Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
Email

 

You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: The edge effect in nanoindentation

Source: Philosophical Magazine, volume 91, issue 7-9, March 2011, pp. 1387-1399

Author(s)Jakes, Joseph; Stone, Donald

Publication Year: 2011  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4707-3A

Abstract: Until recently, obtaining unambiguous data from a nanoindentation measurement placed near a free edge has not been possible because the discontinuity associated with the edge introduces artifacts into the measurement. The primary consequence of a free edge is to introduce a structural compliance, Cs, into the measurement. Like the machine compliance, Cm, Cs is independent of the size of the indent and it adds to the measured unloading compliance; but unlike Cm, Cs is a function of position. Accounting for Cs in nanoindentation analyses removes the artifacts in nanoindentation measurements associated with the edge,allowing researchers to more accurately probe material properties near an edge. Expressions were obtained for the effect of the free edge on hardness and modulus measured using the Oliver-Pharr method. The theory was tested on specimens including fused silica, poly(methylmethacrylate), and alayered silicon-on-insulatorspecimen.

Keywords: Nanotechnology, nanostructured materials, measurement, deformations, hardness, mechanical properties, elasticity, modulus of elasticity, silicon, silica, polymethyl methacrylate, error analysis, equations, nanoindentation, surface properties, edge effects, discontinuity, Oliver-Pharr method, statistical analysis

Publication Review Process: Non-Refereed (Other)

File size: 434 kb(s)

Date posted: 05/16/2011
RITS Product ID: 36590
Current FPL Scientist associated with this product
Jakes, Joseph
Research Materials Engineer
  

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »


Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »


Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


Nanotechnology

A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »


Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »