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subcritical crack growth

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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...
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: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003633
EISBN: 978-1-62708-182-5
.... Similarly, yield strength effects are considered in the section “ Mechanical Factors ” in this article. Metallurgical factors in hydrogen-induced subcritical crack growth, such as crystal structure, hydride stability, and yield strength, are considered in the article “Hydrogen Damage” in this Volume...
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
... with no observable change in the flow characteristics of the structural metal, as subcritical crack growth or as delayed failure under static load. For any given combination of structural metal and embrittling metal, there exist temperatures below and above which there is no embrittlement. The low-temperature...
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
... can be constructed. In any analysis, understanding of crack growth behavior is also required (see the section “Subcritical Crack Growth” in this article). The main reason for using the stress intensity approach in failure control is that the equations relate crack size to the operating stress...
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
... with that of similar-strength steel and aluminum alloys. Source: Ref 17 , 18 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...
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.a0002385
EISBN: 978-1-62708-193-1
... precise control of fatigue precracking and environment. The subcritical crack growth of the failed component is unlikely to lie within the ASTM envelope, so the effective K Ic value of the failure can be different from the ASTM value. Finally, large errors can arise if the failure was in an atypical...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002476
EISBN: 978-1-62708-194-8
..., creep, stress corrosion, and cyclic fatigue. Stress corrosion and cyclic fatigue result in a phenomenon called subcritical crack growth (SCG). This failure mechanism initiates at a preexisting flaw and continues until a critical length is attained. At that point, the crack grows in an unstable fashion...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003667
EISBN: 978-1-62708-182-5
... and geometrical factors, such as root radius, in a given environment in order to maintain the effective applied stress intensity at a level below the threshold for subcritical crack growth. Although methodology for measuring K ISCC is gradually being standardized, its significance in design is not yet...
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
..., the potential for initiation of crack propagation must be considered an integral part of the design process, and the subcritical crack growth characteristics under monotonic, sustained, and cyclic loads must be incorporated in the design. The final instability parameter, such as plane strain fracture toughness...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003309
EISBN: 978-1-62708-176-4
... ENVIRONMENTALLY ASSISTED CRACK GROWTH is a special form of mechanical degradation that occurs when the combined effect (or interaction) of environment and applied or residual stresses causes subcritical crack growth or fracture. Materials ranging from metals and alloys to glasses, plastics, composites...
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
... investigating a design and doing a life assessment. Stress intensity is the controlling factor in subcritical crack growth propagation rates and the identification of the critical crack size for the onset of rapid overload (critical fracture). Stress and crack geometry are parameters that determine...
Book Chapter

By Bruce Craig
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003634
EISBN: 978-1-62708-182-5
... as a function of time of exposure to hydrogen at 427 °C (800 °F) and 6.2 MPa (900 psi) partial pressure. Source: Ref 10 Fig. 22 Ductile-to-brittle transitions in hydrided zirconium. Source: Ref 35 Fig. 18 Effect of humidity on subcritical crack growth of high-strength aluminum alloys...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... of fracture mechanics. The fracture mechanics approach is an important part of stress analysis at the tips of sharp cracks or discontinuities. The article reviews fracture mechanics concepts, including linear elastic fracture mechanics, elastic-plastic fracture mechanics, and subcritical fracture mechanics...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... elastic fracture mechanics analysis, with some mention of elastic-plastic fracture mechanics analysis. The article describes the probabilistic aspects of fatigue and fracture. Information on crack-growth simulation of the material is also provided. crack-growth simulation elastic-plastic fracture...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002349
EISBN: 978-1-62708-193-1
... stress and crack length, showing regions and types of crack growth. (a) Linear-elastic. (b) Elastic-plastic. (c) Subcritical Fig. 3 Influence of crack length on gross failure stress for center-cracked plate. (a) Steel plate, 36 in. wide, 0.14 in. thick, room temperature, 4330 M steel...