| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
|
Heterostructured and Gradient Materials (HGM VI): Principle, Processing and Properties
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| Presentation Title |
Strengthening of Refractory High-Entropy Alloy Over a Broad Temperature Range via the Formation of Heterostructures
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| Author(s) |
Aomin Huang, Enrique J Lavernia, Calvin H Belcher |
| On-Site Speaker (Planned) |
Aomin Huang |
| Abstract Scope |
The novel refractory high-entropy alloy (RHEA) NbTaTiHf, noted for its excellent cold workability, demonstrates significantly enhanced mechanical properties over a broad temperature range when subjected to appropriate annealing treatment. This enhancement arises from the formation of heterostructures due to partial recrystallization. The contrast in grain sizes between the recrystallized and non-recrystallized zones creates a composite structure of soft and hard domains. This heterostructure induces long-range back stress on the softer domains during external loading, a phenomenon known as heterogeneous deformation-induced (HDI) strengthening. This effect substantially boosts the strength of the softer regions. This study highlights a novel pathway for strengthening RHEAs, offering an alternative to the established mechanisms of solid solution strengthening, precipitation strengthening, and Hall-Petch hardening. This work will determine the working temperature range of HDI strengthening in RHEAs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nanotechnology, |