https://www.cloos.de/de-en/processes/details/cold-weld/
With the Cold Weld process an alternating current produces a very special pulse form, which brings about an extremely low heat input. Due to this type of heat-reduced kind of arc welding the welding process can be optimally controlled. The increased deposition rate can either be used for more filling volume or higher welding speed. The material is only subjected to minimum heat and the original material properties remain to a large extent unchanged.