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High Temperature Nanoindentation for the Study of Flow Defects

Published online by Cambridge University Press:  01 February 2011

C. A. Schuh ,
J. K. Mason ,
A. C. Lund  and
A. M. Hodge
C. A. Schuh
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA
J. K. Mason
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA
A. C. Lund
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA
A. M. Hodge
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA
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Abstract

Our recent progress in elevated temperature nanoindentation is reviewed, with an emphasis on the study of discrete events (i.e., pop-in phenomena) observed during nanoindentation. For crystalline materials the incipient plasticity problem is associated with the nucleation of dislocations, an effect which we show to be significantly temperature dependent. For metallic glasses it is the operation of individual shear bands beneath the indenter that gives rise to pop-in events; here we also show this to be a temperature dependent phenomenon. Approaches to extract the activation volume and energy of defects involved in plastic flow beneath the indenter are also briefly described.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 841: Symposium R – Fundamentals of Nanoindentation and Nanotribology III , 2004 , R4.8
Copyright
Copyright © Materials Research Society 2005

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References

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