About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithm Development in Materials Science and Engineering
|
Presentation Title |
Development of Interatomic Potential to Study Elementary Dislocation Properties in High Entropy Alloys: The FeNiCrMn Model Alloy |
Author(s) |
Ayobami Daniel Daramola, Giovanni Bonny, Gilles Adjanor, Christophe Domain, Ghiath Monnet, Anna Fraczkiewicz |
On-Site Speaker (Planned) |
Ayobami Daniel Daramola |
Abstract Scope |
An interatomic potential for CrFeMnNi quaternary alloys focusing on plasticity has been developed with the embedded atomic method (EAM) termed EAM-21. The newly developed interatomic potential was based on a tested previously developed potential of FeNiCr ternary alloys and pure Mn. The
potential parameters were determined by fitting to experimental, density functional theory and other existing EAM data, including elastic constants and stacking fault energy. Other properties of the potential include structural stability, the potential predict face-centered cubic (fcc) structure stability under shear strain at elevated temperature. The potential applicability was tested on 1⁄2[110] edge dislocation core structure for pure Ni, equiatomic alloy of CrFeMnNi and its subsystems at different temperature. The stable glide of edge dislocation and fcc phase stability at different temperature range was confirmed. This study demonstrates the suitability of EAM-21 potential for plasticity mechanism
and mechanical properties of CrFeMnNi system. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Computational Materials Science & Engineering, Modeling and Simulation |