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subcritical crack growth

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Published: 01 January 1996
Fig. 6 Example of subcritical crack growth plot for fatigue crack growth of a surface crack in quenched-and-tempered steel More
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Published: 01 January 2003
Fig. 18 Effect of humidity on subcritical crack growth of high-strength aluminum alloys in hydrogen gas. Source: Ref 29 More
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Published: 01 January 1996
Fig. 9 Subcritical crack growth behavior in MgO-PSZ showing a comparison of cyclic crack velocities, da / dt , from the present study with sustained-load cracking data of Becher for 55% relative humidity air and distilled water. Note how fatigue-induced crack growth is much faster than More
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002409
EISBN: 978-1-62708-193-1
... Abstract This article summarizes the metallurgical and environmental variables that affect fracture toughness, fatigue life, and subcritical crack growth of titanium alloys, such as chemistry, microstructure, texture, environment, and loading. The classes of titanium alloys considered...
Series: ASM Handbook
Volume: 2B
Publisher: ASM International
Published: 15 June 2019
DOI: 10.31399/asm.hb.v02b.a0006548
EISBN: 978-1-62708-210-5
... published industry sources is given for a wide range of the properties and performance characteristics for topics such as: physical and thermophysical properties, typical and minimum mechanical properties, fatigue resistance, fracture resistance, and subcritical crack growth. cast aluminum alloys...
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Published: 01 January 2006
Fig. 2 Sequence of crack initiation, coalescence, and growth during subcritical cracking in aqueous environments. Note that “engineering initiation” corresponds to crack dimensions equal to crack detection capabilities, i.e., function of crack resolution and probability of detection. Source More
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Published: 30 August 2021
Fig. 24 Illustration of the three stages of subcritical fatigue crack growth. Adapted from Ref 16 More
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Published: 01 January 2002
Fig. 8 Failure evaluation of a cracked gate valve stem determined that no subcritical crack growth had occurred from the forging defect. Therefore, similar gate valve stems could remain in service with a periodic inspection. (a) Cracked gate valve stem. 1×. (b) Forging defect in the radius. 50 More
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Published: 30 August 2021
Fig. 8 Failure evaluation of a cracked gate valve stem determined that no subcritical crack growth had occurred due to a forging defect. Therefore, similar gate valve stems could remain in service with a periodic inspection. (a) Cracked gate valve stem. Original magnification: 1×. (b) Forging More
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Published: 01 January 2003
) Fracture surface produced by rapid subcritical crack growth (∼1 mm/s, or 0.4 in./s) in a Cu-1.9Be alloy in liquid mercury at 20 °C (70 °F) showing predominantly dimpled intercrystalline fracture. (c) Macrograph of a cadmium-plated fastener made from 1040 steel. Aerodynamic heating during descent More
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003633
EISBN: 978-1-62708-182-5
...). A decrease in pH from 9 to 6 at potential of −0.2 V, which shifts iron from a region of stability to one of active corrosion, is indicated by the solid bar. For materials in which SCC occurs by a hydrogen-induced subcritical crack growth mechanism, the thermodynamic requirement for crack growth...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
... of the situation. Furthermore, those cases where such embrittlement extends below the melting temperature of the embrittling metal, formerly known as stress alloying, are now termed solid metal induced embrittlement (SMIE). In either case, the metal-induced embrittlement is the result of subcritical crack growth...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003317
EISBN: 978-1-62708-176-4
... Abstract Testing and characterization of fatigue crack growth are used extensively to predict the rate at which subcritical cracks grow due to fatigue loading. ASTM standard E 647 is the accepted guideline for fatigue crack growth testing (FCGR) and is applicable to a wide variety of materials...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... Abstract Engineered components fail predominantly in four major ways: fracture, corrosion, wear, and undesirable deformation (i.e., distortion). Typical fracture mechanisms feature rapid crack growth by ductile or brittle cracking; more progressive (subcritical) forms involve crack growth...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006786
EISBN: 978-1-62708-295-2
..., are now termed solid-metal-induced embrittlement (SMIE). In either case, the metal-induced embrittlement is the result of subcritical crack growth in the structural metal, when it is stressed in tension in the presence of a specific lower-melting-point metal or alloy. Metal-induced embrittlement has...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002386
EISBN: 978-1-62708-193-1
... in the article “Residual Strength of Metal Structures” in this Volume, any analysis of damage tolerance requires information on both subcritical crack growth rates and the residual strength for a maximum permissible crack size ( a p ). A crack smaller than a p may in fact be unacceptable if subcritical...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002385
EISBN: 978-1-62708-193-1
... be machined to ensure that the crack growth plane and direction are the same as those of the failure. The investigator must also recognize that the ASTM procedure requires precise control of fatigue precracking and environment. The subcritical crack growth of the failed component is unlikely to lie within...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002417
EISBN: 978-1-62708-193-1
... are known to be susceptible to subcritical crack growth in monotonic tension under the influence of an environment. This stress corrosion or static fatigue process has been studied extensively in a wide variety of glasses, oxide ceramics, transformation-toughened ceramics, and other brittle materials...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003319
EISBN: 978-1-62708-176-4
... in inherent and induced flaws to a critical size ( Ref 1 , 2 , 3 , 4 , 5 , 6 , and 7 ). Cyclic loading is not required to generate crack extension. Hence, the phenomenon is referred to as “static fatigue.” The phenomenon is also referred to as subcritical crack growth, stress corrosion, delayed failure...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002348
EISBN: 978-1-62708-193-1
... in either the initial product release or field inspection practices. Therefore, it couples directly to nondestructive inspection (NDI) and evaluation (NDE). In addition, the potential for initiation of crack propagation must be considered an integral part of the design process, and the subcritical crack...