Critical assessment of the fatigue crack growth rate sensitivity to material microstructure in ferrite-pearlite steels in air and marine environment

Igwemezie, Victor; Dirisu, Philip; Mehmanparast, Ali

doi:10.1016/j.msea.2019.03.093

Cited by 35 publications

(18 citation statements)

References 43 publications

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“…The experimental methods have been discussed in full elsewhere. 23,39,43 The results of that study, for FCGR tests in air, are shown in Figure 7. Shown also are the typical microstructures of the J2N and TMCP (G10 and G8) steels examined.…”

Section: Fcgrs In Nr and Tmcp S355 Steels In Airmentioning

confidence: 99%

“…40 They are marine steels having low carbon contents with the microstructures consisting of small volume fraction of P in α matrix. 39 Figure 3 shows the phase morphologies of the J2N microstructure.…”

Section: Experimental Materials and Test Conditionsmentioning

confidence: 99%

“…The test set-up, loading conditions, crack growth monitoring, estimation and FCGR calculations are presented in detail in other studies. 23,39,43…”

Section: Experimental Materials and Test Conditionsmentioning

confidence: 99%

“…The details of the experimental procedures have been discussed elsewhere. 23,39,43 The experimental results are shown in Figure 16. Three corrosion fatigue crack growth rate (CFCGR) curves, obtained at 12 kN, 9 kN and under 0.3 Hz for the J2N studied by Adedipe et al, 51 were plotted from the data extracted from a versus N curves.…”

Section: Fcgrs In Nr and Tmcp S35steels In Swmentioning

confidence: 99%

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The influence of microstructure on the fatigue crack growth rate in marine steels in the Paris Region

Igwemezie

2020

Fatigue Fract Eng Mat Struct

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This paper presents a study on the effect of microstructure on the fatigue crack growth (FCG) rate in advanced S355 marine steels in the Paris Region of the da/dN versus ΔK log–log plot. The environments of study were air and seawater (SW), under constant amplitude sinewave fatigue loading. Fundamentally, three phenomena (crack tip diversion, crack front bifurcation and metal crumb formation) were observed to influence the rate of FCG. These phenomena appear to be a function of the material microstructure, environment and crack tip loading conditions. The three factors retarded the crack growth by reducing or redistributing the effective driving force at the main active crack tip. A crack path containing extensively the three phenomena was observed to offer strong resistance to FCG. In SW, the degree of the electrochemical dissolution of the microplastic zone appears to be an additional primary factor influencing FCG in the steels.

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Section: Fcgrs In Nr and Tmcp S355 Steels In Airmentioning

confidence: 99%

Section: Experimental Materials and Test Conditionsmentioning

confidence: 99%

“…The test set-up, loading conditions, crack growth monitoring, estimation and FCGR calculations are presented in detail in other studies. 23,39,43…”

Section: Experimental Materials and Test Conditionsmentioning

confidence: 99%

Section: Fcgrs In Nr and Tmcp S35steels In Swmentioning

confidence: 99%

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The influence of microstructure on the fatigue crack growth rate in marine steels in the Paris Region

Igwemezie

2020

Fatigue Fract Eng Mat Struct

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“…Extensive studies have been carried out to improve the fatigue strength of various steel grades through effective tempering processes 6–10 . In conventional steels, air cooling (AC) from the forging temperature results in a ferrite/pearlite microstructure whose tensile properties and yield strength are inferior to those of QT steels 11–13 . Numerous investigations have also been carried out to determine the effect of QT treatment on cementite precipitates.…”

Section: Introductionmentioning

confidence: 99%

Fatigue behaviour of a multiphase medium carbon steel: Comparison between ferrite/pearlite and tempered microstructures

Zhang

Susmel

et al. 2020

Fatigue Fract Eng Mat Struct

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Fatigue crack growth is the essential process in the total life of components and is unavoidable in most structures and machines. In this study, the effects of cementite particles on the fatigue properties of medium carbon steel were investigated. A quenching and tempering treatment was developed to obtain uniformly distributed cementite particles with dozens of nanometres. To evaluate the fatigue properties, fatigue strength, fatigue crack growth rate and dynamic mechanical behaviour were examined. It was found that the fatigue strength of the tempered steel is much higher than that of air cooling ferrite/pearlite steel because the cementite particles act as barriers and hinder crack propagation during cyclic loading. More importantly, the high sensitivity of the damping peak to prior fatigue may play an important role on the fatigue history of multiphase medium carbon steel.

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Mechanism of Crack Propagation during Hot‐Rolling Process of a Medium‐Carbon 40Cr Alloy Steel

Wang

et al. 2023

steel research int.

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In this work, the mechanism of crack propagation during hot‐rolling process of a typical medium‐carbon 40Cr alloy steel is investigated by cracks characterization, thermodynamic calculation, and confocal laser scanning microscopy (CLSM). The depth of cracks is about 2.5 mm and its length along with rolling direction can even reach 2000–3000 mm. Thermodynamic calculations show that the oxide phases including MnSiO3 and MnCr2O4 can generate when the oxygen content is 0.3–1.0 wt%, suggesting that low oxygen is beneficial to the selective oxidation of Si, Mn, and Cr elements from the medium‐carbon low alloy. Furthermore, in situ experiment by CLSM indicates that the submicron Cr–Mn–Si–O particles can refine austenite grains. In addition, the contents of chain proeutectoid ferrite in the steel containing Cr–Mn–Si oxides increase by 6.3% and 12.0% at the lower cooling rates of 5 and 10 °C min−1, respectively, comparing with that of no‐oxide particles steel. The submicron Cr–Mn–Si–O particles can refine austenite grains, which induces the precipitation of chain proeutectoid ferrite. Thus, the serious surface cracks propagate along the chain proeutectoid ferrite with the submicron Cr–Mn–Si–O particles during the hot‐rolling process.

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Critical assessment of the fatigue crack growth rate sensitivity to material microstructure in ferrite-pearlite steels in air and marine environment

Cited by 35 publications

References 43 publications

The influence of microstructure on the fatigue crack growth rate in marine steels in the Paris Region

The influence of microstructure on the fatigue crack growth rate in marine steels in the Paris Region

Fatigue behaviour of a multiphase medium carbon steel: Comparison between ferrite/pearlite and tempered microstructures

Mechanism of Crack Propagation during Hot‐Rolling Process of a Medium‐Carbon 40Cr Alloy Steel

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