Abstract
In this study, crack propagation tests were conducted to clarify property for the fatigue crack propagation of friction stir welded 2024-T3 aluminum alloy. The welding line of the specimens inclined 0 and 30 degree to direction of applied stress. Results showed that crack propagation rate was accelerated by the tensile residual stress around the welding line. After the crack tip run thought the welding line, the crack propagation rate was accelerated by tensile stress that was caused by the residual stress redistribution during crack propagation. The crack grew perpendicular to the loading direction regardless of the angle of the welding line. And crack propagation rate was not affected by the angel of FSW joint.
