About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Material Responses Investigated Through Novel In-Situ Experiments and Modeling
|
| Presentation Title |
Assessing Special Character Boundary Evolution Under In Situ Thermomechanical Loading |
| Author(s) |
Manisha Tripathy, Oliver Johnson, Eric Homer, Gregory B Thompson |
| On-Site Speaker (Planned) |
Manisha Tripathy |
| Abstract Scope |
The movement of grain boundaries is a mechanism by which microstructures can accommodate loading, whether that be thermal and/or mechanical. The extent of this boundary motion is related to their character. In this work, we utilize in situ thermomechanical loading in an SEM at various temperatures spanning cryogenic to a few hundred degrees Celsius to evaluate how specific boundaries evolve. Using Transmission Kikuchi Diffraction, the character was quantified in a series of nanocrystalline nickel boundaries at various stages of temperature and loads. The work specifically links these experimental outcomes to a series of atomistic simulations and a non-Arrhenius model that predicts that Σ3, Σ7, and Σ9 characters exhibit anti-thermal characteristics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Copper / Nickel / Cobalt, Mechanical Properties |