Research Article

Forming Quality and Fatigue Behavior of Self-Piercing Riveted Joints of DP590 and AA6061 Plates

Figure 8

Fracture surface of the lower plate for group DA32 No. 5: (a) macroscopic morphology of fatigue fracture; (b) 1#regional microstructure; (c) 2#regional microstructure; (d) regional microstructure in figure (c); (e) 3#regional microstructure [25].