Effect of stress ratios on corrosion fatigue life of high‐strength steel wires

2021 ◽  
Author(s):  
Zhiyu Jie ◽  
Chao Chen ◽  
Filippo Berto ◽  
Kainan Wang ◽  
Xi Peng
Keyword(s):  
Fatigue Life ◽  
Corrosion Fatigue ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Wires ◽  
Stress Ratios

Effect of the galvanization process on the fatigue life of high strength steel compression springs

2021 ◽  
Vol 63 (3) ◽  
pp. 226-230
Author(s):  
Fatih Özen ◽  
Ahmet İlhan ◽  
Hakkı Taner Sezan ◽  
Erdinç İlhan ◽  
Salim Aslanlar
Keyword(s):  
Fatigue Life ◽  
Hydrogen Embrittlement ◽  
High Strength Steel ◽  
Reaction Force ◽  
Fatigue Crack Initiation ◽  
High Strength ◽  
Steel Wires ◽  
Compression Spring ◽  
Spring Wire ◽  
Compression Springs

Abstract In this study, a compression spring fatigue problem arising from the galvanization process was investigated. Fatigue, crack initiation and growth of galvanized and non-galvanized springs manufactured from fully pearlitic high strength steel wires were investigated. According to the results, the galvanized compression springs exhibited a low fatigue life due to hydrogen embrittlement. Hydrogen embrittlement induced crack initiations formed under the galvanizing layer and adversely affect fatigue life. It was observed that local embrittlement on the outer surface of the spring wire causes crack initiations and disperses through the pearlitic interlamellar microstructure. Compared to non-galvanized and shot-peened specimens with the same surface roughness, compression springs, galvanized compression springs exhibited a 25 % reaction force loss at 50 000 cycles.

scholarly journals Corrosion-Fatigue Analysis of High-Strength Steel Wire by Experiment and the Numerical Simulation

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 734
Author(s):  
Songling Xue ◽  
Ruili Shen
Keyword(s):  
Fatigue Life ◽  
Service Life ◽  
Prediction Model ◽  
Corrosion Fatigue ◽  
High Strength Steel ◽  
Life Prediction ◽  
Steel Wire ◽  
High Strength ◽  
Starting Point ◽  
Life Prediction Model

The paper takes the corrosion fatigue damage of cable or sling in the actual bridge as a starting point. The high-strength steel wire is chosen as the basic component to study the corrosion fatigue failure mode. The service life prediction model is put forward, which provides a basis for future research. In this paper, the S-N curves of the steel wire with the different corrosion degrees are given through fatigue tests of six groups of steel wire under different corrosion conditions. The results show that the higher the corrosion degree, the steeper the S-N curve, and the fatigue life considering corrosion are much lower than that without considering corrosion. Finally, a fatigue life prediction model considering the coupling effect of corrosion fatigue is proposed and embedded into Abaqus v6.14 (Dassault, Paris, French). The calculation results show that the fatigue model considering the corrosion can predict the service life to some extent.

scholarly journals Research on Corrosion Fatigue Performance and Multiple Fatigue Sources Fracture Process of Corroded Steel Wires

2019 ◽  
Vol 2019 ◽  
pp. 1-24 ◽  
Author(s):  
Ying Wang ◽  
Yuqian Zheng
Keyword(s):  
Corrosion Fatigue ◽  
High Strength Steel ◽  
Damage Evolution ◽  
Fracture Process ◽  
Steel Wire ◽  
High Strength ◽  
Evolution Process ◽  
Steel Wires ◽  
Corrosion Pit ◽  
Corrosion Pits

Corrosion fatigue (CF) failure is one of the typical failure modes of high-strength steel wires for bridge cables because the cables are subjected to long-term fatigue loads and exposed to heavily polluted environment simultaneously. In this paper, a numerical simulation method was proposed to study CF performance of corroded high-strength steel wires. Firstly, the cellular automata (CA) method was used to generate a numerical model of corroded steel wires with corrosion pit, which can accurately describe the electrochemical process of metal corrosion. In the established CA model, three kinds of cells were involved, namely, metal cell, passive film cell, and corrosive medium cell. By setting 10 cellular transformation rules, morphology of the random corrosion pit on the steel wire surface was simulated. And then, a damage evolution model related to coupling of corrosivemedium and fatigue loads (CCF) was developed to describe the CF damage evolution process of steel wires. Subsequently, the damage evolution process was analyzed by ABAQUS with a user-defined material subroutine (UMAT). Finally, the life of corroded steel wires was predicted, and the CF performance of corroded steel wires with multiple corrosion pits was evaluated. The results show that the proposed method can reasonably describe the CF damage evolution process and illuminate the failure mechanism of steel wires subjected to the CCF. Damage of the steel wire with a single corrosion pit evolves gradually, and the damage evolution rate increases. For the steel wires with multiple corrosion pits, the corrosion pits affect mutually in the fracture process. When the angle and distance between corrosion pits reach a certain degree, the mutual effects can be ignored. With the same pit depth, the angle and distance among corrosion pits determine the CF life of steel wires mainly, and the number of corrosion pits affects slightly.

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