| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
|
| Presentation Title |
Nanoindentation Pop-in Analysis of Oxidized Ni-based Superalloys |
| Author(s) |
Malo Jullien, Damien Texier, Marc Legros |
| On-Site Speaker (Planned) |
Malo Jullien |
| Abstract Scope |
Ni-based superalloys are design for high temperature applications under oxidizing environment. Despite their chromina-forming abilities, they still develop internal oxidation at high and intermediate temperature. Both internal and external oxidation affect mechanical properties and make the material prone to crack initiation. Mechanical properties were probed in the oxidation affected volume thanks to large nanoindentation maps and local in situ nanoindentation experiments. Nanoindentation maps were correlated to EDX and EBSD analyses to indentify the chemical-mechanical dependence of oxidized versus virgin specimens. Oxidized grain boundaries exhibited higher hardness than non-oxidized ones and grains gore. Also the reduced modulus was found sensitive to the crystallographic orientation. Pop-in were identify on the load - indentation depth curves and related to slip activity using AFM and TEM observations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nanotechnology, Mechanical Properties |