Nanotech 2004 Vol. 3
Nanotech 2004 Vol. 3
Technical Proceedings of the 2004 NSTI Nanotechnology Conference and Trade Show, Volume 3

Atomic and Mesoscale Modelling of Nanoscale Phenomena Chapter 3

Orientation E®ects of Elastic-Plastic Deformation at Surfaces: Nanoindentation of Nickel Single Crystals

Authors: O. Kum

Affilation: Clemson University, United States

Pages: 111 - 114

Keywords: nanoindentation, anisotropy, indentation curve, dislocation nucleation

Orientation effects in nanomechanical properties at the surfaces with molecular dyanmics were observed as a function of indenter size and indenter speed in three crystal orientations: 100, 110, and 111. The force vs displacement curves for indentation follows the Hertzian solution for elastic deformation of F = kd^1.5. However, the force fitted constant k showed a dependency on indenter size, velocity, and crystal orientations. The results of dislocation nucleations in different orientations also showed anisotropy: Stacking faults in the 100 deep partial dislocations in the 110 shallow partial dislocations followed by the stacking faults in the 111.

ISBN: 0-9728422-9-2
Pages: 561
Hardcopy: $79.95