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. 43 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. 20 Guideline chart for detecting and measuring fatigue striations and fatigue crack growth (FCG) progression markings. Updated from Ref 25 More

Fig. 34 Fatigue striations in a 2 xxx -series alloy shown in Fig. 33 . Fatigue cracking initiated at a rivet hole. SEM; original magnification: 750× More

Fig. 37 Fatigue striations in a 2024-T3 specimen fatigue tested in a 3.5% NaCl in water solution. Fissures or more pronounced striations are observed, which may reflect repetitive variation in strain amplitude or stress, periodic interruptions in applied stress cycles, or both. SEM; original More

Fig. 38 Fatigue striations on the fracture surface of a 2024-T3 fatigue test specimen in the region of final fast fracture. SEM; original magnification: 1400×. Source: Ref 4 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

Fig. 84 Typical ridges and fatigue striations on the fracture surface of an annealed Incoloy 800 specimen tested in a sulfidizing atmosphere in the 316- to 427- °C (600- to 800- °F) temperature range. (b) Higher-magnification fractograph of the area indicated by arrow in (a). Note the width More

Fig. 17 Poorly defined fatigue striations in a low-carbon steel specimen More

Fig. 1029 A typical region in an area A of Fig. 1027 . Fatigue striations that are nearly vertical (arrow) are faintly visible. These were found to be parallel to the flaw (B-B in Fig. 1027 ) in both A areas in Fig. 1027 . Scattered dimples are evident in locations adjacent to the fatigue More

Fig. 1030 Highly magnified view of fatigue striations typical of those in areas A in Fig. 1027 . In general, these striations were parallel with the flaw B-B. Dimples characterized the remainder of the fracture. Inclusions near the flaw suggested that it was the result of a pipe not cropped More

Fig. 1038 Area Z in Fig. 1037 , which shows clear, well-defined fatigue striations. Normals to the striations point to the crack origin at the nearby corner of the attachment hole. SEM, 670× More

Fig. 1039 Area W in Fig. 1037 , showing very regular fatigue striations. Like those in Fig. 1038 , the striations here are oriented so that normals to them point to the corner near area Z. SEM, 1800× More

Fig. 1323 Fatigue striations in medium-density polyethylene. Crack growth direction is left to right. Loading conditions: σ min /σ max = R = 0.5, where σ max = 0.3 σ yield and σ yield = 22.6 MPa (3.278 ksi); frequency = 0.5 Hz. SEM, 200× (A.S. Moet, Case Western Reserve University) More