Affiliations

  1. State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100080, P.R. China

    Xiaolei Wu

  2. Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA

    En Ma

  3. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA

    Y. T. Zhu

Authors
  1. Xiaolei Wu
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  2. En Ma
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  3. Y. T. Zhu
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Correspondence to Xiaolei Wu.

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Wu, X., Ma, E. & Zhu, Y.T. Deformation defects in nanocrystalline nickel. J Mater Sci 42, 1427–1432 (2007). https://doi.org/10.1007/s10853-006-1229-7

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  • DOI: https://doi.org/10.1007/s10853-006-1229-7

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