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Thermal fatigue fracture

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Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... the crack depth becomes almost 25 mm (1 in.). Figure 16 shows the Δ K versus crack depth for crack sizes A, B, and C. The Δ K due to thermal stresses is labeled Δ K thermal , and Δ K due to pressure stresses, Δ K p ; these values are plotted separately in Fig. 16 . In fracture mechanics...
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
... Thermal fatigue fracture High-temperature corrosion and oxidation During disassembly of an engine that was to be modified, a fractured turbine blade was found. When the fracture was examined at low magnification, it was observed that a fatigue fracture had originated on the concave side of the...
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
... 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 the...
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
... 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 The CrN coated restrike punch was...
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
... redesigned to alleviate the thermal stress pattern. Design Heat exchanger tubes 304 UNS S30400 Thermal fatigue fracture Several failures occurred in 64-mm (2 1 2 -in.) schedule 80 type 304 stainless steel (ASME SA-312, grade TP304) piping in a steam-plant heat-exchanger system near tee...
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
... associated creep relaxation. Boilers Electric power generation Steam lines Thermal stresses 316 UNS S31600 Thermal fatigue fracture Visual inspection of a type 316 stainless steel main steam line of a major utility boiler system revealed cracks on its outer surface near a hanger lug. At that...
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
... high local stress. The study indicates that standard metallographic procedures can be used to identify failure modes in high temperature petrochemical plants. Creep (materials) Petrochemical plants Reformer tubes Incoloy 800H UNS N08810 Thermal fatigue fracture Tubing operating at high...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001570
EISBN: 978-1-62708-220-4
... Thermal fatigue fracture Crevice corrosion In recent years, there has been a growing application of reactive metals in the processing equipment in chemical, petroleum, and power industries. Commercially pure titanium with desirable engineering properties as well as excellent corrosion resistance is...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001011
EISBN: 978-1-62708-229-7
... creep was not operative throughout the life of the equipment. Outlet tubes Overheating Oxidation Superheaters 2.25Cr-1Mo Creep fracture/stress rupture Thermal fatigue fracture After some 87,000 h of operation, failure took place in the bend of a steam pipe connecting a coil of the third...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001686
EISBN: 978-1-62708-220-4
... cracking was confined to the inner diameter of the vaporizer coil at positions from 4:00 to 7:00. The cracking was characterized as transgranular and the fracture surface had beach marks. The failure mechanism was thermal fatigue. The heat transfer calculation predicted that dryout of the coil would occur...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001709
EISBN: 978-1-62708-229-7
... (367 deg C) and 2935 psi (20.5 MPa), failed near the IK boxes as a result of thermal fatigue. Thermal fatigue damage was accelerated by repetitive exposure to water droplets from the soot blower and the associated rapid cooling. Boilers Electric power generation Tubes ASME SA210-A1 Thermal...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001737
EISBN: 978-1-62708-229-7
... rupture Thermal fatigue fracture In the example presented, creep damage assessment had been conducted without due consideration of the likely mechanisms of damage being given. The hot gas casing of a gas turbine used for peak load power production had developed extensive cracking during...
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
... by corrosion deposits at their tips. The failure suggests control of dissolved solids in the boiler feedwater may have been inadequate. Boilers Corrosion products Superheater headers 2.25Cr-1Mo Thermal fatigue fracture Corrosion fatigue Examination of the header of the third...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001392
EISBN: 978-1-62708-231-0
... thermal conditions may well have been experienced intermittently in service. Boiler tubes Leakage Rings Thermal stresses Steel Thermal fatigue fracture Following leakage which developed within the furnace of a horizontal multi-tubular type boiler, examination revealed a series of cracks...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046966
EISBN: 978-1-62708-229-7
... 5382 UNS R30031 Stellite 31 UNS R30031 Thermal fatigue fracture A turbine vane made of cast cobalt-base alloy AMS 5382 (Stellite 31; composition: Co-25.5Cr-10.5Ni-7.5W) was returned from service after an undetermined number of service hours because of crack indications on the airfoil sections...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0047343
EISBN: 978-1-62708-236-5
... Thermal fatigue fracture (Other, general, or unspecified) distortion High-temperature corrosion and oxidation An experimental high-temperature rotary valve was found stuck in the housing due to growth and distortion after approximately 100 h. Gas temperatures were suspected to have been high due to...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090114
EISBN: 978-1-62708-229-7
... Udimet 520 Creep fracture/stress rupture Thermal fatigue fracture High-temperature corrosion and oxidation This case history illustrates how to evaluate creep, oxidation, and TMF in a first-stage gas turbine blade. Often, it is necessary to estimate the temperature and the applied stress to...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001602
EISBN: 978-1-62708-229-7
... in the tip shroud region. Columnar grains Creep Equiaxed grains Hot corrosion Udimet 500 UNS N07500 Creep fracture/stress rupture High-temperature corrosion and oxidation Thermal fatigue fracture Most gas turbine bucket failures are caused by a combination of factors because the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001543
EISBN: 978-1-62708-218-1
... problems. The temperature in much of the piston was high enough to cause softening by overaging, lowering strength. Automotive engines Overheating Pistons Softening 357 UNS A03570 Thermal fatigue fracture Mixed-mode fracture High-temperature corrosion and oxidation The sustained high...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001305
EISBN: 978-1-62708-215-0
... brake. It was recommended that the brake system on the car be examined and replaced if necessary. Brake shoes Brakes Railroad wheels Railroads ASTM A504 Thermal fatigue fracture A railway car wheel failed during service, causing derailment. The wheel was completely fractured...