PSI - Issue 19

Keiji Yanase et al. / Procedia Structural Integrity 19 (2019) 504–512 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

7

510

100μm

2mm

25 μ m

10μm

Fig. 10. SEM images of shear-mode fatigue crack in a failed specimen (Material A). (  a = 660 MPa,  static = -1000 MPa and failed at N f = 3.2  10 6 cycles)

(a) Crack length (b) Crack propagation rate Fig.11. Fatigue crack growth behavior of two shear-mode cracks in a run-out specimen (Material A). (  a = 550 MPa,  static = -1000 MPa and run-out at N = 1.2  10 7 cycles)