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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001028
EISBN: 978-1-62708-214-3
... indicating mode I fatigue crack progression from the top surface, apparently due to reverse bending of the sheet. (a) 385×. (b) 1925×. After the crack was opened, examination near the crack front showed that the direction of the crack growth in the lower zone was upward and outward, indicated...
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Published: 01 January 2002
Fig. 10 River lines on a cleavage fracture surface. Direction of growth is parallel to the direction of crack coalescence as indicated by the arrow. Cracks must reinitiate at a boundary containing a twist (mode III) deformation component. More
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Published: 01 January 2002
Fig. 30 Schematic of a river pattern. Crack growth is in the direction of crack coalescence. River patterns may be visible at the macroscale in organic glasses and brittle polymers but are visible only at the microscale in metallic materials. Source: Ref 11 More
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Published: 01 January 2002
Fig. 42 Fully pearlitic steel fatigue fracture surfaces. Crack growth direction is from left to right in both images. (a) Intermediate crack growth rate (∼0.1 ∼m/cycle), and (b) low crack growth rate (∼0.001 ∼m/cycle). No fatigue striations were resolved by SEM at any crack growth rate More
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Published: 01 January 2002
Fig. 45 Isolated cleavage facet within progressive high-growth-rate fatigue fracture of fully pearlitic steel, as viewed in the SEM More
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Published: 01 January 2002
Fig. 6 Schematic illustration of variation of fatigue-crack-growth rate, da / dN , with alternating stress intensity, Δ K , in steels, showing regions of primary crack-growth mechanisms. Source: Ref 5 More
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Published: 01 January 2002
Fig. 7 Pearson plot of crack-growth rate as a function of K for short surface cracks and through-cracks. Source: Ref 6 More
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Published: 01 January 2002
Fig. 8 Summary of fatigue-crack-growth data for martensitic steels. Source: Ref 9 More
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Published: 01 January 2002
Fig. 9 Summary of fatigue-crack-growth data for ferrite-pearlite steels. Source: Ref 9 More
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Published: 01 January 2002
Fig. 10 Room-temperature fatigue-crack-growth behavior of ASTM grade A293 steel. Levels of R represent spectrum of typical in-service load history. More
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Published: 01 January 2002
Fig. 9 Power-law dependence of creep crack growth with K in less ductile materials. Source: Ref 11 More
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Published: 01 January 2002
Fig. 13 Effect of hold time on the fatigue crack growth rate properties of 2.25Cr-1Mo cast steel. The 2 h hold time tests were performed in steam at 538 °C (100 °F). Source: Ref 13 More
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Published: 01 January 2002
Fig. 4 Stress-corrosion crack growth. (a) Schematic diagram of typical crack-propagation rate as a function of crack-tip stress-intensity behavior illustrating the regions of stage 1, 2, and 3 crack propagation as well as identifying the plateau velocity and the threshold stress intensity. (b More
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Published: 01 January 2002
Fig. 1 The pH and oxidation reduction potential for growth of anaerobic bacteria able to reduce nitrate or sulfate (dots in plots) and for soils dominated by the microbial metabolism (boxes). Aerobic bacteria grow over a wide range of pH at E h > 300 mV (normal hydrogen electrode More
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Published: 01 June 2019
Fig. 8 Fatigue crack growth rates through the segregated region compared to known growth rate values. More
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Published: 01 January 2002
Fig. 6 TEM fractograph showing fatigue-crack growth striations. 39,000× More
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Published: 01 January 2002
Fig. 10 Schematic of crack-growth stages. More
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Published: 01 January 2002
Fig. 19 Graph showing the influence of load on the LME crack-growth rate for the experimental conditions described in text. Copper-free tensile strength at 1100 °C (2010 °F), % More
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Published: 01 January 2002
Fig. 11 The measured crack growth rate (crack length versus time) determined by optical measurements or fractographic evaluation used to validate life prediction estimates. In this example, for an aircraft wing, the predicted crack growth and the actual crack growth based on measured crack More
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Published: 01 January 2002
Fig. 13 Crack growth rate data for 2024-T3 aluminum at R = 0 ( example 2 ). Source: Ref 33 More