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fatigue crack growth rate testing

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Published: 01 March 2002
Fig. 12.38 Fatigue crack growth rate behavior of IN-718 nickel-base superalloy tested in air at 649 °C (1200 °F) More
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Published: 01 December 1989
Fig. 6.14. Fatigue-crack-growth rates in Cr-Mo-V steel tested at 0.017 Hz ( Ref 25 ). More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630257
EISBN: 978-1-62708-270-9
... with increasing yield strength and is related to the environmentally enhanced crack growth threshold, K IEAC , of the environment material system under consideration. This emphasizes the need to conduct fracture-toughness and fatigue-crack growth-rate tests in environments that may be encountered in actual...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 1983
DOI: 10.31399/asm.tb.mlt.t62860269
EISBN: 978-1-62708-348-5
... test temperatures. Figure 8.16 Effect of temperature on the fatigue crack growth rates of AISI 310S, an f.c.c. alloy. Figure 8.17 Normalized fatigue crack growth rate data for structural alloys. Figure 8.1 Fracture toughness transition in structural alloys. Figure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540215
EISBN: 978-1-62708-309-6
... (with no change in other proportions) is allowed. For fatigue crack growth rate tests, B can be in the range of W /20 to W /4. Fig. 5.7 Compact specimen configuration (pinhole diameter, 0.25 W ) For test data reported in the earlier literature, an older version of the K -equation (e.g...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540297
EISBN: 978-1-62708-309-6
... in ASTM Standard E 647 for measuring fatigue crack growth rate in metallics, except that precracking is extremely difficult. Again, test methods for da/dN and da/dt in ceramics are different than for metals (see Table 7.1 ). Typical da/dN data for ceramics are shown in Fig. 7.3 and 7.4...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780238
EISBN: 978-1-62708-281-5
... by fatigue cracks known to propagate at different rates, depending on the near-tip damage micromechanisms, mean stress, frequency, or test environment. These factors are of significant interest and practicality for the safe design of structural polymeric components subjected to repetitive loading...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490111
EISBN: 978-1-62708-340-9
.... Soc. Exp. Stress Anal. , Vol 14 ( No. 1 ), 1956 11. Skelton R.P. , High Strain Fatigue Testing at Elevated Temperature , Trans. Indian Inst. Metals , Vol 35 ( No. 6 ), Dec 1982 , p 519 - 534 12. Skelton R.P. , The Prediction of Crack Growth Rates From Total...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
... a term to account for the dissipation of energy due to the plastic deformation that occurs at the crack tip while under load. This is usually expressed as: (Eq 7.13) G c = 2 γ s + G p where G p is the plastic energy release rate per unit area of crack growth...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870201
EISBN: 978-1-62708-344-7
...) 3.0 2.0 0.635 (0.025) 2.0 2.0 Source: Ref 9.38 Fig. 9.23 Crack growth rate retardation pattern after an overload. Source: Ref 9.37 Fig. 9.24 Test section of notched fatigue specimen used by Manson and Hirschberg. Source: Ref 9.38 Fig. 9.25 Proposal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090341
EISBN: 978-1-62708-266-2
... subcritical crack growth, and the unloading rate in the proof test must be as rapid as possible to ensure that truncation of the strength distribution curve takes place. 14.4 Crack Growth Data Water-enhanced crack growth behavior has been determined for a wide variety of glasses and ceramics, ranging...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610303
EISBN: 978-1-62708-303-4
.... The chapter describes some of methods used to determine maximum permissible crack size and predict growth rates. It explains how the information can then be used to control fractures through periodic inspection, fail-safe features, mandated retirement, and proof testing. It presents a number of fracture...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610147
EISBN: 978-1-62708-303-4
... to crack propagation and how stress concentrations affect fatigue life. It also discusses fatigue life improvement methods and design approaches. fatigue crack growth rates fatigue crack initiation fatigue failures fatigue-life prediction high-cycle fatigue low-cycle fatigue FATIGUE...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240243
EISBN: 978-1-62708-251-8
... characterize the crack growth, it is then possible to estimate the service life or inspection intervals required under specific loading conditions and service environment. In the fracture mechanics approach to fatigue crack growth, the crack growth rate, or the amount of crack extension per loading cycle...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610209
EISBN: 978-1-62708-303-4
...) and transverse (long transverse-longitudinal, or TL) testing orientations, and particularly at higher Δ K levels. This is demonstrated for three other steel grades in Fig. 23 . These results indicate that cleanliness and loading orientation must be considered when using fatigue crack growth rate data...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610327
EISBN: 978-1-62708-303-4
... effect and behavior as metals, whether tested in room temperature air or in water. That is, the magnesia partially stabilized zirconia (Mg-PSZ) data in Fig. 10 shows that its fatigue crack growth rates are faster in moist air and much faster in water as compared to in inert nitrogen, resembling...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930163
EISBN: 978-1-62708-359-1
..., weld metals, and heat-affected zone (HAZ) microstructures. He found that there was no significant variation in crack-propagation rates among any of the materials tested. The upper-bound crack-growth rate constants for ferritic steels operating in nonaggressive environments are given by: (Eq 4) C...
Image
Published: 30 June 2023
Fig. 9.16 Fatigue crack growth testing and data analysis. (a) Crack length measurement, (b) calculation of crack growth rate, and (c) analysis of da/dN versus stress intensity range. More
Image
Published: 01 November 2012
Fig. 58 Influence of texture on fatigue crack growth in Ti-6Al-4V. Fatigue crack growth rates are higher when basal planes are loaded in tension. The elastic modulus in tension for the basal texture (B) is 109 GPa (15.8 × 10 6 psi); for the transverse texture (T), 126 GPa (18.3 × 10 6 psi More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870099
EISBN: 978-1-62708-299-0
... of fracture mechanics techniques capable of determining crack growth rates, such tests continue to be the basic tools used in evaluating resistance of aluminum alloys to SCC. These tests suggest a minimum (threshold) stress that is required for cracking to develop. Fig. 4 The relative resistance...