Fatigue crack propagation behavior of friction stir welded 5083-H32 Al alloy

Fatigue crack propagation (FCP) behavior of friction stir welded (FSWed) 5083-H32 Al alloy was examined with the fatigue crack growing either along the dynamically recrystallized zone (DXZ) at variable Delta K or perpendicular to the DXZ at a constant Delta K value of 10, 13, 15, and 17 MP root m, respectively. The FCP behavior of FSWed 5083-H32 specimen is substantially influenced by the presence of FSW zone, the trend of which is discussed based on residual stress measurement and fractographic observation.