About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fracture and Deformation Across Length Scales: Celebrating the Legacy of William Gerberich
|
| Presentation Title |
New "Eyes and Ears" on the Origins of Friction from Two-Axis Nanoindentation |
| Author(s) |
George M. Pharr |
| On-Site Speaker (Planned) |
George M. Pharr |
| Abstract Scope |
Among Bill Gerberich's great contributions to our understanding of the mechanical behavior of solids is his seminal work on the development of nanoindentation and related testing techniques that probe mechanical properties at very small scales. In this study, a new two-axis nanoindentation system was used to examine the mechanics of deformation of micron-scale asperity contacts in sliding interfaces that control fundamental processes in friction. The testing system consists of two independent nanoindentation actuators oriented transverse to each other so that the forces and displacements of each can be independently controlled and monitored. To simulate the behavior of sliding asperities in hard materials, a spherical diamond indenter with a radius of ~2 μm was slid over a flat plate of fused silica under various combinations of normal and transverse loading. Results are discussed in terms of prevailing ideas on the mechanisms that control friction in single asperity contacts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Other, Other, |