About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Phase Transformations and Microstructural Evolution
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Presentation Title |
Stability and Microstructure of Pseudobinary (NiCu)(TiHfZr) Multicomponent High-Temperature Shape Memory Alloys |
Author(s) |
Cem Cakirhan, Daniel Salas, Kadri Can Atli, Ibrahim Karaman |
On-Site Speaker (Planned) |
Cem Cakirhan |
Abstract Scope |
There has been an increasing interest in high-temperature shape memory alloys (SMAs) due to their capacity to operate at higher temperatures than traditional NiTi SMAs, enabling potential applications in aerospace, automotive, manufacturing, and energy exploration industries. Recently, novel NiTi-based quaternary and quinary SMAs are being developed, seeking to enhance high-temperature stability and mechanical properties. In this study, the effects of chemical composition and thermal processing conditions on microstructure and martensitic transformation properties of Ni50-xCuxTi16.67Hf16.67Zr16.67 multi-component SMAs were investigated systematically. These alloys were demonstrated to undergo reversible B2-B19′ martensitic transformation with a martensite start temperature spanning from 100°C to 600°C. A new precipitate phase with a hexagonal MgZn2-type Laves phase structure was discovered to form in these alloys, contributing to a complex microstructure that notably affects the martensitic transformation properties and its reversibility. |
Proceedings Inclusion? |
Planned: |