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creep life

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001738
EISBN: 978-1-62708-220-4
..., the oxidation-cracks stopped. To determine the residual creep life of the sound (non-cracked) bottom manifold material, iso-stress creep tests were performed. It was found that tertiary creep started at 7% strain. The time-to-rupture was greater than 100,000 h. It was concluded that the bottom manifold...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
..., microstructural evaluations, the creep cavitation damage assessment, the oxide-scale-based life prediction, and high-temperature crack growth methods. coating evaluation creep cavitation damage assessment elevated-temperature failure gas turbine blade hardness testing high-temperature crack growth...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... of In-Place Analysis ,” Microstructural Science , Vol. 12 , ASM , Metals Park, OH , pp. 537 – 549 ( 1985 ). 2. Roberts B. W. et al. , “ Metallographic Techniques for Estimation of Residual Creep Life ,” to be published in Proceeding of EPRI Conference on Life Extension and Assessment...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... for nickel. Source: Ref 21 Fig. 15 Logarithmic plot of stress-rupture stress versus rupture life for nickel-base alloy U-700 at 815 °C (1500 °F). The increasing slope of the curve to the right of the sigma break is caused by sigma-phase formation. Fig. 6 Creep life assessment based...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001279
EISBN: 978-1-62708-215-0
... thickness measured on ruptured ring section) The tube metal temperature was constant over the operating life of the tube The tube experienced about 8,000 hours of service each year A mean temperature of 528 °C (983 °F) was calculated to correspond to a creep life of about 13 years using...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... 1 0.00–0.12 7.33 Unknown 2 0.04–0.46 1.17 24.00 3 0.3–0.5 1.0 2.33 4 0.3–0.84 0.19 2.33 5 0.72–1.00 0 = failed 0.39 Source: Ref 9 Fig. 5 Creep life assessment based on cavity classification in boiler steels Fig. 8 Schematic creep curves for alloys...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
... at carbides and other microconstituents, especially in single crystal castings that do not possess grain boundaries. gas turbine engine components creep deformation overheating nickel-base superalloy interdendritic stress-rupture fracture stress-rupture testing stress-rupture life Cast nickel...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... of materials with improved toughness Seam-welded high-energy piping failures ( Ref 12 ) 1986–2000 Cavitation and creep voids in welds resulting in catastrophic high-energy rupture Development of elevated-temperature life assessment techniques for cavitation and creep failure Aloha Incident, Boeing 737...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001735
EISBN: 978-1-62708-220-4
... tube remaining life showed the welds to be inadequate, and to have a strength and creep resistance below those of the base metal. Reformer furnaces Tubine Welded joints HK-40 UNS J94224 Creep fracture/stress rupture A sample tube was removed from a reformer furnace for life assessment...
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
... that the process of 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...
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
... that the casing could be welded successfully, it was suggested that the remaining useful life was effectively exhausted and that it should be replaced. Thermal stresses produced during operation would rapidly result in additional cracks. Casings Gas turbines Thermal stresses 321 UNS S32100 Creep...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048845
EISBN: 978-1-62708-229-7
...Abstract Abstract The maximum life of base-loaded headers and piping is not possible to be predicted until they develop microcracking. The typical elements of a periodic inspection program after the occurrence of the crack was described extensively. Cracks caused by creep swelling in the stub...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0048303
EISBN: 978-1-62708-236-5
... spheroidization of the carbides in a ferrite matrix ( Figure 1b ). Inside-diameter scale was measured as 0.34 mm (0.0134 in., or 13.4 mils). At the time of the first creep failure, the question of the remaining life of the rest of the superheater must be addressed. The log stress versus LMP curves given...
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
... , typical of Incoloy 800H aged at 800 C. The average grain size was 150 um and no abnormal presence of second phases was observed. The allowable stresses used in this class of equipment are low, to permit a useful life of 100,000 h. At this stress level for Incoloy 800H, the formation of small creep voids...
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
.... , Fatigue, Creep, and Thermomechanical Fatigue Life Testing , Mechanical Testing and Evaluation , Vol 8 , ASM Handbook , 2000 , p 687 – 716 11. Aliabadi M.H. , Ed., Thermomechanical Fatigue and Fracture , WIT Press , 2002 12. Hulina V.E. , “Preliminary Results on the Mode...
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
... applying the specially designed methods given in this case study to estimate the metal temperature and stresses in order to predict the life of turbine blades under similar operating conditions. Gas turbine engines Grain boundaries Stress and strain analysis Thermal stresses Turbine blades...
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
... and Thermo-Mechanical Fatigue of Structural Alloys , Fatigue Fract. , Vol 19 , 1996 , p 527 – 556 10.31399/asm.hb.v19.a0002391 25. Halford G.R. and Lerch B. , Fatigue, Creep Fatigue, and Thermomechanical Fatigue Life Testing , ASM International , Materials Park, OH , 2000 , p 686...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... details on testing are given in the article “Fatigue, Creep Fatigue, and Thermomechanical Fatigue Life Testing” in Mechanical Testing and Evaluation , Volume 8 of the ASM Handbook , 2000. Damage Tolerance Criterion In the latter half of the 20th century, the fracture mechanics approach gained...
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
... of damage and remaining life in reformer furnace tubes . Int. J. Press. Ves. Pip. 66 , 233 – 241 ( 1996 ) 10.1016/0308-0161(95)00098-4 2. Ul-Hamid A. , Tawancy H.M. , Mohammed A.-R.I. , Abbas N.M. : Failure analysis of furnace radiant tubes exposed to excessive temperature...
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
... gradient within the part. It has also been established that a reduction in fatigue life takes place due to the occurrence of intergranular cracking and due to the effect of oxidation ( Ref 7 ). Grain boundary oxidation may produce a notch effect that may limit the fatigue life. In the present case, creep...