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Book Chapter
Mode III Fatigue Crack Growth Following the Curvature of the Heat-Affected Zone of a Type 321 Stainless Steel Spot Weld
Available to PurchaseSeries: 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...
Abstract
Several AISI type 321 stainless steel welded oil tank assemblies used on helicopter engine systems began to leak in service. One failure, a fracture on the aft side of a spot weld, was submitted for analysis. SEM fractography examination revealed fatigue failure. The failure initiated at an overload fracture near the root of the weld and was followed by mode III fatigue crack propagation (tearing) around the periphery of the weld. The initial overload fracture was caused by a high external load, which produced a concentrated stress and fracture at the weld root. The subsequent fatigue fracture was caused by engine vibrations during operation of the aircraft. Fracture characteristics indicated that the fatigue would not have occurred if the initial damage had not taken place.
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(a) Comparison of creep-fatigue crack growth rates with fatigue crack growt...
Available to Purchase
in Elevated-Temperature Life Assessment for Turbine Components, Piping, and Tubing
> Failure Analysis and Prevention
Published: 01 January 2002
Fig. 39 (a) Comparison of creep-fatigue crack growth rates with fatigue crack growth plotted as a function of Δ K . (b) The effect of hold time estimated for engineering structures when the creep crack growth rate is plotted as a function of ( C t ) avg
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Published: 01 January 2002
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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
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Published: 01 January 2002
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Published: 01 January 2002
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Room-temperature fatigue-crack-growth behavior of ASTM grade A293 steel. Le...
Available to PurchasePublished: 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.
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Effect of hold time on the fatigue crack growth rate properties of 2.25Cr-1...
Available to Purchase
in Thermomechanical Fatigue: Mechanisms and Practical Life Analysis
> Failure Analysis and Prevention
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
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Variation of the fatigue crack growth rate as a function of temperature. (a...
Available to Purchase
in Elevated-Temperature Life Assessment for Turbine Components, Piping, and Tubing
> Failure Analysis and Prevention
Published: 01 January 2002
Fig. 3 Variation of the fatigue crack growth rate as a function of temperature. (a) Temperature effect on fatigue crack threshold and growth rates. (b) Variation of fatigue crack growth rates at Δ K of 30 MPa m (27 ksi in. )
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Cases of environmental effects on fatigue crack growth. (a) True corrosion ...
Available to PurchasePublished: 01 January 2002
Fig. 24 Cases of environmental effects on fatigue crack growth. (a) True corrosion fatigue. (b) Stress-corrosion fatigue. (c) Stress-corrosion fatigue on true corrosion fatigue
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Concentric ring appearance, typical of fatigue crack growth, emanating from...
Available to PurchasePublished: 01 December 1992
Fig. 3 Concentric ring appearance, typical of fatigue crack growth, emanating from the pits along the bottom edge of the main rotor blade adjacent to the set-back for the fiberglass pockets.
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Log-log da/dN versus delta K fatigue crack growth-rate test results for 310...
Available to Purchase
in Brittle Fracture of the Tension Flange of a Steel Box-Girder Bridge
> Handbook of Case Histories in Failure Analysis
Published: 01 December 1992
Fig. 18 Log-log da/dN versus delta K fatigue crack growth-rate test results for 310 MPa (45 ksi) maximum stress and stress ratio of 0.73. The scatterband (two parallel lines) is for quenched and tempered martensitic steels from NCHRP 12–14. Note that the A517 grade, F, plate D, test results
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Illustration of the three stages of subcritical fatigue crack growth. Adapt...
Available to PurchasePublished: 30 August 2021
Fig. 24 Illustration of the three stages of subcritical fatigue crack growth. Adapted from Ref 16
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in Service Lifetime Assessment of Polymeric Products
> Characterization and Failure Analysis of Plastics
Published: 15 May 2022
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in Material-Based Failure Analysis of a Helicopter Rotor Hub
> ASM Failure Analysis Case Histories: Air and Spacecraft
Published: 01 June 2019
Fig. 10 Functional dependence of ΔK eff, T on R. The fatigue crack growth data are from Wanhill and Looije. 9
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Fatigue crack growth started at O; arrows indicate direction. Magnification...
Available to PurchasePublished: 01 June 2019
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Fatigue crack growth in crankshaft shows beach marks. Chromium plating, abo...
Available to Purchase
in Failures in Airplane Engine Crankshafts
> ASM Failure Analysis Case Histories: Air and Spacecraft
Published: 01 June 2019
Fig. 4 Fatigue crack growth in crankshaft shows beach marks. Chromium plating, about 0.010 in. thick, is indicated by arrows
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Cases of environmental effects on fatigue crack growth. (a) True corrosion ...
Available to PurchasePublished: 15 January 2021
Fig. 24 Cases of environmental effects on fatigue crack growth. (a) True corrosion fatigue. (b) Stress-corrosion fatigue. (c) Stress-corrosion fatigue on true corrosion fatigue
More
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Published: 15 January 2021
Fig. 12 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 13
More
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Published: 15 January 2021
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