| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
D-33: Sustainable NiTi Shape Memory Metallurgy |
| Author(s) |
Sakia Noorzayee, Jan Frenzel, Gunther Eggeler |
| On-Site Speaker (Planned) |
Sakia Noorzayee |
| Abstract Scope |
Transitioning from a linear to a circular economy is gaining significance due to high resource demand and significant greenhouse gas emissions. This need for sustainable approaches extends beyond key metals like steel, aluminum, and copper to NiTi shape memory alloys (SMAs). Producing Nickel and Titanium is energy-intensive (Ni: 0.25 EJ/yr; Ti: 0.07 EJ/yr) and results in considerable CO2 emissions (Ni: 26 MT/yr; Ti: 6.7 MT/yr). Manufacturing processes for NiTi products, such as stents, cause substantial material waste. Our research focuses on the sustainability of NiTi SMAs, which are sensitive to impurities affecting their properties. We investigate recycling possibilities through a theoretical model that assesses how factors like geometry, surface state, and processing conditions influence the purity and phase transformation of recycled SMAs. We combine these findings with laboratory results using various surface preparation approaches for impurity management and arc re-melting. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Recycling and Secondary Recovery, Other |