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 |
Compositional Effect on Microstructure and Deformation Behavior of Metastable Refractory High-Entropy Alloys |
Author(s) |
Yunjong Jung, Kangjin Lee, Kanghyun Park, Chanho Lee, Gian Song |
On-Site Speaker (Planned) |
Yunjong Jung |
Abstract Scope |
Refractory high-entropy alloys (RHEAs) have recently gained attention for their unique properties, such as high strength and softening resistance at elevated temperatures. However, most reported RHEAs have limited application potential due to limited ductility. Tailoring the stability of the BCC phase has been highlighted as a way to improve both ductility and tensile strength by activating mechanical twinning or phase transformation during deformation. Despite these advances, there remains a lack of understanding regarding the elemental effects on metastable behavior.
In this study, compositional effect of BCC and HCP structured elements on microstructure, deformation behavior of metastable RHEAs was investigated. Adjusting Nb or Ta content in a Ti-Zr-Hf ternary alloy plays a crucial role in change in phase stability that could switch the microstructure and deformation mechanism. Additionally, modifying Zr or Hf content in TiZrHfNb alloy also affect the phase stability resulting transition of both microstructure and deformation behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Mechanical Properties, Phase Transformations |