About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
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Presentation Title |
Nanoindentation: From the 1-D Original to 2 Dimensions |
Author(s) |
John Pethica |
On-Site Speaker (Planned) |
John Pethica |
Abstract Scope |
The talk will first describe the historical background and development of understanding of elastic relaxation of indents, why it became significant in the early 80s, and also its role in the creation of other techniques, especially AFM.
The main part of the talk will present recent results on simultaneous normal and lateral indentation. The combination is important for basic understanding of friction and tribology when any plasticity is involved. We show the following: Static friction can be understood from the lateral deformation mechanism that follows initial plastic indentation, and depends on sink-in. The further development of lateral sliding and the limiting of junction growth is controlled and determined by interface friction and tip geometry, with good agreement with classical models. At sufficiently small normal loads and smooth tips, the purely interface sliding and largely wear-free friction seen in AFM and SFA can be observed.
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Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Thin Films and Interfaces, Surface Modification and Coatings |