About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
In Tribute to Robert Wagoner: A Pioneer in Metal Forming and Constitutive Modeling
|
| Presentation Title |
Dislocation/Grain Boundary Interactions Investigated by In Situ High Resolution Electron Backscatter Diffraction and Multiscale Modeling: Influence of Geometric Parameters |
| Author(s) |
Josh Kacher, Yang Su, Liming Xiong, Thanh Phan |
| On-Site Speaker (Planned) |
Josh Kacher |
| Abstract Scope |
Dislocation/grain boundary interactions are central to dictating the strength, ductility, strain localization, and failure modes of metals and alloys under a wide range of loading conditions. While geometric factors such as slip alignment has been shown to affect the likelihood of slip transmission across a boundary, their influence on the localized stress state is not as clear. In this study, we combine in situ loading of Ni samples in the scanning electron microscope with high resolution electron backscatter diffraction analysis to measure the evolution of the stress fields associated with dislocation/grain boundary interactions as a function of applied load. A wide variety of grain boundaries, including coherent and incoherent twin boundaries, were investigated, with a subset of boundaries investigated in greater detail using concurrent atomistic continuum simulations. Results will be discussed in terms of the effects of geometric compatibility and localized atomic structures on the stress field magnitude and evolution. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Thin Films and Interfaces, Computational Materials Science & Engineering |