| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Solid-State Diffusion Bonding of Metals and Alloys
|
| Presentation Title |
Similar and Dissimilar Joining of Nitinol via Transient Liquid Phase Bonding |
| Author(s) |
Zhaoxi Cao, Samuel Price, Ian McCue |
| On-Site Speaker (Planned) |
Zhaoxi Cao |
| Abstract Scope |
Joining of shape memory/superelastic materials have gained increased attention in recent years. However, traditional joining methods are challenging to apply to these materials because they lead to the formation of brittle intermetallics, decreases in functional performance, and strength reductions. Here, transient liquid phase (TLP) bonding is being studied as a viable solution for similar and dissimilar joining. Interlayer foils ranging from hundreds of nanometers to tens of microns thick, with different compositions in the TiCu, NiTiNb, and NiTiZr systems, were designed via CALPHAD approaches to join NiTi with both NiTi and Titanium - systems known to form brittle phases during traditional fusion welding. Upon heating, the layers interdiffuse to form either a partial or complete low-melting transient liquid, filling the gap between the bonding surfaces and solidifying isothermally. The designed composition allows for phase control during bonding, while the thin interlayer thickness allows for short diffusion length scales. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Solidification, Thin Films and Interfaces |