About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
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Presentation Title |
Impact of Elemental Additions on Elastic and Plastic Behavior of Refractory Multi-Principal-Element Alloys |
Author(s) |
Rui Feng, George Kim, Dunji Yu, Yan Chen, Yongjie Hu, Wei Chen, Peter Liaw, Ke An |
On-Site Speaker (Planned) |
Rui Feng |
Abstract Scope |
Refractory high-entropy alloys (HEAs) or multi-principal-element alloys (MPEAs) have garnered considerable attention for their potential in extreme environment applications. However, their brittleness at room temperature (RT) presents a significant barrier to practical use. Here, we investigate the elastic and plastic behavior of equiatomic ternary NbTiV and MoNbV refractory MPEAs by incorporating Ti and Mo into the binary NbV alloy, which are the essential subsystems of various model refractory MPEAs. The elastic properties of these alloys are examined using in-situ neutron diffraction and first-principles calculations, highlighting the influence of additions of Ti and Mo on the elasticity. The plastic deformation behavior is understood by TEM characterization and neutron-diffraction profile analysis, showing the effect of elemental additions on dislocation slips and screw/edge characters. This research elucidates the origin of RT brittleness in the representative refractory MPEAs, providing valuable insights into designing ductile and strong refractory HEAs through a rational alloy-design strategy. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, Characterization |