About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Multi-Principal Element Alloys II
|
Presentation Title |
Designing Immiscible Medium-entropy Alloys |
Author(s) |
Hyoung Seop Kim, Jongun Moon |
On-Site Speaker (Planned) |
Hyoung Seop Kim |
Abstract Scope |
A new strategy for designing heterogeneous high-entropy or medium-entropy alloys based on immiscible elements with light-weight and excellent mechanical properties is proposed. As an example, Alx(CuFeMn)100-x (x = 0, 7.5, and 15 at%) alloys were developed by utilizing the immiscible nature of Cu-Fe alloys. The microstructures of the alloys show phase separation into Cu-rich and Fe-rich regions, and the addition of Al transforms the crystal structure from dual face-centered cubic to face-centered cubic and body-centered cubic. Phase separation of the microstructure into two domains enables further dissolution of Al into the matrix. The alloys exhibit high strength because of solid solution strengthening and hetero-deformation induced strengthening caused by heterogeneous microstructures. The presence of nano-scale twins and essential partially recrystallized microstructures also enhances the strength of the alloys. This new type of medium-entropy alloys is expected to expand the design window in physical metallurgy. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, |