Microstructure and Mechanical Behavior Associated to Linear Friction Welding Manufacturing Process

Linear Friction welding (LFW) is a solid state welding technique where the welding surfaces are under linear reciprocating motion and axial compressive forces to heat them up for joining. Currently the manufacturing of several components such as bladed discs for aircraft engines is by machining them from forged material leading to a considerably large loss of material. LFW offers the opportunity to fabricate these components by reducing the material loss . However, the knowledge around the process, microstructural evolution and mechanical behavior is still limited in the literature. In this research effort, dog-bone specimens, square cross section beams and specially designed cantilevers are used to evaluate hardness, tensile and fatigue properties for the specific microstructures resulted due to LFW in welded Ti-6Al-4V.