| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Heterostructured and Gradient Materials (HGM VI): Principle, Processing and Properties
|
| Presentation Title |
Strong and Ductile High-Entropy Alloys With Coherent Nanolamellar Structures |
| Author(s) |
Zengbao Jiao |
| On-Site Speaker (Planned) |
Zengbao Jiao |
| Abstract Scope |
Nano-lamellar materials containing high-density interfaces are of interest owing to their unusual interface-driven properties, such as high strengths. Unfortunately, these materials generally suffer from a severe limitation—lack of tensile ductility. In this talk, we report that high strength-ductility synergy can be achieved in coherent nano-lamellar high-entropy alloys. The strength originates mainly from the lamellar boundary strengthening, whereas the ductility correlates to a progressive work-hardening mechanism. Particularly, the coherent lamellar boundaries facilitate the dislocation transmission, which eliminates the stress concentrations at the boundaries. Deformation-induced hierarchical stacking-fault networks and associated Lomer-Cottrell locks enhance the work hardening capability, resulting in unusually large tensile ductilities. The coherent nano-lamellar strategy can potentially be applied to many other alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, |