|
iDEA: Drexel E-repository and Archives >
Drexel Academic Community >
College of Engineering >
Department of Mechanical Engineering and Mechanics >
Faculty Research and Publications (MEM) >
Determination of the effective zero point of contact for spherical nanoindentation
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1860/2749
|
| Title: | Determination of the effective zero point of contact for spherical nanoindentation |
| Authors: | Moseson, Alexander J.
Basu, Sandip
Barsoum, Michel W. |
| Issue Date: | Jan-2008 |
| Publisher: | Materials Research Society |
| Citation: | Journal of Materials Research, 23(1): pp. 204-209. |
| Abstract: | Accurate determination of the “zero point,” the first contact between an indenter tip
and sample surface, has to date remained elusive. In this article, we outline a relatively
simple, objective procedure by which an effective zero point can be determined
accurately and reproducibly using a nanoindenter equipped with a continuous stiffness
measurement option and a spherical tip. The method relies on applying a data shift,
which ensures that curves of stiffness versus contact radius are linear and go through
the origin. The method was applied to fused silica, sapphire single crystals, and
polycrystalline iron with various indenter sizes to a zero-point resolution of ≈2 nm.
Errors of even a few nanometers can drastically alter plots and calculations that use the
data, including curves of stress versus strain. |
| URI: | http://dx.doi.org/10.1557/JMR.2008.0012
http://hdl.handle.net/1860/2749 |
| Appears in Collections: | Faculty Research and Publications (MEM)
|
Items in iDEA are protected by copyright, with all rights reserved, unless otherwise indicated.
|
www.drexel.edu
