| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Stacking Fault Energy in Metastable Alloys |
| Author(s) |
Mulaine Shih, Maryam Ghazisaeidi |
| On-Site Speaker (Planned) |
Mulaine Shih |
| Abstract Scope |
In this work, we examine the stacking fault energy (SFE) in concentrated alloys to gain insight about the deformation mechanisms. The goal of this work is to understand the fundamental meaning of SFE in concentrated alloys, which not only have a range of SFE values, but also varies from positive to negative in recent computation predictions. We choose NiCo alloy as our model system to perform atomistic simulations. We study the concept of average versus “local” SFE and examine the distribution and the temperature-dependence of SFE. We also interrogate the dislocation behaviors in positive, zero and negative average SFE alloys, and analyze the force balance on the dislocations. The results explain the discrepancy between experimental measurements and computation predictions of SFE in medium and high entropy alloys. |
| Proceedings Inclusion? |
Planned: |