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creep-fatigue crack growth testing

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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
... in the component. In these cases, most of the life of the component is spent in crack growth. This involves assessment of fracture resistance rather than a strength assessment based on bulk creep rates and time to stress rupture. Therefore, creep life assessment may involve evaluation of both creep strength (i.e...
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
... in crack initiation and growth during the initial stages of creep can make only relatively small differences in total elongation. Thus, replicate tests can exhibit large differences in total elongation but very small differences in true elongation. Fig. 8 Relation of elongation and rupture life...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006921
EISBN: 978-1-62708-395-9
... Chemical Degradation Creep and Creep Rupture Testing Environmental Stress Crack Resistance Testing Fatigue Testing Useful Prediction Models Hydrostatic Design Basis Approach Creep Chemical Degradation and Aging Testing Collecting Short-Term Testing Data for a Lifetime Assessment...
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
... fraction rule Parameter-based assessments Thermal-mechanical fatigue (TMF) Coating evaluations Hardness testing Microstructural evaluations Creep cavitation damage assessment Oxide-scale-based life prediction High-temperature crack growth methods Definition of Damage, Life...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006940
EISBN: 978-1-62708-395-9
.... , Effect of Strain Rate on Stepwise Fatigue and Creep Slow Crack Growth in High Density Polyethylene , J. Mater. Sci. , Vol 35 (No. 8 ), 2000 , p 1857 – 1866 29. Harcup J.P. et al. , Fatigue Crack Growth in Polyethylene: Material Dependence. I: Tensile/Compressive Loading , Polym. Eng...
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 metal temperature during steady-state operation is approximately 538 °C (1000 °F), which is in the creep regime; therefore, creep-fatigue crack initiation and crack growth are the dominant damage mechanisms. Cracks have been found to occur in casings that have been removed from service after being...
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
..., creep-fatigue crack initiation and crack growth are the dominant damage mechanisms. Cracks have been found to occur in casings that have been removed from service after being in operation for 25 years or longer ( Ref 12 ). Thus, to ensure the integrity of the casings, it is necessary to inspect them...
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
... techniques for cavitation and creep failure Aloha Incident, Boeing 737 ( Ref 13 ) 1988 Accelerated corrosion and multiple fatigue crack-initiation sites in riveted fuselage skin Improved aircraft maintenance and inspection procedures Life assessment methods developed for multiple-site damage (MSD...
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 Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006802
EISBN: 978-1-62708-329-4
... as creep rupture. Most brittle fractures of steels occur because structural components are operating at temperatures below the ductile-brittle transition temperature or the nil-ductility transition temperature. Consequently, the structure is unable to maintain subcritical crack growth, and failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... corrosion products. Scanning electron microscopy, on the other hand, can reveal the precise mode of failure, e.g., transgranular, intergranular or a mixed mode type fracture [ 1 ], including other details of crack propagation, e.g., creep, fatigue or a mixed mode of propagation [ 2 , 3 ]. Prior to any...
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
..., with 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...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006865
EISBN: 978-1-62708-395-9
...-displacement curve for a ductile polymer tested in uniaxial tension Fig. 1 Typical stress–strain curve for a fiber, a plastic, and an elastomer Fig. 2 Typical creep and creep rupture behavior of ductile polymers Fig. 3 Typical creep and creep rupture behavior of nonductile...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... coverage on specific types of fracture (processes such as ductile and brittle fracture, fatigue, creep, and complex environmentally assisted cracking from stress-corrosion cracking and hydrogen embrittlement) can be found in other articles in this Volume. Articles on the fractographic appearances...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... describes the general features of fatigue fractures in terms of crack initiation and fatigue crack propagation. brittle fracture crack initiation creep fracture deformation ductile fracture failure analysis fatigue crack growth fatigue crack propagation fatigue fracture fractography fracture...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... testing. Example 1: Cracking of a Turbine Disc due to Creep The typical life span of a turbine disc is >100,000 h. A fifth-stage turbine disc was found to have significant cracking after ~16,000 h of operation; the inspection that identified the crack was prompted by an unplanned outage...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006819
EISBN: 978-1-62708-329-4
... loading. Note that many different conditions can invalidate the assumption of an endurance limit, including, but not limited to, variable-amplitude loading, occasional overloading, a corrosive or high-temperature environment (where corrosion fatigue or creep fatigue interaction can accelerate damage...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006918
EISBN: 978-1-62708-395-9
... Optical micrographs showing the nucleation and growth of a mode I fatigue crack in the plane of the notch as a result of cyclic compression loading in high-impact polystyrene; (a) crazing before fatigue cycling, (b) nucleation of fatigue crack after 15,000 cycles, (c) crack growth after 20,000 cycles...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... be influenced by various time- or temperature-dependent mechanisms, such as fatigue, stress-corrosion cracking, liquid metal embrittlement, solid metal embrittlement, hydrogen embrittlement, and creep. In addition, transgranular cracks also can, at some point, follow a grain-boundary path for short distances...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
... overload fracture can be influenced by various time- or temperature-dependent mechanisms, such as fatigue, stress-corrosion cracking (SCC), liquid-metal embrittlement, solid-metal embrittlement, hydrogen embrittlement, and creep. In addition, transgranular cracks also can, at some point, follow a grain...