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stable crack propagation

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Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002400
EISBN: 978-1-62708-193-1
... stress on the cantilever bend specimen shown in Fig. 5 as determined by finite element modeling. Courtesy of K.A. Erven Fig. 8 Fatigue fracture in gas-carburized and modified 4320 steel. (a) Overview of initiation, stable crack propagation, and unstable crack propagation. (b) Same area...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003312
EISBN: 978-1-62708-176-4
... in situ crack length during stable crack propagation. ASTM E 1820 ( Ref 16 ) was developed, and is appropriate, for measuring plane strain fracture toughness in ductile metals but does not necessarily address the unique aspects of brittle solids. In addition, test specimens are rather large...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003311
EISBN: 978-1-62708-176-4
... mechanics tests. It is loaded in tension, but the primary stress is due to bending because the load line is offset from the crack front ( Fig. 7b ). Relatively stable crack propagation is possible with the CT specimen if a stiff testing machine is used. Also, a variant of the CT can be used in a wedge...
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
... fracture in gas-carburized and modified 4320 steel showing overview of initiation, stable crack propagation, and unstable crack propagation, with extent of stable crack indicated by dashed line This type of IG fracture is caused by the presence of well-defined second-phase precipitates at the grain...
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
... the deformation and failure of materials under cyclic loading conditions. However, in the ceramics literature, the expression static fatigue refers to stable crack propagation under sustained loads in the presence of an embrittling environment (which is commonly known as stress-corrosion crack growth...
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
... of the unstable fracture is identified by the dashed line in Fig. 8 . Fig. 8 Fatigue fracture in gas-carburized and modified 4320 steel showing overview of initiation, stable crack propagation, and unstable crack propagation, with extent of stable crack indicated by dashed line The fundamental...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003635
EISBN: 978-1-62708-182-5
.... , Fracture Mechanics Method for Determining Crack- Propagation Resistance of Embrittled Aluminum Bicrystals , J. Test. Eval. , Vol 3 , 1975 , p 173 – 178 10.1520/JTE10649J 30. Kamdar M.H. , in Embrittlement by Liquid and Solid Metals , Kamdar M.H. , Ed., TMS , 1984 p 149 – 159...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002355
EISBN: 978-1-62708-193-1
... on the size of the largest crack that cannot propagate below the fatigue limit. The latter definition gives considerably larger cracks at the end of nucleation than the former definition. In a way, the transition from microstructurally small cracks to physically small cracks is well compatible with the latter...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003310
EISBN: 978-1-62708-176-4
... for crack propagation. Hence, in any mechanical test the energy measured to propagate a crack consists of the surface energy of the crack, energy of plastic deformation at the crack tip, and energy of inelastic deformation of the entire specimen ( Ref 3 ). Because the latter two forms of energy absorption...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002384
EISBN: 978-1-62708-193-1
... of the conditions for stable and unstable fracture and crack arrest Fig. 6 Examples of stress concentrations in welded joints Fig. 7 Fatigue cracking from the weld root Fig. 8 Geometry parameters that affect weld toe stress concentration. r , weld toe root radius; θ, weld angle; L...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002393
EISBN: 978-1-62708-193-1
... , Vol 13 , p 9 – 14 12. “Standard Test Method for Constant-Load-Amplitude Fatigue Crack Growth Rates Above 10 −8 M/cycle,” ASTM E 647-81 13. Walker E.K. , “The Effect of Stress Ratio during Crack Propagation and Fatigue for 2024-T3 and 7075-T6,” The Effects of Environment...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003058
EISBN: 978-1-62708-200-6
... the principal fracture plane. At the point of crack branching, one of the deviations becomes large enough to nucleate a second crack, which begins to propagate in a stable fashion. In a qualitative sense, the formation of the instability is clearly associated with high crack velocity that accompanies a higher...
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
.... , and Jayaraman N. , A Study of Fatigue Damage Mechanisms in Waspaloy from 25°C–800°C , Mater. Sci. Eng. , 1984 , p 151 – 165 8. Diederich D. , Lerch B. , and Antolovich S.D. , Observations of Low Cycle Fatigue and Fatigue Crack Propagation Substructures of Waspaloy , Proc. VIII...
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
... 72Ni-28Fe alloy. RA, reduction in area. Source: Ref 4 Fig. 16 Effect of hydrogen on the threshold stress intensity for crack propagation, normalized against the hydrogen-free values. Ref 27 Fig. 17 Effect of the degree of order on the embrittlement susceptibility of Ni 2 Cr...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002380
EISBN: 978-1-62708-193-1
.... , Unstable Crack Propagation in Metals: Cleavage and Fast Fracture , Proc. Cranfield Crack Propagation Symposium , Vol 1 , Paper 84, 1961 6. “Standard Method for Plane-Strain Fracture Toughness of Metallic Materials,” E 399, Annual Book of ASTM Standards , Vol 03.01 , ASTM 7. “Standard...
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
... to Combat Crack Propagation in SSTG Upper Casing ,” Westinghouse Electric Corp. , unpublished research, 1984 28. Saxena A. , Liaw P.K. , Logsdon W.A. , and Hulina V.E. , Residual Life Prediction and Retirement for Cause Criteria for SSTG Casings, Part II: Fracture Mechanics...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003142
EISBN: 978-1-62708-199-3
...Abstract Abstract This article discusses corrosion resistance of titanium and titanium alloys to different types of corrosion, including galvanic corrosion, crevice corrosion, stress-corrosion cracking (SCC), erosion-corrosion, cavitation, hot salt corrosion, accelerated crack propagation...
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
... alloys Chloride Hydride Aluminum alloys, steels Various media Near-surface hydrogen Fig. 4 Schematic of crack tip processes that may be the rate-determining step in environmentally assisted crack propagation Fig. 7 Relationship between stress amplitude and minimum depth...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003318
EISBN: 978-1-62708-176-4
... on the tacit assumption that structural components are intrinsically flawed and capable of sustaining a considerable amount of stable crack growth before failure. The fatigue life of a component based on this defect-tolerant approach is dictated by the number of loading cycles needed to propagate a crack...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
... divided into three parts: Crack initiation Stable progressive crack propagation Final (fast) fracture Design and testing aspects of fatigue are discussed in more detail elsewhere, such as in Fatigue and Fracture , Volume 19 of ASM Handbook and Mechanical Testing and Evaluation...