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

Figure 7

Fracture surface of the rivet for group DA32 No. 5: (a) macroscopic morphology of fatigue fracture; (b) 1＃regional microstructure; (c) 2＃regional microstructure [25].

(a)

(b)

(c)