About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
|
| Presentation Title |
High yield strength and exceptional work hardening in hierarchical-structured high-entropy alloys |
| Author(s) |
Zengbao Jiao |
| On-Site Speaker (Planned) |
Zengbao Jiao |
| Abstract Scope |
Yield strength and work hardening are two critical mechanical properties of structural metallic materials. However, increasing yield strength through conventional strengthening mechanisms often restricts further dislocation multiplications and interactions, which significantly reduces work hardening and poses a challenge to achieving an optimal balance between these properties in material design. Here we report an innovative approach to simultaneously enhance both yield strength and work hardening in hierarchical-structured high-entropy alloys. The high yield strength primarily stems from nanoprecipitates and grain boundaries, while the exceptional work hardening mainly originates from hetero-interface-mediated twinning. The hetero-deformation results in dislocation pile-ups and strain gradients, which provides the high stress necessary to activate mechanical twinning, thereby substantially improving the work hardening and plastic deformation stability of the alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |