| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Heterostructured and Gradient Materials (HGM VI): Principle, Processing and Properties
|
| Presentation Title |
Fatigue Behavior of Core–Shell Heterogeneous Grain Structured CoCrFeMnNi High-Entropy Alloy |
| Author(s) |
Zhe Zhang, Xu Chen, Kei Ameyama |
| On-Site Speaker (Planned) |
Zhe Zhang |
| Abstract Scope |
Heterogeneous grain structured high-entropy alloys (HEAs) exhibit excellent strength-ductility synergy due to the peculiar grain structure topology. However, the understanding of cyclic response and deformation mechanism under fatigue loading is still inadequate. Therefore, the low-cycle fatigue behavior and fatigue crack growth behavior of CoCrFeMnNi HEAs with a three-dimensional core–shell grain structure were investigated. The effects of core–shell network structure on cyclic response, fatigue life as well as fatigue crack growth rate are revealed. The dislocations activity dominantly appears in the soft core regions prior to the hard shell region. The LCF resistance remains when the strain amplitude is below 0.5%. Moreover, the network core–shell structure generates the crack deflection, enhancing roughness-induced crack closure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Other |