| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Structures and Modeling
|
| Presentation Title |
Unprecedented Supercritical Elasticity in NiCoFeGa Multi-principal-element Alloys |
| Author(s) |
Haiyang Chen, Yan-Dong Wang, Yang Ren |
| On-Site Speaker (Planned) |
Yang Ren |
| Abstract Scope |
We recently discovered a new type elasticity: supercritical elasticity (SCE), in NiCoFeGa multi-principal-element alloys [Chen et al., Nature Materials, (2020). https://doi.org/10.1038/s41563-020-0645-4]. In this talk, we will show that by tuning the element concentrations to nearly equal fractions, the alloys exhibit a large elasticity up to 15.2% strain, with non-hysteretic mechanical responses, a small temperature dependence and high-energy-storage capability and cyclic stability over a wide temperature and composition range. We found that the SCE is ultimately related to a novel microstructure consisting of atomic-level entanglement of ordered and disordered crystal structures, which can be manipulated to tune the SCE. We will discuss the impact of this work on the future exploitation of elastic strain engineering and development of related functional materials for a wide variety of high-performance engineering applications, ranging from deep-space and deep-sea exploration to intelligent robotics. |
| Proceedings Inclusion? |
Planned: TMS Journal: Metallurgical and Materials Transactions |