About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Microstructure-Sensitive Design and Advanced Characterization: An MPMD/SMD Symposium Honoring David T. Fullwood
|
| Presentation Title |
Simulations of Grain boundary-dislocation interactions |
| Author(s) |
David E Page, David T Fullwood, Robert H Wagoner, Eric R. Homer |
| On-Site Speaker (Planned) |
Eric R. Homer |
| Abstract Scope |
This work examines grain boundary (GB)-dislocation interactions as part of a collaboration with David Fullwood and Robert Wagoner. These interactions underpin the well-known Hall-Petch relationship, which still lacks understanding of how each individual GB-dislocation interaction contributes to the overall material response. The conditions for each GB-dislocation interactions can be so complex and unique. This presentation examines conditions for dislocation nucleation as well as interactions with incident dislocations. In the dislocation nucleation simulations, we observe a Mohr-Coulomb-like “yield” criteria. With the incident dislocations, the transmission slip system is readily predicted by the transmissivity factor. However, predicting whether the incident dislocation will transmit, be absorbed, or reflected remains a challenge. Even in simulations designed for transmission, the majority of dislocations are absorbed. These results are discussed in the context of the literature and the impact it could have on how we may wish to consider GB-dislocation interactions in general. |
| Proceedings Inclusion? |
Planned: |