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Thermal shock

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001477
EISBN: 978-1-62708-229-7
... of the boiler where the cracking developed had been subjected to a severe thermal shock, further consideration was given to this aspect. Possible causes would include loss of water from the drum while in service necessitating the injection of cold feed water as an emergency measure. If this occurred, it would...
Image
Published: 01 January 2002
Fig. 17 Glass plate broken in thermal shock. The fracture origin is at the lower edge of the plate. Note how the crack is normal to this edge. The “meandering” shape of the crack is typical of thermal-shock failure of plates. Camera image; picture width ∼20 mm More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0090451
EISBN: 978-1-62708-218-1
... Abstract Cracking occurred within the plastic jacket (injection molded from an impact-modified, 15% glass-fiber-reinforced PET resin.) of several assemblies used in a transportation application during an engineering testing regimen which involved cyclic thermal shock (exposing the parts...
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
... of the shell wall itself. The boiler had been in operation for approximately 160,000 h and was shut down for inspection when the cracking was detected. The material involved was 2.25 Cr, 1 Mo steel, and the unit had been subjected to 115 shutdowns. Initiation of the cracks was attributed to thermal shock...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001391
EISBN: 978-1-62708-215-0
... Abstract Several surface-mount chip resistor assemblies failed during monthly thermal shock testing and in the field. The resistor exhibited a failure mode characterized by a rise in resistance out of tolerance for the system. Representative samples from each step in the manufacturing process...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001146
EISBN: 978-1-62708-229-7
... a thermal shock in the pipe which, when cooled below its NDTT, cracked in a brittle manner. Low temperature Nil ductility transition temperature Nuclear power generation Piping Thermal shock ASTM A516 grade 70 UNS K02700 Brittle fracture Introduction On February 3, 1984, Georgia Power...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001334
EISBN: 978-1-62708-215-0
... of the cooling water, or periodic thermal shock. Intake screens are now available with mesh sizes as fine as 0.5 mm (0.02 in.). The thermal shock method involves recirculating the cooling water to allow the temperature to increase to 50 °C (120 °F), a condition that ensures the death of most organisms...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001771
EISBN: 978-1-62708-241-9
... the ductility of the tube. Thermal shocking during decoking prevented the tube from formation of oxide layer and the coke could easily deposit on the inner surface. Deposited coke had several effects on mechanical and failure properties: The principal conclusions that can be drawn from the present work...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003542
EISBN: 978-1-62708-180-1
... the piece broke in response to uniaxial tension, bending, or thermal shock. (Nominal external torsion and compression loading are excluded from this discussion, because the internal local state of stress that causes fracture in both cases is still tension.) Transgranular Fracture Fracture through...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001056
EISBN: 978-1-62708-214-3
... of the pipe was 280 °C (535 °F); every 20 s, a “strip” of water at 140 °C (285 °F) moved cyclically on the surface. This implies that a quasi-stationary process governed the phenomenon. A thermal shock condition appeared to be of minor importance, because it involved only a very thin layer of material...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001849
EISBN: 978-1-62708-241-9
... – 6 ]. Spalling can be divided into two principal categories according to the mechanism of failure [ 2 , 7 ]: Surface-initiated spalling that originates from thermal shock or firecracks or a stress raiser (e.g., bruise, roll mark, gouges) lying on the roll surface and propagates radially...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001143
EISBN: 978-1-62708-229-7
... of failure. Damage mechanisms which can act on the blades include fatigue, corrosion, erosion and thermal shock. There are also combinations of these damage mechanisms, such as corrosion fatigue, which possess unique characteristics that are different from the characteristics of the two main damage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001638
EISBN: 978-1-62708-228-0
... used successfully in this application worldwide. During the 1960s, numerous failures of HK, HT, and HU cast headers and transfer lines were experienced. This was mainly due to lack of ductility of the cast alloys with an accompanying lack of resistance to thermal shock. Wrought Incoloy 800H, while...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003551
EISBN: 978-1-62708-180-1
... 2 O 3 <2%), and iron oxide (Fe 2 O 3 <1.5%). They have high corrosion resistance to acid slags but are sensitive to high temperatures and to thermal shock, even at medium temperature levels. Bricks with reduced porosity and lower alumina content may be used to prevent rapid degradation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001003
EISBN: 978-1-62708-227-3
.... One might speculate that boiling on the desuperheater surface might damage by thermal shock the magnetite film depended upon for protection against corrosion, but this can hardly have been the case: the generating tubes of the same boiler certainly experienced thermal shocks certainly no less severe...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... coatings, thermal barrier coatings, and ceramic coatings. aluminide coatings carburization ceramic coatings chloridation corrosion fatigue high temperature corrosion hot corrosion hydrogen interaction metal dusting molten metals molten salts overlay coatings oxidation protective coatings...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001717
EISBN: 978-1-62708-217-4
... thermal treatment. These large grains offered less resistance to fatigue and SCC. In addition, evidence of titanium-carbo-nitrides was detected at the grain boundaries of this material that was prohibited according to the governing specification. This phase is formed at higher thermal treatment...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
... was considered as the major source of thermal loading for thermal shock simulation. For inner surface the convection coefficient h out = 10 W/m 2 °C is applied [ 8 ] while the convection coefficient h in = 306 W/m 2 °C is applied for loading (heating up to 240 °C) the outer surface and h in = 490 W/m...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001449
EISBN: 978-1-62708-221-1
... treated” by a subsequent run. Short cracks were present in the root and at the mid-width of the weld face. The hardness of the inner runs was 170 VDP, that of the outer run was 250, and the thermally disturbed zone gave a figure of 280. Fig. 3 Transverse section through weld showing crack origin...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048777
EISBN: 978-1-62708-229-7
... lead to local embrittlement and stress raisers, potentially initiating major failures. Boilers Hydrotesting Stress relieving thermal stresses ASTM A515 Grade 70 UNS K03101 Joining-related failures (Other, general, or unspecified) fracture A 150-cm (60-in.) inside-diameter boiler drum...