| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Structures and Modeling
|
| Presentation Title |
Mobility of Dislocations in FeNiCrCoCu High Entropy Alloys via Molecular Dynamics Simulations |
| Author(s) |
Yixi Shen, Douglas Spearot |
| On-Site Speaker (Planned) |
Yixi Shen |
| Abstract Scope |
Dislocation core structure and mobility laws in FeNiCrCoCu high entropy alloys (HEAs) are studied using atomistic simulations and are compared with homogeneous Ni and Cu. Screw, 30°, 60° and edge straight dislocations are created using the Volterra displacement fields. Details associated with mobility laws in HEAs are found to be different from homogeneous metal systems. For example, the mobilities of screw and 60° dislocations are lower than edge and 30° dislocations in homogeneous Ni and Cu, whereas only the mobilities of 60° dislocations are lower than 30° dislocations in HEA systems. Significant waviness in the leading and trailing partial dislocation lines are observed in HEA systems, which are different from the straight partial dislocation lines observed in homogeneous Ni or Cu. This waviness is measured and is correlated with the ability of individual dislocations to glide under an applied shear stress in HEAs |
| Proceedings Inclusion? |
Planned: TMS Journal: Metallurgical and Materials Transactions |