About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Electronic Packaging and Interconnection Materials IV
|
| Presentation Title |
Multi-Layer Energy Transfer and Interfacial Heterogeneity in Ultrasonically Welded Ni/Al Lamellar Structures for EV Battery Tab Applications |
| Author(s) |
Yan-Lin Zhu, Kuan-Chieh Hu, Jhong-Ren Huang, Jhe-Yu Lin |
| On-Site Speaker (Planned) |
Yan-Lin Zhu |
| Abstract Scope |
This talk investigates energy transmission heterogeneity in ultrasonically welded five-layer Ni/Al/Ni/Al/Ni structures for electric vehicle battery applications. Progressive energy attenuation from the horn to the anvil creates a pronounced interfacial gradient. That is, upper interfaces achieve peak T-peel strength (~720 N) at 2500 J, while lower interfaces remain under-bonded due to insufficient energy delivery. This gradient microstructure manifests as a systematic decrease in IMC thickness (about 200 nm to 100 nm) and distinct dynamic recrystallization (DRX) behavior. Continuous and discontinuous DRX behaviors dominated among the Al foil, while retarded grain growth occurred at the lower layers. Zener–Hollomon analysis quantifies how differential strain rates and thermal histories govern layer-dependent microstructural evolution, providing mechanistic guidelines for scaling multilayer USW toward industrial battery tab joining. |
| Proceedings Inclusion? |
Planned: TMS Journal: Journal of Electronic Materials |
| Keywords |
Joining, Electronic Materials, Thin Films and Interfaces |