| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Atomistic Calculations of the Peierls Stress in Nb-Based Multi-principal Element Alloys |
| Author(s) |
Shuozhi Xu, Emily Hwang, Jun Xu, Yanqing Su, Irene J. Beyerlein |
| On-Site Speaker (Planned) |
Shuozhi Xu |
| Abstract Scope |
The Peierls stress is the minimum resolved shear stress required to translate a dislocation in a crystal. In an otherwise perfect crystal, the Peierls stress is closely related to the critical resolved shear stress. Thus, Peierls stress is usually considered one of the most important factors controlling plastic deformation of metals. Compared with pure metals, the Peierls stress in metallic alloys is less explored. In this work, we study the Peierls stress in one type of metallic alloys, the multi-principal element alloys (MPEAs), which received significant attention in recent years. Using atomistic simulations, we calculate the Peierls stresses on different slip planes in Nb-based MPEAs. Pure Nb is also studied as a reference. Our calculations reveal a significant spatial variation of the Peierls stress as a result of the local chemical composition fluctuations in MPEAs. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |