Fig. 4 Fatigue striations typical of the flat fatigue surface (region A of Fig. 3(b) ). Magnification 2000×. Clearly defined fatigue striations from region B (of Fig. 3(b) ). Magnification 1800×. More

Fig. 4 Fatigue striations of the fracture surface characteristic of cyclic fatigue and used in the cyclic stress evaluation. More

Fig. 8 Transmission electron micrograph of replica showing fatigue striations on the retaining nut fracture face More

Fig. 6 Fatigue striations and crack growth bands along varying fracture locations in the turbine blade. (a) 2-mm from crack initiation; (b) 13-mm from crack initiation region; (c) 18-mm from initiation region; (d) 26-mm from initiation. More

Fig. 1 SEM showing fatigue striations approximately 0.36 in. away from the origin More

Fig. 3 Fatigue striations from random loading on fracture surface of failed spar. (638× approx.). More

Fig. 5 Fourier transform power spectrum of fatigue striations: (a) scanning electron fractograph of fatigue striations on failed spar fracture surface (11,475× approx.) and (b) resulting Fourier transform power spectrum. More

Fig. 5 Fatigue striations associated with “beach marks.” More

Fig. 6 Fatigue striations on the facets of tantalum grains. More

Fig. 7 Ductile fatigue striations, crack propagation zone of Figure 5 . More

Fig. 4 Fatigue striations on the surface of the rupture More

Fig. 14 Fracture surface of the IRA. (a) Cracks. (b) Fatigue striations More

Fig. 8 Fatigue striations on the fracture surface located away from the inner diameter of the drive shaft indicate the region of fatigue fracture. More

Fig. 13 Fatigue striations ( parallel lines ) observed on a fracture near a MnS inclusion ( top left ) More

Fig. 10 SEM micrograph of fatigue striations observed on the fracture surface shown in Fig. 4(a) More

Fig. 11 Higher-magnification SEM micrograph of fatigue striations observed on the fracture surface shown in Fig. 4(a) More

Fig. 4 Scanning electron micrograph showing fatigue striations and secondary fatigue cracks More

Fig. 5 Fracture surface of the screw with fatigue striations (SEM image) More

Fig. 3 SEM image. Fracture surface presenting fatigue striations More

Fig. 5 SEM micrograph showing fine and coarse fatigue striations on the crack surface. Arrow indicates crack growth direction. More