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Correlation between the Deformation of Nanostructured Materials and the Model of Dislocation Accommodated Boundary Sliding

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Abstract

Very recently, a new model for deformation in nanocrystalline (nc) materials has been formulated. The development of the model was based on the concept that plasticity in nc materials is the result of grain boundary sliding accommodated by the generation and motion of dislocations under local stresses. By analyzing experimental data on two nc-materials, Ni and Cu, it is demonstrated that this model can account for the deformation behavior of both metals over wide ranges of temperature, grain size, and strain rate.

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Notes

  1. A large-scale application of Molecular Dynamics and finite simulation modeling has shown[2] that the occurrence of boundary sliding leads to redistributing applied stresses and that this distribution can produce local stresses several times higher than applied stresses.

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This work was supported by the National Science Foundation under Grant No. DMR-0702978. Thanks are due to my former graduate students, Drs. Indranil Roy and Manish Chauhan, for their assistance.

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  1. Department of Chemical Engineering and Materials Science, University of California, Irvine, CA, 92697-2575, USA

    Farghalli A. Mohamed (Professor)

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  1. Farghalli A. Mohamed
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Correspondence to Farghalli A. Mohamed.

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Manuscript submitted April 12, 2007.

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Mohamed, F. Correlation between the Deformation of Nanostructured Materials and the Model of Dislocation Accommodated Boundary Sliding . Metall Mater Trans A 39, 470–472 (2008). https://doi.org/10.1007/s11661-007-9416-y

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