RADIANT ENERGY WELDING PROCESSES
In radiant energy welding processes, heat is produced at the point of welding when a stream of electrons or a beam of electro-magnetic radiations strikes on the workpiece. This welding can be carried out in vacuum or at low pressures. Electron beam welding (EBW) and laser welding are two main types of radiant energy welding processes.
Source A Textbook of Basic Manufacturing Processes and Workshop Technology by Rajender Singh.