About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Understand the Influence of Precipitates on the Fatigue Performance of Ni50.3Ti29.7Hf20 High Temperature Shape Memory Alloys Through In Situ Heating |
Author(s) |
Jiaqi Dong, Alexander Demblon, Ibrahim Karaman, Kelvin Xie |
On-Site Speaker (Planned) |
Jiaqi Dong |
Abstract Scope |
NiTiHf is a promising class of high-temperature shape memory alloy (SMA) that finds applications in various fields. How precipitates enhance fatigue performance in SMAs is not well understood. In this work, we used thermally cycled Ni50.3Ti29.7Hf20 as the model system, and applied in situ heating and advanced TEM-based characterization to directly observe the interaction of precipitates and transformation-induced dislocations. The observations elucidate the roles of precipitate in the transformation and fatigue properties in the samples. This work constitutes an important step towards understanding the microstructure-fatigue performance relationship in NiTiHf SMAs. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, High-Temperature Materials, Phase Transformations |