Evaluation of environmental effects on fatigue crack growth behaviour of a high strength steel in a saline solution with cathodic protection

Huneau, Bertrand; Méndez, J.

doi:10.1016/j.ijfatigue.2005.04.011

Cited by 31 publications

(20 citation statements)

References 15 publications

(30 reference statements)

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“…Similarly, mechanical effects dominate and the crack is believed to advance as a faster rate than the diffusion of hydrogen in steel at high values of K [22,36,41]. In intermediate K regime, the increase in FCP rates for steels in seawater under CP potentials has been reported compared to an air environment, due to the effect of hydrogen within and immediately ahead of the crack tip plastic zone [22,42,43]. The present study indicated that the CP potentials of -850 and -1,050 mV SCE suppressed the environmental effect of seawater on the FCP behavior of X80 steel over the entire K regime.…”

Section: Resultsmentioning

confidence: 99%

Effect of applied potential on fatigue crack propagation behavior of API X80 steel in seawater

et al. 2014

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In the present study, the fatigue crack propagation (FCP) tests were conducted on X80 steel in air and artificial seawater (ASW) under various applied potentials to establish optimum and safe working limits of cathodic protection (CP). The slow strain rate test (SSRT) was also conducted on the X80 BM specimens in ASW under CP potential to identify the susceptibility of hydrogen affecting the FCP behavior. The CP potential of -850 and -1,050 mV SCE suppressed the environmental effect of seawater on the FCP behavior of X80 BM and WM specimens, showing almost identical da/dN-K curves for both air and ASW environments. The SSRT in ASW under CP potential of -1,050 mV SCE suggested that the X80 BM specimen steel is susceptible to hydrogen embrittlement, but the effect of hydrogen was believed to be marginal in affecting the FCP behavior of the X80 specimens at a loading frequency of 10 Hz. The FCP behavior of high strength X80 steel is discussed based on the fractographic observation to understand the FCP mechanism in seawater under various CP potentials.

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Section: Resultsmentioning

confidence: 99%

Effect of applied potential on fatigue crack propagation behavior of API X80 steel in seawater

et al. 2014

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“…Based on the test results of high-strength steel wires, Huneau and Mendez (2006) suggested us to evaluate corrosion fatigue crack growth using Paris-Erdogan law (Paris & Erdogan, 1963):…”

Section: Corrosion Fatiguementioning

confidence: 99%

Probabilistic deterioration model of high-strength steel wires and its application to bridge cables

Zhu

et al. 2014

Structure and Infrastructure Engineering

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Bridge inspections reveal that severe corrosion and fatigue are the main failure mechanisms of bridge stay cables. This paper presents an empirical modelling of the long-term deterioration process of steel wires in cables with consideration of the simultaneous occurrence of uniform corrosion, pitting corrosion and fatigue induced by a combined action of environmental aggression and cyclic loading. Accelerated corrosion experiments are conducted to determine the different corrosion levels of high-strength steel wires, and time-dependent statistical models are developed to quantify uniform and pitting corrosion depth. Corrosion-fatigue process of steel wires is subsequently simulated using the corrosion models and cyclic stress obtained through cable force monitoring data. The mechanical properties of corroded steel wires, including yield stress, ultimate stress, ultimate strain and modulus of elasticity, are experimentally characterised, and the statistical models are established through regression analysis. Finally, the deterioration models of high-strength steel wires (including crack depth, ratio of broken wires, and remaining strength, among others) is extended to probabilistically assess the time-variant conditions of bridge cables (sectional area loss and remaining capacity). The presented study on the long-term deterioration of bridge cables would provide guidance to future decision-making regarding the maintenance and replacement of bridge cables.

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“…The crack growth rate due to corrosion fatigue often consists of three regions depending on the amplitude of stress intensity factor Δ K , and each region is generally modeled by a power law defined by Equation (8) 26. In the first region, the crack growth rate due to corrosion fatigue is higher than that in air; the second region is associated with a frequency‐dependent plateau that implies a nearly constant crack growth rate; while in the third region the crack growth rate is similar to that in air.…”

Section: Deterioration Process Of Suspender Under Traffic Loadsmentioning

confidence: 99%

“…In the first region, the crack growth rate due to corrosion fatigue is higher than that in air; the second region is associated with a frequency‐dependent plateau that implies a nearly constant crack growth rate; while in the third region the crack growth rate is similar to that in air. However, Huneau and Mondez 26 conducted corrosion fatigue tests of high‐strength steel wires with a diameter of 5 mm in 3.5% NaCl solution, and measured crack growth rates of small cracks. Different power‐law regions were not observed in their testing results, because the crack growth rates remain below the value corresponding to the plateau observed in long crack d a /d N –Δ K curves 26.…”

Section: Deterioration Process Of Suspender Under Traffic Loadsmentioning

confidence: 99%

Long-term condition assessment of suspenders under traffic loads based on structural monitoring system: Application to the Tsing Ma Bridge

Li¹,

Zhu²,

Xu³

et al. 2010

Struct. Control Health Monit.

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Structural health monitoring (SHM) system provides an efficient way to the diagnosis and prognosis of critical and large-scale civil infrastructures like long-span bridges. This paper presents a long-term condition assessment approach of suspenders in a cable-suspension bridge under in-service traffic loads based on structural monitoring technique. The traffic loads identified from a monitoring system, including both highway and railway traffic loads, and the finite element model of the bridge are employed to determine the axial force response of the suspender. The stochastic axial force response in the suspender is described by a filtered Poisson process, through which the maximum value distribution of axial forces in its design reference period can be derived using the Poisson Process theory. In this paper, the long-term deterioration process of steel wires in the suspender considers simultaneously the uniform and pitting corrosion and the corrosion fatigue induced by both cyclic loading and environmental attack. Such a stochastic and coupled corrosion fatigue process of steel wires is simulated using the Monte Carlo method, and the time-variant conditions of the suspender are subsequently assessed in a probabilistic way, such as crack depth, number of broken wires, ultimate strength, etc. In particular, two load conditions-the train loads alone and the combination of train load and road traffic load-are examined within this procedure in order to investigate their respective effects on the deterioration. By employing first-order reliability method, the reliability indexes of the suspender under the traffic loads are further estimated in terms of the safety under the extreme traffic load distribution in the design reference period and the serviceability specified in the design specification. The discussions of the life-cycle reliability indexes of the suspender provide guidance to the future decision making related to maintenance and replacement of suspenders, and it may also shed light on the long-term condition assessment of other structural members.The Tsing Ma Bridge is a cable-suspension bridge located in Hong Kong with an overall length of 2160 m and a main span of 1377 m (as shown in Figure 2). The height of the two towers is 206 m from the base level to the tower saddle. The two main cables of 36 m apart are accommodated by the four saddles located at the top of the tower legs in the main span, and

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Evaluation of environmental effects on fatigue crack growth behaviour of a high strength steel in a saline solution with cathodic protection

Cited by 31 publications

References 15 publications

Effect of applied potential on fatigue crack propagation behavior of API X80 steel in seawater

Effect of applied potential on fatigue crack propagation behavior of API X80 steel in seawater

Probabilistic deterioration model of high-strength steel wires and its application to bridge cables

Long-term condition assessment of suspenders under traffic loads based on structural monitoring system: Application to the Tsing Ma Bridge

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