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Thermal fatigue

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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
.... The transgranular cracks suggested that thermal fatigue was a more likely cause of failure than SCC. It was concluded by temperature measurements that circumferential temperature gradients, in combination with inadequate flexibility in the piping system as a whole, had caused the failures. The tee fitting...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001675
EISBN: 978-1-62708-220-4
... Abstract The failure of a reformer tube furnace manifold has been examined using metallography. It has been shown that the cause of failure was thermal fatigue; the damage was characterized by the presence of voids produced by creep mechanisms operating during the high temperature cycle under...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001574
EISBN: 978-1-62708-223-5
... was a clear indication of high temperature exposure (due to insufficient cooling) during application. The most probable cause of failure was thermal fatigue. Grain boundaries Precipitation Punches WR-95 Chromium nitride coating Thermal fatigue fracture Background The CrN coated restrike...
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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046972
EISBN: 978-1-62708-217-4
... halfway from the leading edge to the trailing edge on the concave surface before ultimate failure occurred in dynamic tension. Analysis (including visual inspection, SEM, and 250x/500x micrographic examination) supported the conclusions that the blades failed due to thermal fatigue. Recommendations...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001346
EISBN: 978-1-62708-215-0
... Abstract Alloy UNS N08800 (Alloy 800) tubes of the steam superheating coils of two hydrocracker charge heaters in a refinery failed prematurely in service. Failure analysis of the tubes indicated that the failures could be attributed to thermal fatigue as a result of temperature fluctuations...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048850
EISBN: 978-1-62708-229-7
... before the stop valve. It was concluded using thermal stress analysis done using numerical methods and software identified as CREPLACYL that one or more severe thermal downshocks might cause the damage pattern that was found. The root cause of the failure was identified to be thermal fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001314
EISBN: 978-1-62708-215-0
... the allowable operating temperature for the fluid. The probable cause for failure is thermal fatigue due to the localized overheating. Flow conditions inside the tubing should be reexamined to ensure suitable conditions for annular fluid flow. Cracking (fracturing) Heat exchangers Mechanical properties...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001110
EISBN: 978-1-62708-214-3
... surface were examined. Both fractographic and metallographic features revealed that the failure was by thermal fatigue caused by the presence of biaxial thermal stresses on the inner surface of the tube. It was recommended that the steam and air be thoroughly mixed prior to entering the tube to decrease...
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Published: 15 May 2022
Fig. 3 Thermal fatigue failure and conventional fatigue crack-propagation fracture during reversed-load cycling of acetal. Source: Ref 36 More
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Published: 01 December 1992
Fig. 8 Notched modified fatigue specimen used for thermal fatigue experiments. More
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Published: 01 January 2002
Fig. 31 Thermal fatigue cracking of a spur gear. (a) Radial cracking due to frictional heat against the thrust face. 0.4×. (b) Progression of thermal fatigue produced by the frictional heat. 1.5× More
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Published: 01 January 2002
Fig. 29 Thermal fatigue plus liquid-ash corrosion on water walls leads to circumferential grooving. The cross section in an axial plane nearly parallel to the tube axis shows the deep fingerlike penetrations into the wall. Etched with nital. 210×. Courtesy of Riley Stoker Corp. More
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Published: 01 January 2002
Fig. 33 Crazed pattern of thermal fatigue cracking on the outer surface of a stainless steel tube. See also Fig. 37 . Approximately 4× More
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Published: 01 January 2002
Fig. 37 Stainless steel superheater tube that failed by thermal fatigue and stress rupture. (a) Photograph of the tube showing thick-lip rupture. (b) Macrograph of a section taken transverse to a fracture surface of the tube showing that thermal fatigue cracking started at the outside surface More
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Published: 01 June 2019
Fig. 1 Oxidation and thermal fatigue cracking of a cast ductile iron rotor. See also Fig. 2 , 3 , 4 , 5 , 6 , and . More
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Published: 01 June 2019
Fig. 1 Micrographs of two turbine blades that failed by thermal fatigue. (a) Longitudinal section taken through origin of failure (upper left corner) of fractured blade showing the fracture surface in profile (top), oxidation on blade surface (left), and oxide-filled crack (arrow). 500x. (b More
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Published: 01 June 2019
Fig. 4 Transgranular thermal fatigue crack in vaporizer coil 5. More
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Published: 15 January 2021
Fig. 18 Fireside surface of a superheater tube shows apparent thermal-fatigue cracks at sites displaying visual alligatoring. Original magnification: 500×. Source: Ref 65 . Courtesy of D.N. French More
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Published: 30 August 2021
Fig. 74 Thermal fatigue cracking on the outer surface of a stainless steel tube More