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A Comparative Study of the Nanocrystalline Material Produced by Sliding Wear and Inert Gas Condensation

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Abstract

A High Resolution Electron Microscopy (HREM) study of grain boundaries in nanocrystalline copper produced by sliding wear and by inert gas condensation is described. The results in both cases are essentially the same and similar to those in conventional polycrystals. Contrary to reports in the literature, these results do not indicate the presence of a fundamentally different structure in nanocrystalline materials. Measurements of the mechanical properties (such as yield strength, elastic modulus and strain rate sensitivity) of these materials using nanoindentation are also presented. These are found to be in good agreement with values expected from a polycrystalline material with a very fine grain size.

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Acknowledgments

The authors are grateful to Prof. R. Kirchheim for providing the nanocrystalline samples and for useful discussions. One of the authors (S. K. G.) would like to thank Dr. A. Sachdev for assistance with the HREM work and Dr. M. J. Mayo for assistance with the nanoindentation testing. This project was funded by the NSF Project # DMR - 8718834.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, 43210-1179, USA

    S. K. Ganapathi, M. Aindow, H. L. Fraser & D. A. Rigney

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  1. S. K. Ganapathi
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  2. M. Aindow
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  3. H. L. Fraser
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  4. D. A. Rigney
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Ganapathi, S.K., Aindow, M., Fraser, H.L. et al. A Comparative Study of the Nanocrystalline Material Produced by Sliding Wear and Inert Gas Condensation. MRS Online Proceedings Library 206, 593–598 (1990). https://doi.org/10.1557/PROC-206-593

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