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George M. Pharr answers a few questions about this month's
new hot paper in the field of Materials Science.
From
•>>September 2005
Field:
Materials Science
Article Title: Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology
Authors: Oliver, WC;Pharr, GM
Journal: J MATER RES
Volume: 19
Page: 3-20
Year: JAN 2004
* MTS Syst Corp, Oak Ridge, TN 37830 USA.
* MTS Syst Corp, Oak Ridge, TN 37830 USA.
* Univ Tennessee, Knoxville, TN 37996 USA.
* Oak Ridge Natl Lab, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
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 Why
do you think your paper is highly cited?
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“This paper reviews changes to a testing methodology we developed in the early 1990's and first published in 1992...”
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This paper reviews changes to a testing methodology we developed in
the early 1990s and first published in 1992 in an article entitled:
"An improved technique for determining hardness and
elastic-modulus using load and displacement sensing indentation
experiments" in the Journal of Materials Research 7 (6):
1564-1583, JUN 1992. The methodology has since become widely adopted;
in fact, the 1992 paper now has 2,282 citations. The new paper
addresses changes to the methodology we have made over the last
decade. Thus, the new paper is being highly cited largely because of
the general importance of the methodology.
Does
it describe a new discovery or a new methodology that's useful to
others?
It describes refinements to a methodology we developed about 15
years ago.
Could
you summarize the significance of your paper in layman's terms?
The testing methodology, now standardly called nanoindentation,
allows the strength and mechanical properties of materials to be
measured at very small scales. The techniques have aided in the
development of nanotechnology, specifically, when the strength of a
nanoscale material or device is important to its performance.
How
did you become involved in this research?
This research began in the mid-1980s when Warren Oliver and I
began collaborating on research ideas of mutual interest. It has
since become the main focus of my research program, and Warren
Oliver started a successful company that manufactures nanomechanical
testing systems. The company, now known as the MTS Nanoinstruments
Innovation Center in Oak Ridge, TN, was purchased a few years ago by
MTS Systems Corp.
George M. Pharr
Professor of Materials Science and Engineering
The University of Tennessee
Knoxville, TN, USA
and
Joint Faculty
Metals and Ceramics Division
Oak Ridge National Laboratory
Knoxville, TN, USA
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ESI Special Topics,
September 2005
Citing URL - http://www.esi-topics.com/nhp/2005/september-05-GeorgeMPharr.html
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