| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Grain Boundary Deformation and Damage |
| Author(s) |
Veronica Anghel, Ramon Matthew Martinez, James Anthony Valdez |
| On-Site Speaker (Planned) |
Veronica Anghel |
| Abstract Scope |
Damage nucleation in polycrystals occurs in locations of large strain concentrations, or microstructurally, in regions where heterogeneous deformation occurs. Experiments commonly show that cracks and voids tend to develop preferentially in some boundaries but less in others, indicating the significance of heterogeneity in local deformation. Grain boundaries are known to be a critical microstructural component controlling material’s mechanical properties, and their misorientation and crystallographic boundary planes can also influence the dislocation dynamics. Small scale tensile experiments performed on a mini tensile stage in aluminum and tantalum are used to investigate deformation around grain boundaries in columnar-grained metals. In-situ EBSD and DIC measurements looking at active deformation mechanisms and damage nucleation around grain boundaries are employed for detailed analysis of deformation evolution and damage nucleation. Results present influence of grain boundary types, grain boundary orientation with respect to loading, and evolution of dislocation densities around the grain boundaries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, |