About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXVI
|
| Presentation Title |
Interlayer-driven interfacial phase transformations during ultrasonic welding of titanium |
| Author(s) |
Zehao Li, Yi-Shun Peng, Kuan-Chieh Hu, Jhe-Yu Linb |
| On-Site Speaker (Planned) |
Zehao Li |
| Abstract Scope |
Welding titanium (Ti) alloys remains challenging because the limited high-strain-rate deformability of α-Ti promotes interfacial cracking and wear-particle fragmentation. Ultrasonic welding (USW), a promising energy-saving bonding technique, offers an ultrafast thermomechanical platform for activating localized solute diffusion and non-equilibrium interfacial phase transformations. Building on recent demonstrations that interlayer-induced β-Ti can convert brittle Ti/Ti interfaces into strong heterogeneous α/β/α joints, this talk discusses how β-stabilizing solutes govern interfacial transformation pathways, microstructure, and joint performance. Fe, V, and Mo are selected as representative interlayers with distinct intrinsic diffusivities and β-stabilizing potencies in β-Ti. By correlating welding parameters, phase constitution, and joint strength, we quantify how these interlayers affect the formation of retained β, α′ martensite, Widmanstätten α, and ω phase during rapid cooling. These results reveal the competition between diffusion-assisted β stabilization and subsequent non-equilibrium transformations, establishing an interlayer design strategy for producing strong Ti joint interfaces. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Joining, Phase Transformations |