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In situ mechanical observations during nanoindentation inside a high-resolution scanning electron microscope

Published online by Cambridge University Press:  31 January 2011

K.A. Rzepiejewska-Malyska*
Affiliation:
Swiss Federal Laboratories for Material Testing and Research—EMPA, CH-3602 Thun, Switzerland
G. Buerki
Affiliation:
Swiss Federal Laboratories for Material Testing and Research—EMPA, CH-3602 Thun, Switzerland
J. Michler
Affiliation:
Swiss Federal Laboratories for Material Testing and Research—EMPA, CH-3602 Thun, Switzerland
R.C. Major
Affiliation:
Hysitron, Inc., Minneapolis, Minnesota 55344
E. Cyrankowski
Affiliation:
Hysitron, Inc., Minneapolis, Minnesota 55344
S.A.S. Asif
Affiliation:
Hysitron, Inc., Minneapolis, Minnesota 55344
O.L. Warren
Affiliation:
Hysitron, Inc., Minneapolis, Minnesota 55344
*
a)Address all correspondence to this author. e-mail: karolina.rzepiejewska@empa.ch
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Abstract

In nanoindentation, the occurrence of cracks, pileup, sink-in, or film delamination adds additional complexity to the analysis of the load–displacement curves. Many techniques and analysis methods have been used to extract both qualitative and quantitative information from the indentation test both during and after the test. Much of this information is obtained indirectly or may even be overlooked by current testing methods (e.g., cracks that open only during the loading cycle of the test may go unnoticed from a typical residual indentation analysis). Here we report on the development of a miniature depth-sensing nanoindentation instrument and its integration into a high-resolution scanning electron microscope. Real-time observation of the nanoindentation test via scanning electron microscopy allows for visualization and detection of certain events such as crack initiation, pileup, or sink-in, and other material deformation phenomena. Initial results from aluminum 〈100〉 and a thin gold film (∼225 nm) are presented.

Type
Articles
Copyright
Copyright © Materials Research Society 2008

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References

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