The linear process is similar to the rotary friction welding process in that one component is rubbed against the other while applying a load to produce heat. It is a high-quality, homogenous process that creates a solid phase bond with parent metal properties.
However, the linear technique differs in several important ways:
(i) The moving component is made to oscillate laterally rather than being rotated
(ii) Friction occurs througout the surface so that weld times are quick whatever the component size
(iii) The lateral motion of the weld eliminates the need for a symmetrical part so the linear process can be used to join almost any shape from rings and blades to fans and square metal contactors.