| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Effect of Aging Treatment on Microstructure and Superelastic Properties of a High Zr-containing Ti–Zr–Nb–Sn Shape Memory Alloy |
| Author(s) |
Shuanglei Li, Yeon-Wook Kim, Jung Gi Kim, Tae-Hyun Nam |
| On-Site Speaker (Planned) |
Shuanglei Li |
| Abstract Scope |
In this study, microstructure and superelastic properties of a Ti-40Zr-8Nb-2Sn (at.%) shape memory alloy were studied by transmission electron microscope and in-situ X-ray diffraction. Nanodomains and fine nano-scaled isothermal ω phases were formed in the alloy aged at 573 K for 1 h. The stress-induced β - α" martensitic transformation occurred in spite of the presence of nanodomains. The aged alloy exhibited excellent superelasticity with a large total recovery strain (7.1%), high ductility (11.6%) and high yield stress (578 Mpa), indicating that a good balance of functional and mechanical properties was achieved in the aged alloy when compared with other 573 K/1 h aged β-type Ti alloys showing low yield stress and/or poor ductility. The enhanced yield strength without significant loss of ductility in the aged Ti-40Zr-8Nb-2Sn is ascribed to the restriction of the isothermal ω growth due to the high Zr content and Sn addition. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Biomaterials, |