| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Computational Thermodynamics and Kinetics
|
| Presentation Title |
Temperature-dependent Kinetic Pathways for Jog-pair Nucleation in FCC Metals |
| Author(s) |
Anas Abu-Odeh, Maeva Cottura, Mark Asta |
| On-Site Speaker (Planned) |
Anas Abu-Odeh |
| Abstract Scope |
The dislocation climb efficiency of a metal under a specific environment can dictate how it responds under creep, annealing, and irradiation conditions. Here we present energetics from classical atomistic simulations of jog-pair structures using molecular statics, simulated annealing, and the nudged-elastic band (NEB) method as inputs to a climb efficiency model for Al and Cu. Given the low stacking fault energy (SFE) of Cu, there exists a variety of kinetic pathways for jog-pair formation which can vary its climb efficiency. Our method presents possible pathways for a jog-pair spanning one climb plane, but can be extended to an arbitrary number of climb planes as well as the inclusion of stress. These generally neglected considerations are crucial for the development of predictive mesoscale models of dislocation climb of low-SFE metals. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |