Microstructures and Mechanical Properties of Friction Welded Ti–6Al–4V Alloy

We investigated the relationship between microstructure and mechanical properties of Ti–6Al–4V alloy subjected to friction welding (FW). In this work, specimens with a diameter 15 mm length 50 were prepared, FW was performed at constant rotation speed (1600 rpm) different upset lengths (1 3 mm). The electron backscattered diffraction (EBSD) method used analyze grain boundary characteristic distributions (GBCDs) such as size, misorientation angle, phase for weld zone base material. found that microstructures in developed by combination continuous dynamic recrystallization transformation. addition, decrease led accelerated refinement, average sizes refined from material (5.75 µm) 1.45 µm 1.85 1 mm, respectively. Consequently, maximum microhardness value increased ?20% an relative material, yield tensile strengths welded materials maintained same levels those Therefore, based on properties, application could be obtained joints superior performance.