About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Chemistry and Physics of Interfaces
|
| Presentation Title |
Grain boundary-stress fundamental zones: a systematic exploration of orientation-dependent material response |
| Author(s) |
Fernando Daniel Leon Cazares, Coleman Alleman, Andrew Polonsky |
| On-Site Speaker (Planned) |
Fernando Daniel Leon Cazares |
| Abstract Scope |
The strain incompatibilities that develop at grain boundaries upon deforming a material influence its mechanical response. Yet, for any given stress state, exploring the entire configuration space remains impractical (8 degrees of freedom). Taking advantage of grain boundary and stress tensor symmetries, the current work demonstrates that for every bicrystal and stress state, there exists a fundamental zone that uniquely captures all possible stress orientations. The derivation of these regions facilitates the statistical analysis of grain boundary performance, and offers new and intuitive plotting capabilities. Together with an elastic bicrystal stress incompatibility model, a series of case studies reveals insights into the role of elastic anisotropy on damage distribution, invalidates prior assumptions related to slip localization near twin boundaries, and showcases a new way to optimize the orientation of textured polycrystals. The results of this work improve our fundamental understanding of crystalline interfaces and facilitate the study of material degradation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Mechanical Properties, Other |