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fatigue crack initiation

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540379
EISBN: 978-1-62708-309-6
... Abstract This appendix presents an analytical model that estimates damage rates for both crack initiation and propagation mechanisms. The model provides a nonarbitrary definition of fatigue crack initiation length, which serves as an analytical link between initiation and propagation analyses...
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Published: 01 January 2015
Fig. 21.19 Fatigue crack initiation in carburized coarse-grained 8620 steel (a) quenched directly from carburizing at 927 °C (1700 °F) and (b) reheated after carburizing to 788 °C (1450 °F). Both specimens tempered at 145 °C (300 °F). Scanning electron micrographs. Source: Ref 21.31 More
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Published: 01 December 2015
Fig. 17 Section showing fretting damage and fatigue crack initiation in 0.2% C steel. Courtesy of R.B. Waterhouse, University of Nottingham More
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Published: 01 December 2003
Fig. 12 Fatigue-crack initiation in polystyrene from a V-notch. Note crazes surrounding and preceding the crack. 37× More
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Published: 01 August 2005
Fig. A4.3 Comparison of fatigue crack initiation test data and LOOPIN 8 prediction using the uncut spectra. Source: Ref A4.6 More
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Published: 01 August 2005
Fig. A4.4 Comparison of fatigue crack initiation test data and LOOPIN 8 prediction using the post -RACETRAK spectra (DMIN = 0.25). Source: Ref A4.6 More
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Published: 01 August 2005
Fig. A4.5 Comparison of fatigue crack initiation test data and LOOPIN 8 prediction using the post -RACETRAK spectra (DMIN = 0.50). Source: Ref A4.6 More
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Published: 01 September 2008
Fig. 70 Model of fatigue crack initiation due to the presence of inclusions in a nonmartensitic (decarburized) steel layer. Source: Ref 122 More
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Published: 01 September 2008
Fig. 9 Location of fatigue crack initiation on nitrided 40HM (4140)-grade steel. Original magnification: 100× More
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Published: 01 July 1997
Fig. 2 Conceptual drawing of fatigue crack initiation and growth at the toe of (left) a “Nominal” groove welded butt joint having a substantial (⋍0.1 in. depth) weld discontinuity (slag entrapment) at the root of the critical notch (weld toe) and (right) an “Ideal” weldment with good wetting More
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Published: 01 November 2012
Fig. 28 Development of extrusions and intrusions during fatigue crack initiation. Source: Ref 8 More
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Published: 01 October 2005
Fig. 2.20 Sketch illustrating piston head misalignment, fatigue crack initiation, and propagation. A, region of misalignment; B, sharp corner of piston ring groove; B-C, fatigue crack; and C-D, sudden overload failure More
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Published: 01 July 2009
Fig. 10.9 Histogram showing fractional fatigue crack-initiation life used to date of existing disks More
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Published: 01 March 2006
Fig. 10.28 Fatigue crack initiation at a surface inclusion in 2024-T4 aluminum after 5% of total fatigue life. Source: Ref 10.24 More
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Published: 01 December 1999
Fig. 6.39 Composite shear stress range gradient. Fatigue-crack initiation in carburized and hardened gears controlled by the 45 shear stress in zones I and III and by the orthogonal shear stress in zone II. P 0 , maximum pressure at the surface; b, half the contact width. Source: Ref 53 More
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Published: 01 December 1999
Fig. 7.14 Variation of fatigue-crack initiation lives with residual stress at the notch of tested steels. Source: Ref 27 More
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Published: 01 September 2005
Fig. 10 Intergranular bending fatigue crack initiation at the surface of a gas-carburized and direct-cooled SAE 8719 steel specimen. Source: Ref 20 More
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Published: 01 September 2005
Fig. 20 Bending fatigue crack initiation in gas-carburized and reheated 4320 steel. The dashed line corresponds to maximum depth of surface oxidation, and all fracture below dashed line is transgranular. Source: Ref 28 More
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Published: 01 December 1999
Fig. 3.17 Variation of fatigue-crack initiation lives with residual stress at the notch of tested steels. Surface carbon: 0.95 to 1.05%. Hardness 750 to 780 HV. Crack initiation, 5 μm crack at the notch. Source: Ref 25 Steel Carbides Retained austenite Vol% Diameter, μm Spacing More
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Published: 01 October 2011
Fig. 16.24 Fatigue failure surface from a piston rod. The fatigue crack initiated near a forging flake at the center and propagated slowly outward. The outer area is the region of final brittle fracture overload. Source: Ref 16.5 More