About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
30 Years of Nanoindentation with the Oliver-Pharr Method and Beyond
|
Presentation Title |
Factors Affecting Nanoindentation Derived Activation Parameters for PLC Effects |
Author(s) |
Henry Ovri, Erica Lilleodden |
On-Site Speaker (Planned) |
Henry Ovri |
Abstract Scope |
The relevant atomic species that dynamically age dislocations during deformation and consequently the underlying deformation mechanisms that govern Portevin-Le Chaterlier (PLC) effect are commonly accessed by estimating the associated activation enthalpy, ∆Ea. We recently developed a nanoindentation-based approach that is based on a more theoretically sound phenomelogical model than the conventional uniaxial test based methods. Unlike the latter, the model provides estimates of ∆Ea along with the associated activation volume and attempt frequency at only one temperature. In this talk, we will highlight the influence of strain rate, indentation depth, and indenter geometry on these parameters and discuss the implications of these variables on the utility of the technique for investigations of PLC. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Characterization, Mechanical Properties |