Influence of indenter tip geometry on elastic deformation during nanoindentation
- ORNL
- MTS Nanoinstruments Innovation Center, Oak Ridge
Nanoindentation with a Berkovich indenter is commonly used to investigate the mechanical behavior of small volumes of materials. To date, most investigators have made the simplifying assumption that the tip is spherical. In reality, indenter tips are much more complex. Here, we develop a new method to describe the tip shape using the experimentally determined area function of the indenter at small depths (0--100 nm). Our analysis accurately predicts the elastic load-displacement curve and allows the theoretical strength of a material to be determined from pop-in data. Application of our new method to single crystal Cr{sub 3}Si shows that the predicted theoretical strengths are within 12% of the ideal strength G/2{pi}, where G is the shear modulus.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Shared Research Equipment Collaborative Research Center
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1003089
- Journal Information:
- Physical Review Letters, Vol. 95, Issue 4; ISSN 0031--9007
- Country of Publication:
- United States
- Language:
- English
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