About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
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Presentation Title |
D-7: Dynamic Mechanical Performance of FeNiCoAl-based High-entropy Alloy: Enhancement via Microbands and Martensitic Transformation |
Author(s) |
Aomin Huang |
On-Site Speaker (Planned) |
Aomin Huang |
Abstract Scope |
Multi-principal elements alloys with more than five components, namely high-entropy alloys (HEAs) have been extensively studied due to their excellent mechanical properties as promising structural materials. As novel metallic alloys, excellent performances such as high strength at both cryogenic and high-temperature conditions, and great resistance toward classic strength-ductility trade-off, have been found in recent studies. However, most emphasis has been placed to study their mechanical properties subjected to low strain-rate which leads to insufficient understanding of their properties at high strain-rate. In our study, varying strain rates of compression tests are performed on a split-Hopkinson pressure bar (SHPB) system to establish their microstructure evolution and deformation mechanisms. We report on a new strategy to improve the dynamic mechanical properties of coarse-grained HEAs by introducing microbands as a bridge to initiate stress-induced martensitic transformation (SIMT). This alloy exhibited yield stress over 1.2 GPa with good deformability under high strain-rate loading.
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Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, |