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 |
Creep-resistant Refractory High-entropy Alloy NbTaTiV for High-temperature Applications |
Author(s) |
Huamiao Wang, Chuhao Liu |
On-Site Speaker (Planned) |
Huamiao Wang |
Abstract Scope |
A newly-developed refractory high-entropy alloy (RHEA), NbTaTiV, has received extensive attention due to its potential in high-temperature applications. In addition to its good room-temperature ductility over 30 % and high-temperature strength at the level of 595 MPa, the alloy exhibits top high-temperature creep resistance. To explore the underneath mechanisms, this study applies the combination of in-situ neutron diffraction (ND) technique and crystal plasticity modeling. Specifically, the high-temperature mechanical behaviors of the NbTaTiV RHEA have been investigated. Counter intuitively, even though at high temperature, severe lattice distortion of the RHEA still plays a substantial role for its excellent properties. Our results show that the grain components with different orientations have weak anisotropy. These features allow NbTaTiV to break through the limitations of the rapid strength decay of traditional superalloys above 800 ℃ and make NbTaTiV RHEA a good candidate in various applications at elevated temperatures. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, High-Temperature Materials, Other |