抄録
The mechanical properties of phase controlled friction welded joints of both 6063 aluminum alloys square bar and grooved square bar, which were friction welded by using a numerical controlled brake type friction welding machine, were examined. The phase controlled friction welding was using a servo motor positioning with hydraulic brake system. The burr was not generation from comer, and the burr occurred from the side. The burr of rotational side deviated to reverse side of the rotational direction, and the burr of fixed side inclined towards rotational side. The tensile strength of both square bar joint and center of grooved bar joint showed about 80% that of base metal, but the tensile strength of corner of grooved bar joint showed about 67% that of base metal. The elongation of joints was increased with increasing of friction time, but the elongation of all joints were lower than that of the base metal.
