Search Results for beach marks

Fig. 14 Radial marks and beach marks on the fracture surface of an AISI/SAE 4140 low-alloy steel shaft that failed in torsional fatigue More

Fig. 54 Three views of a fatigue fracture in D6AC steel plate, showing beach marks. (a) Plate subjected to a series of varied loading cycles in the laboratory. The crack origin, at the bottom center, was at a starter notch formed by electrical discharge machining. (b) Area in lower square More

Fig. 9 Fracture at a wire defect. Beach marks are prominent beginning at the base of the flaw, which is indicated by the arrow. 39× More

Fig. 20 Beach marks on (a) quenched-and-tempered alloy steel pin fractured in low-cycle fatigue ( Ref 4 ), and on (b) maraging steel stud fractured in the laboratory by stress-corrosion cracking under steady load ( Ref 16 ). The presence of beach marks is indicative of progressive cracking More

Fig. 21 Curved beach marks are centered on the surface origin (arrow) of this shaft that failed in rotating bending fatigue. Beach marks are nearly semicircular near the origin. As the crack became larger, it grew more rapidly near the surface where bending stress was highest, resulting More

Fig. 14 Beach marks on a fatigue fracture in aluminum alloy 7075-T73 forging. The light-colored reflective bands are zones of fatigue crack propagation. At high magnifications, thousands of fatigue striations can be resolved within each band. The dull, fibrous bands are zones of crack More

Fig. 15 Fracture surface of steel shaft with beach marks produced by oxidation. More

Fig. 16 Beach marks on a 4340 steel part caused by SCC. Tensile strength of the steel was approximately 1780 to 1900 MPa (260 to 280 ksi). The beach marks are a result of differences in the rate of penetration of corrosion on the surface. They are in no way related to fatigue marks. 4× More

Fig. 69 Close-up view of fracture surface at the other web. Note beach marks. More

Fig. 21 Beach marks on a 4340 steel part caused by stress-corrosion cracking. Tensile strength of the steel was approximately 1780 to 1900 MPa (260 to 280 ksi). The beach marks are a result of differences in the rate of penetration of corrosion on the surface. They are in no way related More

Fig. 116 Close-up view of fatigue fracture surface with beach marks. Arrows indicate the initiation-site areas More

Fig. 20 (a) Beach marks on quenched-and-tempered alloy steel pin fractured in low-cycle fatigue ( Ref 4 ), and (b) arrest lines on a maraging steel stud fractured in the laboratory by stress-corrosion cracking under steady load ( Ref 16 ). The presence of arrest lines is indicative More

Fig. 21 Curved beach marks are centered on the surface origin (arrow) of this shaft that failed in rotating-bending fatigue. Beach marks are nearly semicircular near the origin. As the crack became larger, it grew more rapidly near the surface where bending stress was highest, resulting More

Fig. 22 Beach marks on a fatigue fracture in aluminum alloy 7075-T73 forging. The light-colored reflective bands are zones of fatigue crack propagation. At high magnifications, thousands of fatigue striations can be resolved within each band. The dull, fibrous bands are zones of crack More

Fig. 23 Fracture surface of steel shaft with beach marks produced by oxidation More

Fig. 24 Beach marks on a 4340 steel part caused by stress-corrosion cracking. Tensile strength of the steel was approximately 1780 to 1900 MPa (260 to 280 ksi). The beach marks are a result of differences in the rate of penetration of corrosion on the surface. They are not related to fatigue More

Fig. 2 Cyclic beach marks from high-frequency cyclic deformation More

Fig. 15 Fracture through an eccentric shaft. (a) Fracture surface with beach marks progressing from origin site at the bottom of the image. (b) Oblique view of the origin showing several ratchet marks and corrosion on the shaft outside diameter surface. (c) Crack profile. A small secondary More

Fig. 11 Scanning electron microscope images of (a) typical beach marks observed radiating from mechanical damage along the surface (black arrow) and (b) parallel crack arrays (red arrows) observed along the fracture surfaces More

Fig. 15 Failed compressor shaft cross section showing beach marks. Adapted from Ref 56 More