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

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

Fig. 4 Fatigue striations on the surface of the rupture 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. 5 Fatigue striations associated with “beach marks.” More

Fig. 6 Fatigue striations on the facets of tantalum grains. 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. 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. 33 Fatigue striations in 18-8 austenitic stainless steel tested in rotating bending. (a) Fine striations were located midway between origin and final overload fracture, while (b) coarse striations were located closer to the overload area. Overall direction of crack growth in these SEM More