The effect of crack length and maximum stress on the fatigue crack growth rates of engineering alloys

Amsterdam, Emiel; Wiegman, Jan Willem E.; Nawijn, Marco; Hosson, J.T.M. de

doi:10.1016/j.ijfatigue.2022.106919

Cited by 12 publications

(23 citation statements)

References 83 publications

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“…Hence very similar FCgr, and Paris law expo-nents were measured. It was reported that the resulting FCgr curves show specific changes in the location of transition points and adjacent slopes for changes in alloy composition and heat treatments for various materials [20]. For Al-alloy / SiC p [12,[21][22] at low ΔK th levels, there is a strong tendency for crack arrest and deflection around the reinforcement particles.…”

Section: Resultsmentioning

confidence: 99%

Influence of Particle Sizes and Volume Fractions on Fatigue Crack Growth Rates of Aerospace Al-Alloys Composites

Uygur

2024

Archives of Metallurgy and Materials

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Recently, the need to develop fuel efficient transport systems has led to the development of a range of materials of low density, high stiffness and high strength each can be made at a reasonable cost. The aluminium based alloys are particularly important because of their improved mechanical, physical and technical properties. Fatigue failures have been recognised since the early days of the industrial revolution. Fatigue response of most of materials is related with the microstructural variations in the structure. Hence, in this study, influence of particle size and volume fractions on fatigue properties of Al-alloy composites was investigated. It was found that particle size and volume fraction of reinforcement particles play significant role on fatigue propagation rates, stress intensity threshold values, crack tip opening distance and crack tip plastic zone sizes.

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Section: Resultsmentioning

confidence: 99%

Influence of Particle Sizes and Volume Fractions on Fatigue Crack Growth Rates of Aerospace Al-Alloys Composites

Uygur

2024

Archives of Metallurgy and Materials

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“…The Δ K th is usually defined as the Δ K when the FCGR is 10 −7 mm/cycle. In the second stage, the fatigue crack grows as the Δ K > Δ K th , and this is the stable FCG, where the FCGR and Δ K obey the Paris equation [ 25 ]:

where, a is the crack size, N is the cycle, C and m are constants affected by temperature, humidity, medium, loading frequency, and so on. In the third stage, the FCGR will increase rapidly, and the FCG will enter the unstable growth stage until the final fracture.…”

Section: Resultsmentioning

confidence: 99%

“…The ΔKth is usually defined as the ΔK when the FCGR is 10 −7 mm/cycle. In the second stage, the fatigue crack grows as the ΔK > ΔKth, and this is the stable FCG, where the FCGR and ΔK obey the Paris equation [25]:…”

Section: Fatigue Crack Growth Ratementioning

confidence: 99%

Superior Comprehensive Mechanical Properties of a Low-Carbon Medium Manganese Steel for Replacing AISI 4330 Steel in the Oil and Gas Industry

et al. 2023

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A low-carbon medium manganese steel (0.12C-3.13Mn) containing Cr, Ni, Mo, V, and Cu elements was designed to replace the AISI 4330 steel applied in the oil and gas industry. The mechanical properties, microstructures, and fatigue crack growth rate were comparatively analyzed using uniaxial tension tests, microstructure characterization, and compact tension with fatigue crack growth characterization. The results showed that the ductility and −40 °C impact energy of 0.12C-3.13Mn steel were better than AISI 4330 steel (from 115 J to 179 J), while the yield strength of 957 MPa of the former was lower than the latter of 1060 MPa after being subjected to the same tempering process. The microstructure of 0.12C-3.13Mn steel was composed of a mixture of tempered martensite, reversed austenite, and nanosized precipitation particles, while the microstructure of S4330 steel contained ferrite and large-size Fe3C with lath and near-spherical morphologies. Compared to Cr-rich Fe3C, (V, Mo)C and Cu-rich particles have smaller sizes and, thus, provide more strengthening increment, leading to a higher yield ratio. The impressive fatigue-resistance property was obtained in 0.12C-3.13Mn steel because the threshold value was 5.23 MPa*m1/2 compared to the value of 4.88 MPa*m1/2 for S4330 steel. Even if the fatigue crack grew, the stress intensity factor range of 0.12C-3.13Mn steel was obviously wider than that of AISI 4330 steel due to the presence of reversed austenite and secondary cracks. Overall, the AISI 4330 steel could be replaced with the designed 0.12C-3.13Mn steel due to the similar strength and better ductility, low-temperature toughness, and fatigue-resistance property.

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“…During constant amplitude FCGR tests the only parameter that influences the FCGR during the test is the crack length. Since exact reconstruction of the a-N curve is possible for FCGR tests with a constant range of stress, the influence of the crack length on the FCGR has been fully characterised [60]. To characterise the influence of the remaining test parameters, a total of 61 middle tension (M(T)) specimens of 7075-T7351 were tested in constant amplitude tension-tension loading with a variety of minimum and maximum stresses, which resulted in 13 different stress ratios ranging from R = 0.01 to R = 0.77.…”

Section: Methodsmentioning

confidence: 99%

On the strain energy release rate and fatigue crack growth rate in metallic alloys

Amsterdam¹,

Wiegman²,

Nawijn³

et al. 2023

Engineering Fracture Mechanics

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The effect of crack length and maximum stress on the fatigue crack growth rates of engineering alloys

Cited by 12 publications

References 83 publications

Influence of Particle Sizes and Volume Fractions on Fatigue Crack Growth Rates of Aerospace Al-Alloys Composites

Influence of Particle Sizes and Volume Fractions on Fatigue Crack Growth Rates of Aerospace Al-Alloys Composites

Superior Comprehensive Mechanical Properties of a Low-Carbon Medium Manganese Steel for Replacing AISI 4330 Steel in the Oil and Gas Industry

On the strain energy release rate and fatigue crack growth rate in metallic alloys

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