About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Design and Processing Optimization for Advanced Manufacturing: From Fundamentals to Application
|
Presentation Title |
Design of Cold-workable Refractory Complex Concentrated Alloys for Applications at Ambient-to-elevated Temperatures |
Author(s) |
Cheng Zhang, Enrique J. Lavernia |
On-Site Speaker (Planned) |
Enrique J. Lavernia |
Abstract Scope |
Refractory complex concentrated alloys (RCCAs) with ultrahigh melting points are considered as promising candidates for high-temperature structural application. However, poor ductility and negligible formability at ambient temperature are two critical properties that limit their use in many applications. To address these challenges, we employed CALPHAD to design a new class of RCCAs that can be severely cold-worked from the as-cast state without fracture. Such cold-worked RCCAs can be made homogeneous at lower annealing temperatures for shorter times, and microstructures in the current RCCAs can be tailored to achieve desired mechanical properties. Our MD simulation work demonstrates the mechanism that contributes to the easy-processability. In addition, the current RCCAs exhibit tensile strength-ductility synergy at ambient-to-elevated temperatures. Related strengthening and deformation mechanisms will be discussed. Our study proposed a feasible strategy to design and fabricate RCCAs with easy-processability. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, High-Entropy Alloys, Modeling and Simulation |