Do grain boundaries in nanophase metals slide?

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Nanophase metallic materials show a maximum in strength as grain size decreases to the nano scale, indicating a break down of the Hall-Petch relation. Grain boundary sliding, as a possible accommodation mechanisms, is often the picture that explain computer simulations results and real experiments. In a recent paper, Bringa et al. Science 309, 1838 (2005), we report on the observation of an ultra-hard behavior in nanophase Cu under shock loading, explained in terms of a reduction of grain boundary sliding under the influence of the shock pressure. In this work we perform a detailed study of the effects of hydrostatic ... continued below

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Bringa, E M; Leveugle, E & Caro, A October 27, 2006.

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Nanophase metallic materials show a maximum in strength as grain size decreases to the nano scale, indicating a break down of the Hall-Petch relation. Grain boundary sliding, as a possible accommodation mechanisms, is often the picture that explain computer simulations results and real experiments. In a recent paper, Bringa et al. Science 309, 1838 (2005), we report on the observation of an ultra-hard behavior in nanophase Cu under shock loading, explained in terms of a reduction of grain boundary sliding under the influence of the shock pressure. In this work we perform a detailed study of the effects of hydrostatic pressure on nanophase Cu plasticity and find that it can be understood in terms of pressure dependent grain boundary sliding controlled by a Mohr-Coulomb law.

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10 p. (0.2 MB)

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PDF-file: 10 pages; size: 0.2 Mbytes

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  • Journal Name: Applied Physics Letters, vol. 89, no. 23, December 4, 2006, pp. 023101; Journal Volume: 89; Journal Issue: 23

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  • Report No.: UCRL-JRNL-225797
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 936969
  • Archival Resource Key: ark:/67531/metadc899654

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  • October 27, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • April 13, 2017, 3:05 p.m.

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Bringa, E M; Leveugle, E & Caro, A. Do grain boundaries in nanophase metals slide?, article, October 27, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc899654/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.