Sonic? welding mild steel to aluminum plate

[Lochmoy]

There is a company somewhere that uses an israli designed process to sonicly and/or pressure-vibrate un-weldable materials together such as mild steel to aluminum. I have a sample sitting on my desk. Does anyone know if anyone is selling the equipment? What will it weld? Can you buy pre-welded bar stock to use at joints between steel and aluminum plates to weld to?

 

[unclesyd]

Here are two companies that you might checkout. No the ultrasonic process, but it is sonic.

The connectors.

http://www.highenergymetals.com/ground_straps.htm

Plate and bar.

http://www.dynamicmaterials.com/clad/cladmetalsref.htm

There is another process of coextrusion of al and steel but my references are no good anymore.

 

[swall]

Steel to aluminum can also be done with friction welding, if your pieces exhibit rotational symmetry. My previous employer was making propshafts by friction welding a 6061 aluminum tube to a steel flange.