| About this Abstract |
| Meeting |
3rd World Congress on High Entropy Alloys (HEA 2023)
|
| Symposium
|
HEA 2023
|
| Presentation Title |
Dislocations in Complex Alloys:
Insights from Peierls-Nabarro Modeling
|
| Author(s) |
Terrence Moran, Bastien Aymon, William A. Curtin |
| On-Site Speaker (Planned) |
William A. Curtin |
| Abstract Scope |
Dislocations in alloys with random solute distributions, short-range order, or clustering have a range of competing length and energy scales that overall establish energy barriers to dislocation motion. The flow behavior then depends on many different underlying material parameters and it becomes difficult to formulate theories that include all these factors. Here, to guide development of theories, we show how a Peierls-Nabarro/Phase-Field (PN/PF) model can enable efficient and accurate parametric exploration of dislocation behavior as a function of controllable material parameters. Key often-overlooked elements of the PN/PF model are discussed. First applications of the PN//PF model to (i) understanding dislocation line tension in both fcc and bcc metals and (ii) the emergence of characteristic dislocation length scales in random alloys, are then presented and discussed in the context of current theories. |
| Proceedings Inclusion? |
Planned: Metallurgical and Materials Transactions |