scholarly journals Experimental Study on Corrosion Fatigue Performance of High-Strength Steel Wire with Initial Defect for Bridge Cable

2020 ◽  
Vol 10 (7) ◽  
pp. 2293
Author(s):  
Ying Wang ◽  
Wenhui Zhang ◽  
Yuqian Zheng
Keyword(s):  
Corrosion Fatigue ◽  
Steel Wire ◽  
High Strength ◽  
Fatigue Performance ◽  
Fatigue Load ◽  
Test Device ◽  
Initial Defect ◽  
Corrosive Solution ◽  
Combined Action ◽  
Bridge Cable

The durability problem in high-strength steel wire used for bridge cable is becoming more and more severe due to chlorine salt erosion, with the primary corrosion morphology of steel wire surfaces being pit corrosion. To simplify the pitting formation process, a machine-cut notch was used to represent a corrosion pit caused by electrochemical non-uniformity, and then the fatigue performance and corrosion fatigue performance of steel wire with initial defects were studied experimentally. A new type of test device was designed to carry out synchronous pulsating fatigue loading on multiple wires. A series of S-N curves of steel wire with initial defects under various loading conditions was obtained, and the effects of the concentration and pH value of the corrosive solution, and the shape and dimension of the initial defect on the fatigue corrosion performance of steel wire for bridge cables were investigated. The results show that the test device designed in this paper can effectively perform the life test under the combined action of corrosive medium and fatigue load, and can considerably shorten the duration of the fatigue test. Under the combined action of corrosive medium and fatigue load, the life of steel wire with an initial defect is significantly lower than that without consideration of the corrosion effect. The corrosion fatigue performance of steel wire decreases with the increase of acidity of the corrosive solution, rather than the increase of solution concentration. The life of steel wire with a narrow deep notch is much lower than that with a wide shallow notch. The stress concentration leads to a sharp reduction in wire life.

Corrosion-Fatigue Performance of High-Strength Riser Steels in Seawater and Sour Brine Environments

2011 ◽  
Author(s):  
Stephen J. Hudak ◽  
Guadalupe B. Robledo ◽  
Jeffrey Hawk
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Corrosion Fatigue ◽  
Cathodic Protection ◽  
High Strength Steels ◽  
High Strength ◽  
Fatigue Performance ◽  
Material Strength ◽  
Loading Frequency

Although new high-strength steels have recently been developed to meet the demands of increased reservoir pressures, and sour production fluids, the corrosion-fatigue performance of these new higher-strength materials is largely unknown. The goal of this study was to fill this knowledge gap by generating corrosion-fatigue data in two aggressive environments: 1) a sour production brine, and 2) seawater with cathodic protection. The focus of the current paper is on stress-life (S-N) corrosion-fatigue results in these environments, as well as a baseline air environment. Experiments were performed on five different steels with yield strengths ranging from 848 MPa to 1080 MPa. Prior frequency-scan results based on corrosion-fatigue crack growth rate data demonstrated that not all of these material-environment combinations exhibit a saturation frequency where the detrimental environmental effect approached a constant value as the cyclic loading frequency is decreased. Consequently, S-N tests were performed at different frequencies (0.01 Hz, 0.17 Hz, and 1 Hz), depending on the fatigue life regime, in attempting to match the loading frequencies experienced in service. Corrosion-fatigue occurred at stresses well below the fatigue endurance limit in laboratory air, and cyclic lives in the seawater with cathodic protection environment were found to be 2X to 10X less than those in the baseline air environment, while cyclic lives in the sour brine environment were found to be 30X to 100X less than those in the baseline air environment. In both environments, degradation was greatest at lower stresses in the high cycle fatigue regime. The effect of material strength level had little or no measurable effect on the S-N corrosion-fatigue performance, and the effect of cyclic frequency on the corrosion-fatigue performance was mixed. The S-N response to these two variables differed significantly from recently measured fatigue crack growth kinetics in these same materials that were performed in a companion study. Possible reasons for these differences are discussed.

scholarly journals Experimental Study on Fatigue Crack Propagation of High-Strength Steel Wire with Initial Defects for Bridge Cables

2020 ◽  
Vol 10 (12) ◽  
pp. 4065
Author(s):  
Ying Wang ◽  
Wenhui Zhang ◽  
Xu Pan ◽  
Yuqian Zheng
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Steel Wire ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Test Method ◽  
Fatigue Crack Propagation Rate ◽  
Test Device ◽  
Initial Defect

In order to study the effect of initial defects on fatigue crack propagation law, a test method to identify fatigue crack propagation rate and path based on load waveform variation was presented, and a new test device was designed to apply fatigue pulsation loads to multiple wires for bridge cables simultaneously in this paper. To simplify the corrosion defect formation process, a machine-cut notch was used to describe the initial defect on the steel wire surface. Firstly, fatigue crack propagation tests were conducted on the surface notched steel wire specimens. By using crack front marking technique, the “beach-like patterns” visible to the naked eyes on the cross sections of the steel wires were formed, and the process of fatigue crack propagation can be tracked and reproduced. Then Autodesk Computer Aided Design (AutoCAD) software was used to describe the morphology of “beach-like patterns” and accurately measure the depth and width of cracks. Finally, the influence of initial defect morphology on fatigue crack propagation rate was investigated according to the relationship between fatigue cracks depth and cyclic loading numbers. The results show that the test device designed in this paper can effectively realize the synchronous fatigue crack propagation test of multiple wires, and significantly shorten the fatigue test period. By observing and analyzing the change of load waveform, the moment of fatigue crack propagation can be directly and accurately determined. The larger the depth, the smaller the width and the sharper the morphology of initial defect, the faster the crack propagation rate and the shorter the life of notched wire specimens under the combined action of fatigue loads and corrosive medium.

scholarly journals Correction: Xue, S.; Shen, R. Corrosion-Fatigue Analysis of High-Strength Steel Wire by Experiment and the Numerical Simulation. Metals 2020, 10, 734

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 910
Author(s):  
Songling Xue ◽  
Ruili Shen
Keyword(s):  
Numerical Simulation ◽  
Corrosion Fatigue ◽  
High Strength Steel ◽  
Steel Wire ◽  
High Strength ◽  
Fatigue Analysis

The authors wish to make the following corrections to this paper [...]

Influence of galvanization on the corrosion fatigue performance of high-strength steel

2014 ◽  
Vol 259 ◽  
pp. 456-464 ◽  
Author(s):  
N. Michailidis ◽  
F. Stergioudi ◽  
G. Maliaris ◽  
A. Tsouknidas
Keyword(s):  
Corrosion Fatigue ◽  
High Strength Steel ◽  
High Strength ◽  
Fatigue Performance
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