Probabilistic corrosion-fatigue prognosis of rib-to-deck welded joints in coastal weathering steel bridges exposed to heavy traffics

Zhu, Jin; Chen, Yuanwen; Heng, Junlin; Wu, Mengxue; Zhang, Yu; Li, Yongle

doi:10.1016/j.ijfatigue.2024.108210

Cited by 2 publications

(1 citation statement)

References 60 publications

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“…With the booming development of the manufacturing industry, welding, as a common permanent connection method, is widely used in fields such as construction [1], bridges [2,3], aerospace [4][5][6], etc. During the welding process, changes in many factors can have an impact on the formation of welds, thereby affecting welding quality and product performance.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Detecting Weld Stability Based on Color Digital Holography

Li,

He,

Xia

et al. 2024

Applied Sciences

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Weld stability is directly related to the safety and reliability of engineering, and continuous improvement of its detection technology has great research significance. This paper presents a novel method for weld stability detection based on color digital holography. A color digital holography optical path was designed to capture the holograms of welds under varying loads. Several common denoising algorithms were used to deal with speckle noise in the wrapped phase, among which the 4-f optical simulation integrated cycle-consistent generative adversarial network (4f-CycleGAN) denoising algorithm based on deep learning was more suitable for the color digital holographic detection system. The three-dimensional deformation fields of three samples (lap-jointed, butt-jointed, and defective butt-jointed aluminum alloy plates) under different loads were calculated. The center profile of the deformation field in the direction of load and holographic reconstruction images are used to determine the position of the weld. The coefficient of variation near the weld was used to evaluate the weld stability. The coefficient of variation for lap-jointed, butt-jointed and defective butt-jointed plates are 0.0335 (<0.36, good stability), 0.1240 (<0.36, good stability) and 0.3965 (>0.36, poor stability), respectively. The research results of this paper provide a new strategy for detecting weld stability.

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Section: Introductionmentioning

confidence: 99%

A New Method for Detecting Weld Stability Based on Color Digital Holography

Li,

He,

Xia

et al. 2024

Applied Sciences

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Effect of Cr Content on Hot Deformation Behavior and Microstructure Evolution of Cu–Cr–Ni Bridge Weathering Steel

Xu,

Zhang,

Zhang

et al. 2024

steel research int.

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The hot compression tests (T = 850–1100 °C, = 0.1–10 s−1) of Cu–Cr–Ni bridge weathering steel with different Cr content (0.46% (#1), 0.64% (#2)) were performed on Gleeble‐3800‐D thermomechanical simulator. The effects of Cr content on hot deformation and microstructure evolution are systematically investigated by the Arrhenius constitutive equation, processing map, electron backscatter diffraction technology, and transmission electron microscope. In the results, it is demonstrated that the increase of Cr content from 0.46% to 0.64% enhances the solution strengthening and inhibits the dynamic recrystallization of the experimental steels during hot compression, resulting in the increase of flow stress. The Arrhenius constitutive equation with strain compensation is constructed. The increase of Cr content results in an augmentation of hot deformation activation energy, rising from Q#1 = 358.47 kJ mol−1 to Q#2 = 396.79 kJ mol−1, causing the increase of deformation resistance of Cu–Cr–Ni bridge weathering steel in hot compression. The optimal hot processing window of #1 and #2 experimental steels is as follows: = 0.1–0.2 s−1, T = 1050–1100 °C, = 0.1–0.15 s−1, and T = 1050–1100 °C, the increase of Cr content leads to the narrowing of the hot processing window of the experimental steels.

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Probabilistic corrosion-fatigue prognosis of rib-to-deck welded joints in coastal weathering steel bridges exposed to heavy traffics

Cited by 2 publications

References 60 publications

A New Method for Detecting Weld Stability Based on Color Digital Holography

A New Method for Detecting Weld Stability Based on Color Digital Holography

Effect of Cr Content on Hot Deformation Behavior and Microstructure Evolution of Cu–Cr–Ni Bridge Weathering Steel

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