Dudesom, you might have some success with ultrasonic welding. I think you're going to have difficulty getting the metal to adhere, though.
Check out thermosonic welding. It's the process used to bond wires to ICs. Ultrasonic welding is also used to bond plastic cases together.
Check out thermosonic welding. It's the process used to bond wires to ICs. Ultrasonic welding is also used to bond plastic cases together.