[Retracted] Microstructure and Fatigue Properties of 6061 Aluminum Alloy Laser-MIG Hybrid Welding Joint

Figure 8

Fatigue fracture morphology of WJ under stress amplitude of 85.5 MPa. (a) Crack source and crack propagation region. (b) Partial enlargement of Figure 8(a). (c) Fatigue striations morphology in the crack propagation region. (d) Energy spectrum analysis result of the secondary phase particle in (c). (e) Transient region. (f) Partial enlargement of (e).