Fig. 27 Metallographic examination of primary crack. Fracture path followed prior-austenite grain boundaries. No precipitates in grain boundaries (50 μm) were observed. More

Fig. 6.103 SEM macrograph at ID edge showing multiple crack initiation points (white arrows) and auxiliary cracking on crack fracture surface (black arrows). The overall fracture surface was relatively brittle and covered with corrosion products/scales, 50×. More

Fig. 45 SEM image of the fracture surface of a PM 434L sintered part which failed due to intergranular stress corrosion cracking. Fracture progressed along the grain boundaries of the well-sintered sample More

Fig. 37 Fracture surface of the crack in the failed screw after the crack was opened in the laboratory. “L” indicates the laboratory-induced overload region. Original magnification: 20×. Source: Ref 20 More

Fig. 9.6 Practical fracture toughness specimens. (a) Symmetrical center-cracked plate. Source: Ref 9.13 . (b) Symmetrical edge-cracked plate. Source: Ref 9.13 . (c) Bend specimen. Source: Ref 9.14 . More

Fig. 9.8 Orientation of crack in fracture specimen to major forming directions in plate stock. Source: Ref 9.14 More

Fig. 10.32 Crack-growth striations in fracture surface of 6 mm (¼ in.) diam polycarbonate-resin specimen; 115 cycles to fracture. Source: Ref 10.32 More

Fig. 12.18 Crack growth striations on fracture surface of ¼ in. diam polycarbonate-resin specimen; 115 cycles to fracture. Source: Ref 12.5 More

Fig. 7.23 Influence of hydrogen content on the crack stress and fracture stress. Source: Ref 38 More

Fig. 11 Intergranular fracture in case unstable crack propagation zone in gas-carburized and direct-cooled SAE 4320 steel More

Fig. 3.12 Examples of PC fracture initiated by oxide cracking in AISI type 316 stainless steel at 760 °C (1300 °F). (a) Before oxide removal. (b) After oxide removal. Source: Ref 3.3 More

Fig. 6.34 (a) Microstructure of fracture edge with grains of ferrite and creep crack along with oriented creep cavities, 400×; (b) normal ferrite-pearlite structure away from failure location, 400× More

Fig. 5 Surface of a torsional fatigue crack that caused brittle fracture of the case of an induction-hardened axle of 1541 steel. The fatigue crack originated (arrow) at a fillet (with a radius smaller than specified) at a change in shaft diameter near a keyway runout. Case hardness was about More

Fig. 7 Stress-corrosion crack in a high-strength steel part (4×). The fracture surface appears to have the characteristic beach mark pattern of a fatigue fracture. However, this was a stress-corrosion fracture in which the pattern was caused by differences in the rate of corrosion penetration More

Fig. 73 Fracture surface of the exposed crack in the shank of bolt I More

Fig. 74 Fracture surface of the exposed crack in the head fillet radius of bolt I More

Fig. 10.4 Sketch showing some fibers fracturing at a crack and others pulling out. Source: Ref 10.1 More

Fig. 3 Thermal fatigue failure and conventional fatigue crack propagation fracture during reversed load cycling of acetal. Source: Ref 10 More

Fig. 26 Scanning electron image showing brittle fracture features at the crack initiation site, characteristic of environmental stress cracking. 24× More