Can you weld aluminium to copper?

Yes, it is possible to join aluminium and copper parts even though these materials have different physical characteristics.
Welding aluminium with copper allows, among other things, to limit the electrical resistivity of the latter. FSW is therefore used in cold plates and bus bars for electrical applications.
Friction stir welding (FSW) allows a metallurgical bond between dissimilar materials. This technology, which is both environmentally friendly and innovative, has made aluminium in particular possible.