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low-cycle fatigue

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001149
EISBN: 978-1-62708-232-7
... of rolled and welded COR-TEN steel plate butt welded together on site. The pipe sustained local buckling and cracking, then fractured during the first five months of operation. Failure was due to low cycle fatigue and fast fracture caused by differential thermal expansion stresses. Thermal lag between...
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Published: 01 June 2019
Fig. 9 Low cycle fatigue test data. More
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Published: 01 December 2019
Fig. 6 Close-up view of regions of propagation under low-cycle fatigue mechanisms. Note that the beach marks appear with more textures and pronounced than those shown in Fig. 5 More
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Published: 01 December 1992
Fig. 3 Probability of detection af bolt hole low-cycle fatigue cracks in compressor disks using liquid penetrant inspection. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048361
EISBN: 978-1-62708-234-1
... that failed by low-cycle thermal fatigue. Top: original design. Inset shows the locations of thermocouples used in analyzing thermal gradients and the typical temperatures at each thermocouple location. Bottom: the analysis resulted in an improved design. Dimensions given in inches Investigation...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001081
EISBN: 978-1-62708-214-3
... the fifth-stage compressor disk (judged to be the most crack-prone disk in the compressor) to determine the cause of the failures. Failure was attributed to high-strain low-cycle fatigue during service. It was also determined that the cyclic engine usage assumed in the original life calculations had been...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090181
EISBN: 978-1-62708-229-7
... Abstract Cracking in gas turbine blades was found to initiate from a mechanism of low-cycle fatigue (LCF). LCF is induced during thermal loading cycles in gas turbines. However, metallography of two cracked blades revealed a change in microstructure at as-cast surfaces for depths up to 0.41 mm...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0048596
EISBN: 978-1-62708-221-1
.... Hardenability Low cycle fatigue 1045 UNS G10450 Heat treating-related failures Fatigue fracture When a farm tractor is to be used on sticky or wet soils, it is common practice to attach dual driving wheels to the rear axles of the tractor by using fittings such as that shown in Fig. 1 . SAE, grade 5...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001296
EISBN: 978-1-62708-215-0
... that the part failed by low cycle fatigue. The fracture was brittle in nature and had originated at a severely eroded zone of craters in a hard, deep white layer that was the result of remelting during electrodischarge machining. It was recommended that the remaining parts be inspected using a stereoscopic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001001
EISBN: 978-1-62708-229-7
..., caused by the periodic return of condensate along the long connecting line (some 9 m long). Propagation of the cracks was due to thermal cycling, together with periodic pressure cycles, producing growth by low cycle fatigue. This was aided by corrosion within the cracks and by the wedging action caused...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001506
EISBN: 978-1-62708-217-4
.... A bracket which supports the in-line fuel flow transducer also was found broken. Examination of the elbow fracture revealed characteristics of low-cycle fatigue failure. Examination of the support bracket fractures revealed a high-cycle mode of fatigue failure, with the primary fatigue extending along...
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
... occurred when the tubing was idle and fluids accumulated at the bottom of the tubing wraps. The coiled tubing was concluded to have failed prematurely due to low-cycle fatigue initiated at corrosion pitting sites. Corrosive attack on the coiled tubing was recommended to be reduced by completely removing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001593
EISBN: 978-1-62708-234-1
... features of alternating cracking and arrest cycles, consistent with low cycle fatigue, as shown in Fig. 2 . The final fracture zone showed features associated with brittle overload, as evidenced by the significant concentration of hackle marks, and exhibited limited ductility in the form of isolated...
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Published: 01 January 2002
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
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Published: 01 June 2019
Fig. 2 Scanning electron image showing brittle fracture features and beach marks suggestive of low cycle fatigue More
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Published: 01 December 1993
Fig. 2 Mating fracture surfaces. 14.24× Failure initiated on the outside (convex) surface and progressed across the plate thickness by low-cycle fatigue. ∼15×. More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001794
EISBN: 978-1-62708-241-9
... Fig. 5 Close-up view of regions of propagation under high-cycle fatigue mechanisms. Note the smooth finish of the beach marks Fig. 6 Close-up view of regions of propagation under low-cycle fatigue mechanisms. Note that the beach marks appear with more textures and pronounced than those...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001002
EISBN: 978-1-62708-229-7
... was not due to fatigue only but can most probably be attributed to corrosion fatigue. The boiler steam drum design should be reviewed to reduce the local level of stress at the shell-nozzle connections. Boilers Corrosiun products Low cycle fatigue Steam drums Mn-Mo-V Corrosion fatigue During...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
... is also often a low-cycle fatigue issue, because relatively infrequent transients (compared to steady-state exposures) can contribute to the accumulation of TMF damage in various kinds of equipment, such as jet engines, land-based turbines for power generation, and pressure vessels. For example...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... engineering components or structures are or can be subjected to cyclic loads during their lifetime. Fatigue may be categorized as low-cycle fatigue or high-cycle fatigue. Low-cycle fatigue occurs after a relatively low number of cycles, whereas high-cycle fatigue occurs after a relatively high number...