| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
|
| Presentation Title |
Superior High-Temperature Strength in a Supersaturated Refractory High-Entropy Alloy |
| Author(s) |
Lia Amalia, Rui Feng, Bojun Feng, Michael C. Gao, Chuan Zhang, Joerg C. Neuefeind, Jonathan D. Poplawsky, Yang Ren, Ke An, Michael Widom, Peter Liaw |
| On-Site Speaker (Planned) |
Peter Liaw |
| Abstract Scope |
Refractory high-entropy alloys have shown to be promising for high-temperature applications. However, heat softening is a challenging issue for materials for high-temperature applications, especially for temperatures above 1,173K. By manipulating the intrinsic characteristics of the material, we designed CrMoNbV with a single-phase body-centered cubic (bcc) structure with a strength beyond 1,000 MPa at 1273K. Neutron scattering, transmission electron microscopy, and first-principles calculations were employed to study the origin of the high-temperature strength. It was revealed that a large mismatch of atomic size and elastic modulus, insensitivity of elastic constants to temperature, and edge-dislocation dominance caused solute pinning, making a pronounced solid-solution strengthening. This study paves the way to design materials with high-temperature strength. |
| Proceedings Inclusion? |
Planned: |