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Crack propagation

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001576
EISBN: 978-1-62708-219-8
... Abstract Macrofractographs of the fracture surface from a multibladed fan showed that cracks started at the corner where bending stress was concentrated and propagated through the blade by fatigue. Peak stress at the monitoring position was less than 10 MPa. To simulate crack growth, the rotor...
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Published: 01 December 1993
Fig. 7 Fatigue crack propagation region of device in Fig. 6 . Crack propagated from upper left to lower right. More
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Published: 01 December 1992
Fig. 9 Typical crack network, revealing an intergranular mode of crack propagation. 2% nital etch. 385×. More
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Published: 01 December 2019
Fig. 6 Crack propagation on fracture surface (arrow points to direction of crack propagation) More
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Published: 01 December 2019
Fig. 3 SEM morphology of the area C; ( a ) the crack propagation ( b ) crack tip More
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Published: 01 January 2002
Fig. 3 Change in surface roughness due to crack propagation. Fracture surface roughness increases with distance of propagation, crack propagation rate, and decreased strength level. This component failed in fatigue. Crack initiation was on a longitudinal plane visible at the top in a surface More
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Published: 01 January 2002
Fig. 29 Mechanical twins likely nucleated by cleavage crack propagation in a Fe-Cr-Mo alloy. Specimen taken from high strain rate, expanded tubing. Nomarski contrast illumination. Source: Ref 44 More
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Published: 01 January 2002
Fig. 32 Macroscale brittle crack propagation due to combined mode I and mode II loading. As cracks grow from the preexisting cracklike imperfection, crack curvature develops because of growth on a plane of maximum normal stress. Source: Ref 11 More
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Published: 01 January 2002
Fig. 42 Fatigue crack propagation rate versus stress intensity factor range. Fatigue striations may be present on the fracture surface for loading in the linear portion of the curve (Paris Law region), and permit analytical estimations of life to fracture. Just as fracture toughness varies More
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Published: 01 January 2002
Fig. 42 Radial marks typical of crack propagation that is fastest at the surface (if propagation is uninfluenced by the configuration of part or specimen) More
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Published: 01 January 2002
Fig. 43 Chevron patterns typical when crack propagation is fastest below the surface. It is also observed in fracture of parts having a thickness much smaller than the length or width (see middle illustration in Fig. 40 ). More
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Published: 01 January 2002
Fig. 46 Crack propagation in shear bands in a 7075-T6 plate specimen. Shear banding has occurred on four planes of high shear stress (two containing the width direction and two containing the thickness direction). Crack initiation has occurred in multiple locations, including the edge More
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Published: 01 January 2002
Fig. 44 SEM views of intergranular facets within fatigue crack propagation area of cold-worked electrolytic tough pitch copper tested in rotating bending at moderately low stress More
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Published: 01 June 2019
Fig. 7 Ductile fatigue striations, crack propagation zone of Figure 5 . More
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Published: 01 June 2019
Fig. 5 Fatigue crack propagation test More
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Published: 01 January 2002
Fig. 6 Crack propagation through delta ferrite and sigma phases in type 347 stainless steel. Source: Ref 3 More
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Published: 01 June 2019
Fig. 2 Observed crack propagation directions around manway. More
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Published: 01 June 2019
Fig. 6 Longitudinal section, unetched. Crack propagation from slag streak to streak. More
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Published: 01 June 2019
Fig. 2 Schematic showing directions of crack propagation, as indicated by chevron marks More
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Published: 01 June 2019
Fig. 3 a). Etched in aqueous nitric acid 1:1 at 2 V for 3 min. Crack propagation, cross-section (Same area after different etching treatments). 200 × b). Etched in V 2 A pickling solution (50 ° C). Crack propagation, cross-section (Same area after different etching treatments). 200 × More