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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Advances in Multi-Principal Element Alloys V: Mechanical Behavior
Presentation Title Dislocation Properties in Refractory Compositionally Complex Alloys
Author(s) Haixuan Xu
On-Site Speaker (Planned) Haixuan Xu
Abstract Scope Refractory compositionally complex alloys (RCCAs) exhibit exceptional yield strength at elevated temperatures and have the potential to outperform conventional superalloys. However, the underlying mechanisms governing their deformation behavior remain insufficiently understood. In this study, we employ atomistic simulations to investigate the fundamental properties of edge and screw dislocations in representative RCCAs. Key attributes, including thermodynamic stability, Peierls stress, and Peierls barriers, are systematically analyzed. Additionally, we explore dislocation nucleation mechanisms in polycrystalline systems across a range of temperatures. This work provides atomistic insights into the dislocation behavior of RCCAs, laying the groundwork for their further development and optimization for high-temperature structural applications.
Proceedings Inclusion? Planned:
Keywords High-Entropy Alloys, Modeling and Simulation, Mechanical Properties

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