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Free surface effects on rotational deformation in nanocrystalline materials

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Abstract

Free surface effects on rotational deformation mediated by grain boundary dislocations in nanocrystalline materials are theoretically described. The critical stresses and characteristic geometric parameters for the rotational deformation occurring in nanocrystalline materials near their free surfaces are calculated and compared with those specifying the rotational deformation in bulk regions. The role of the free surface effects in the interpretation of electron microscopy data for plastically deformed nanocrystalline materials is discussed.

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Acknowledgements

This work was supported by the Russian Science Foundation (Research Project 14-29-00199).

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Authors and Affiliations

  1. Research Laboratory for Mechanics of New Nanomaterials, Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, 195251, Russia

    I. A. Ovid’ko & A. G. Sheinerman

  2. Department of Mathematics and Mechanics, St. Petersburg State University, Saint Petersburg, 198504, Russia

    I. A. Ovid’ko & A. G. Sheinerman

  3. Institute of Problems of Mechanical Engineering, Russian Academy of Sciences, Bolshoj 61, Vasilievskii Ostrov, Saint Petersburg, 199178, Russia

    I. A. Ovid’ko & A. G. Sheinerman

Authors
  1. I. A. Ovid’ko
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  2. A. G. Sheinerman
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Correspondence to A. G. Sheinerman.

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Ovid’ko, I.A., Sheinerman, A.G. Free surface effects on rotational deformation in nanocrystalline materials. J Mater Sci 51, 6444–6451 (2016). https://doi.org/10.1007/s10853-016-9942-3

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