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Structure, Mechanical Properties, and Applications of Nanocrystalline Materials

  • Mohammed CherkaouiEmail author
  • Laurent Capolungo
Chapter
Part of the Springer Series in Materials Science book series (SSMATERIALS, volume 112)

Nanocrystalline (NC) materials are composed of grain cores with well-defined atomic arrangement (e.g., face center cubic, body center cubic) joined by an interphase region composed of grain boundaries and higher-order junctions (e.g., triple junctions, quadruple junctions). Early experiments on nanocrystalline materials have shown that the interphase region and particularly grain boundaries exhibit an almost grain size–independent thickness [1]. Hence, as the grain size is decreased, the volume fraction of the interphase region increases. Supposing a tetracaidecahedral grain shape, corresponding to a realistic grain shape, the following expressions of the volume fraction of interphase (e.g., grain boundaries and triple junctions), grain boundaries, and triple junctions can be derived [2].

Keywords

Equal Channel Angular Pressing Strain Rate Sensitivity Triple Junction Nanocrystalline Material Excess Volume 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Georgia Institute of TechnologyAtlantaUSA
  2. 2.Los Alamos National LaboratoryLos AlamosUSA

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