Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1502230 | Scripta Materialia | 2008 | 4 Pages |
Abstract
Pop-in during nanoindentation, which indicates the onset of dislocation plasticity, was systematically investigated in annealed and pre-strained single crystals of nickel using spherical indenters with different tip radii. As the indenter radius and pre-strain decrease, the maximum shear stresses determined from the pop-in loads increase. This represents a new type of indentation size effect (ISE), based not on the measured hardness as in conventional ISE, but on the stress needed to initiate dislocation plasticity.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
S. Shim, H. Bei, E.P. George, G.M. Pharr,