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Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003307
EISBN: 978-1-62708-176-4
... Abstract Predicting the service life of structural components involves creep-fatigue crack growth (CFCG) testing under pure creep conditions. This article provides a discussion on the loading condition and the type of ductile and brittle material showing creep behavior. It focuses...
Abstract
Predicting the service life of structural components involves creep-fatigue crack growth (CFCG) testing under pure creep conditions. This article provides a discussion on the loading condition and the type of ductile and brittle material showing creep behavior. It focuses on a description of the experimental method that should be followed in conducting tests of CFCG with various hold times. The article describes the testing conditions, definitions, and the necessary calculations of various crack-tip parameters considered during static and cyclic loading in time-dependent fracture mechanics. The parameters considered for static loading are C*, C(t), C*(t), C*h, Ct, and Cst(t). For cyclic loading, the parameters are delta Jc and (Ct)avg. An overview of life-prediction models is also provided.
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Published: 01 January 1996
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Published: 01 January 2002
Fig. 9 Power-law dependence of creep crack growth with K in less ductile materials. Source: Ref 11
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Published: 15 January 2021
Fig. 10 Power-law dependence of creep crack growth with K in less ductile materials. Source: Ref 19
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Published: 01 January 1996
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Creep crack growth rate from specimens of 63.5 mm (2.5 in.) thickness in wh...
Available to PurchasePublished: 01 January 1996
Fig. 11 Creep crack growth rate from specimens of 63.5 mm (2.5 in.) thickness in which crack growth occurred in small-scale, transition, and extensive creep regimes. Source: Ref 51
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Creep crack growth rate for chromium-molybdenum steels (tested at 1000 to 1...
Available to PurchasePublished: 01 January 1996
Fig. 12 Creep crack growth rate for chromium-molybdenum steels (tested at 1000 to 1022 °F) compiled from various laboratories. Source: Ref 7
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Creep crack growth rate for 304 stainless steels at 594 °C (1100 °F) with d...
Available to PurchasePublished: 01 January 1996
Fig. 13 Creep crack growth rate for 304 stainless steels at 594 °C (1100 °F) with differing specimen geometries. Source: Ref 27
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Published: 01 January 1996
Fig. 14 Creep crack growth rate for 1Cr-1Mo- 1 4 V steels with differing specimen sizes. SG, side grooved. Source: Ref 51
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Published: 01 December 2009
Fig. 8 Creep crack growth rate, da/dt , for aluminium AA2519 alloy. (a) As a function of K , the specimen BCH-1 was 6.25 mm thick, while the others were 25.4 mm thick. (b) The same data as in (a) except correlated to K / r c A q , where r c A is the instantaneous
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Creep crack growth rate as a function of applied stress-intensity factor fo...
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in Properties and Applications of Wrought Aluminum Alloys
> Properties and Selection of Aluminum Alloys
Published: 15 June 2019
Fig. 9 Creep crack growth rate as a function of applied stress-intensity factor for 2124-T851 and 2219-T851. Source: Ref 13
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Comparison of creep crack growth rates for aluminum-lithium alloy extrusion...
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in Aluminum-Lithium Alloys
> Properties and Selection: Nonferrous Alloys and Special-Purpose Materials
Published: 01 January 1990
Fig. 2 Comparison of creep crack growth rates for aluminum-lithium alloy extrusions with those for other aluminum alloys. Alloy 8090 contains 2.5% Li, 1.5% Cu, 1.0% Mg, 0.12% Zr, and a balance of aluminum. T-L, crack plane and growth directions parallel to extrusion direction; L-T, crack plane
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(a) Comparison of creep-fatigue crack growth rates with fatigue crack growt...
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in Elevated-Temperature Life Assessment for Turbine Components, Piping, and Tubing
> Failure Analysis and Prevention
Published: 01 January 2002
Fig. 39 (a) Comparison of creep-fatigue crack growth rates with fatigue crack growth plotted as a function of Δ K . (b) The effect of hold time estimated for engineering structures when the creep crack growth rate is plotted as a function of ( C t ) avg
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Comparison between creep and creep-fatigue crack growth data in terms of th...
Available to PurchasePublished: 01 January 1996
Fig. 18 Comparison between creep and creep-fatigue crack growth data in terms of the estimated ( C t )avg for 1.25Cr-0.5Mo steel at 538 °C (1000 °F). Source: Ref 59 , 60
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Typical loading waveforms used during creep-fatigue crack growth testing. S...
Available to PurchasePublished: 01 January 1996
Fig. 7 Typical loading waveforms used during creep-fatigue crack growth testing. Source: Ref 66
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Book Chapter
Elevated-Temperature Crack Growth
Available to PurchaseBook: Fatigue and Fracture
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002389
EISBN: 978-1-62708-193-1
... Abstract This article describes the concepts for characterizing and predicting elevated-temperature crack growth in structural materials. It discusses both creep and creep-fatigue crack growth and focuses mainly on creep crack growth tests that are carried out in accordance with ASTM E 1457...
Abstract
This article describes the concepts for characterizing and predicting elevated-temperature crack growth in structural materials. It discusses both creep and creep-fatigue crack growth and focuses mainly on creep crack growth tests that are carried out in accordance with ASTM E 1457. The article provides information on typical test procedures and equipment used for these tests. It concludes with information on crack growth correlations.
Book: Fatigue and Fracture
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002390
EISBN: 978-1-62708-193-1
... rate behavior and those essential elements in making spectrum crack growth life prediction. It provides information on life assessment for bulk creep damage. crack growth rate creep damage high temperature life assessment spectrum life prediction CURRENT FRACTURE MECHANICS theory treats...
Abstract
The approaches to spectrum life prediction in components can be classified into two types, namely, history-based methods, using the life-fraction rule or other damage rules, and postservice evaluation methods. This article discusses the variables affecting the material crack growth rate behavior and those essential elements in making spectrum crack growth life prediction. It provides information on life assessment for bulk creep damage.
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005411
EISBN: 978-1-62708-196-2
... elastic fracture mechanics (LEFM), which is unable to explicitly account for the effects of creep deformation that may play a significant role in determining the crack growth behavior and its interaction with microstructure and environment. Figure 1 shows a schematic of a comprehensive methodology...
Abstract
The overarching goal of life-prediction research is to develop models for the various types of time dependencies in the crack-tip damage accumulation that occur in materials subjected to elevated temperatures. This article focuses on describing the models based on creep, oxidation kinetics, evolution of crack-tip stress fields due to creep, oxygen ingress, and change in the microstructure. It also provides a summary of creep-fatigue modeling approaches.
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Published: 01 January 1996
Fig. 17 Correlation of measured crack growth rates with the C t calculated from experimental measurements ( Ref 61 ) for 2.25Cr-1.0Mo steel at 594 °C (1100 °F). (Note da / dt versus C t plotted for the creep crack growth data and ( da / dt ) avg with ( C t ) avg for the creep
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Book Chapter
Creep and Stress Rupture Failures
Available to PurchaseSeries: 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...
Abstract
This article reviews the applied aspects of creep and stress-rupture failures. It discusses the microstructural changes and bulk mechanical behavior of classical and nonclassical creep behavior. The article provides a description of microstructural changes and damage from creep deformation, including stress-rupture fractures. It also describes metallurgical instabilities, such as aging and carbide reactions, and evaluates the complex effects of creep-fatigue interaction. The article concludes with a discussion on thermal fatigue and creep fatigue failures.
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