Fig. 22 High-magnification views of fatigue striations. (a) Striations (arrow) on the fracture surface of an austenitic stainless steel. (C.R. Brooks and A. Choudhury, University of Tennessee). (b) Fatigue striations on the facets of tantalum grains in the heat-affected zone of a weldment More

Fig. 16 Intermingled dimples and fatigue striations in low-cycle fatigue test fractures in aluminum alloy 2024-T851 at a high range of stress intensity (Δ K ) at the crack tip. Orientation of fatigue striations differs from patch to patch, particularly in fractograph (a). Dimples More

Fig. 52 Fatigue striations in a vanadium HSLA steel. (a) L-T orientation; Δ K = 32.3–34.3 MPa m . da / dN = 3.3–3.8 × 10 −5 cm/cycle. (b) T-L orientaton; Δ K = 24.3–25.5 MPa m , da / dN = 9.4–11.2 × 10 −6 cm/cycle. Source: Ref 54 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

Fig. 34 SEM view of fatigue striations in aluminum forging tested under cyclic loading More

Fig. 49 SEM view of fatigue striations in medium-density polyethylene, laboratory tested at 0.5 Hz with maximum stress 30% of the yield strength. Crack growth is upward in this view. Original magnification 200×. Source: Ref 4 More

Fig. 24 Fatigue striations on the fracture surface of a polycarbonate plumbing fixture after field failure. 32× More

Fig. 1 Examples of fatigue striations seen on the pin surface from the Loran tower failure More

Fig. 14 A local area of fatigue striations on an extruded 2024 aluminum alloy component More

Fig. 13 Ductile fatigue striations in aluminum alloy 2024-T3. (a) The uniformity of the crack-propagation process is well illustrated. There was little or no interaction of the fracture process with the inclusion within the rectangle. The long ridges are believed to be high-angle steps More

Fig. 21 Fatigue striations in a cast A356 aluminum alloy. (a) 500×. (b) 1500× More

Fig. 12 Fatigue striations in a low-alloy steel casting. Original magnification: 2000×. Courtesy of Stork Technimet, Inc. New Berlin, WI More

Fig. 20 Uniformly distributed fatigue striations in an aluminum 2024-T3 alloy. (a) Tear ridge and inclusion (outlined by rectangle). (b) Higher-magnification view of the region outlined by the rectangle in (a), showing the continuity of the fracture path through and around the inclusion More

Fig. 21 Schematic illustrating fatigue striations on plateaus More

Fig. 6 Fatigue striations observed by Zapffe ( Ref 50 ) in an aluminum alloy specimen tested in completely reversed bending, at a maximum stress of 172 MPa (25 ksi) at room temperature, to failure at 336× 10 3 cycles More

Fig. 17 Uniformly distributed fatigue striations in an aluminum 2024-T3 alloy. (a) Tear ridge and inclusion (outlined by rectangle). (b) Higher-magnification view of the region outlined by the rectangle in (a) showing the continuity of the fracture path through and around the inclusion More

Fig. 19 Fatigue striations in a 2024-T3 aluminum alloy joined by tear ridges More

Fig. 20 Fatigue striations on adjoining walls on the fracture surface of a commercially pure titanium specimen. (O.E.M. Pohler, Institut Straumann AG) More

Fig. 21 Fatigue striations on the fracture surface of a tantalum heat-exchanger tube. The rough surface appearance is due to secondary cracking caused by high-cycle low-amplitude fatigue. (M.E. Blum, FMC Corporation) More

Fig. 26 Schematic illustrating fatigue striations on plateaus More