Keywords: anisotropy, dislocation nucleation, indentation curve, nanoindentation
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.
Journal: TechConnect Briefs
Volume: 3, Technical Proceedings of the 2004 NSTI Nanotechnology Conference and Trade Show, Volume 3
Published: March 7, 2004
Pages: 111 - 114
Industry sector: Advanced Materials & Manufacturing
Topic: Informatics, Modeling & Simulation
ISBN: 0-9728422-9-2