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fatigue striations

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Published: 01 December 1992
Fig. 5 Coarse fatigue striations on area B.∼1.8×. More
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Published: 01 December 1992
Fig. 6 SEM micrograph of area B, illustrating fatigue striations shown in Fig. 5 . 40×. More
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Published: 01 January 2002
Fig. 1 Examples of fatigue striations seen on the pin surface from the Loran tower failure More
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Published: 01 January 2002
Fig. 14 A local area of fatigue striations on an extruded 2024 aluminum alloy component More
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Published: 01 January 2002
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
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Published: 01 January 2002
Fig. 21 Fatigue striations in a cast A356 aluminum alloy. (a) 500×. (b) 1500× More
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Published: 01 January 2002
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
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Published: 01 January 2002
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 views More
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Published: 01 January 2002
Fig. 34 SEM view of fatigue striations in aluminum forging tested under cyclic loading More
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Published: 01 January 2002
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
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Published: 01 January 2002
Fig. 24 Fatigue striations on the fracture surface of a polycarbonate plumbing fixture after field failure. 32× More
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Published: 01 December 1993
Fig. 3 Areas adjacent to each fatigue origin exhibit fatigue striation artifacts, the result of interaction between slip lines and crystaltographic cleavage planes in the plastically deformed region. 630×. More
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Published: 01 January 2002
Fig. 13 Correlation of fatigue-striation patterns with the load history to estimate when a crack started in relation to the actual or predicted life of a part. (a) Cracked fitting. (b) and (c) Crack origin location. (d) Two distinct fatigue-striation patterns that were correlated to the load More
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Published: 30 August 2021
Fig. 13 Correlation of fatigue-striation patterns with the load history, to estimate when a crack started, as it relates to the actual or predicted life of a part. (a) Cracked fitting. (b) and (c) Crack origin location. (d) Two distinct fatigue-striation patterns that were correlated to the load More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001144
EISBN: 978-1-62708-217-4
... the aircraft was landed. The helicopter main rotor blade spar fracture was analyzed by conventional and advanced computerized fractographic techniques. Digital fractographic Imaging Analysis of theoretical and actual fracture surfaces was applied for automatic detection of fatigue striation spacing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047590
EISBN: 978-1-62708-217-4
... (orbital arc) welding. It was found that the tube had failed in the HAZ. Examination of a plastic replica of the fracture surface in a transmission electron microscope established that the crack origin was at the outer surface of the tube. The crack growth was by fatigue; closely spaced fatigue striations...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048413
EISBN: 978-1-62708-226-6
...Abstract Abstract A type 316L stainless steel angled plate failed. The fatigue fracture was found to have occurred at a plate hole. Symmetric cyclic bending forces were revealed by the fatigue damage at the fracture edge at the top surface of the plate. Fatigue striations and slip bands...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006406
EISBN: 978-1-62708-217-4
...-corrosion cracking (SCC) and fatigue striations near the crack origin. Visual examination of the crack edge revealed that the installation of the fasteners produced a fit up stress. Further inspection of the opened fracture showed that the crack had been present for some time because a heavy buildup...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c0047234
EISBN: 978-1-62708-233-4
... this fracture-initiation area showed fatigue striations. No casting or metallurgical structural defects were found that could explain the failures. This evidence supports the conclusion that cracking was a result of the stress-concentration site at the bolt holes where a fatigue-initiated fracture occurred...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0051866
EISBN: 978-1-62708-228-0
... indicative of tensile overload. The flat portion of the fracture surface was typical of fatigue cracking. Fatigue striations were revealed by SEM. Corrosion pitting on the tubing ID from which the fatigue crack had propagated were observed on closer examination. The corrosion pitting was speculated to have...