Experimental investigation on the corrosion and corrosion fatigue behavior of butt weld with G20Mn5QT cast steel and Q355D steel under dry–wet cycle

Lu, Yan; Wang, Ruqi; Han, Qinghua; Yu, Xiaolan; Yu, Zhenchao

doi:10.1016/j.engfailanal.2021.105977

Cited by 22 publications

(6 citation statements)

References 38 publications

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“…Both adopt the local refinement technology of the mesh at the symmetric end of the pipeline, which improves the calculation accuracy and reduces the calculation scale. The material stress-strain relationship curve of the pipe model is fitted based on the Ramberg-Osgood model (Lu et al, 2022), which is defined as follows:…”

Section: Finite Element Modelmentioning

confidence: 99%

Prediction of Collapse Pressure of Submarine Pipelines in A Wide Range of Diameter-Thickness Ratio

Pang

Yan³

et al. 2022

China Ocean Eng

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Submarine pipelines play an important role in offshore oil and gas development. A touchy issue in pipeline design and application is how to avoid the local collapse of pipelines under external pressure. The pipe diameter-thickness ratio D/t is one of the key factors that determine the local critical collapse pressure of the submarine pipelines. Based on the pipeline collapse experiment and finite element simulation, this paper explores the pressure-bearing capacity of the pipeline under external pressure in a wide range of diameter-thickness ratio D/t. Some interesting and important phenomena have been observed and discussed. In the range of 16<D/t<80, both DNV specification and finite element simulation can predict the collapse pressure of pipeline quite well; in the range of 10<D/t<16, the DNV specification is conservative compared with the experimental results, while the finite element simulation results are slightly larger than the experimental results. Further parameter analysis shows that compared with thin-walled pipes, improving the material grade of thick-walled pipes has higher benefits, and for thin-walled pipes, the ovality f0 should be controlled even more. In addition, combining the results of finite element simulation and model experiment, an empirical formula of critical collapse pressure for thick-walled pipelines is proposed, which is used to correct the error of DNV specification in the range of 10<D/t<16.

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Section: Finite Element Modelmentioning

confidence: 99%

Prediction of Collapse Pressure of Submarine Pipelines in A Wide Range of Diameter-Thickness Ratio

Pang

Yan³

et al. 2022

China Ocean Eng

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“…So far, research focuses on the corrosion fatigue crack initiation mechanism and fatigue life of the butt weld between the cast steel joint and the hot rolled steel pipe. Han et al [9][10][11] have carried out detailed research on the corrosion fatigue performance of G20Mn5QT cast steel base material and butt weld under simulated seawater immersion and dry wet alternate environment. However, the research on the corrosion FCP characteristics of butt weld with G20Mn5QT cast steel and Q355D steel is still needed.…”

Section: Introductionmentioning

confidence: 99%

Effect of corrosion on the fatigue crack propagation properties of butt weld with G20Mn5QT cast steel and Q355D steel in 3.5‐wt% NaCl solution

Han,

Li,

et al. 2023

Fatigue Fract Eng Mat Struct

Self Cite

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The corrosion fatigue crack propagation (FCP) of the butt weld with G20Mn5QT cast steel and Q355D steel in 3.5‐wt% NaCl solution was investigated experimentally. Considering the influences of stress ratio and loading frequency, the corrosion FCP rate curve was obtained. The results indicated that the corrosion FCP rate in the corrosion environment is three times that in air. Increasing the stress ratio or decreasing the loading frequency will increase the corrosion FCP rate. The fracture morphology of the specimens in the corrosion environment had more corrosion pits and intergranular characteristics due to anodic dissolution than that in air. Anodic dissolution and hydrogen embrittlement jointly promoted the corrosion FCP of butt weld in simulated seawater. The corrosion FCP rate model was established considering the effects of stress ratio and loading frequency.

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“…In the past [4,23,24], scholars have mainly focused on the study of butt welds of G20Mn5QT cast steel and other materials. However, little research has been reported on the laser cladding repair of G20Mn5QT steel.…”

Section: Introductionmentioning

confidence: 99%

Parameter Optimization and Mechanical Properties of Laser Cladding of 316L Stainless Steel Powder on G20Mn5QT Steel

et al. 2023

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G20Mn5QT steel has excellent mechanical properties and is widely used in key components of rail vehicles. However, during the operation of high-speed vehicles, wear and tear will inevitably occur. In this paper, laser cladding technology was selected to successfully prepare 316L stainless steel coating. The optimum processing parameters were obtained with a laser power of 2300 W, a scanning speed of 500 mm/min, and a powder feeding speed of 14 g/min. The microstructure of 316L coating is mainly composed of planar crystals, cellular crystals, columnar crystals, and equiaxed crystals. Through range analysis, it is found that the microhardness, wear resistance, and micro-shear strength of the cladding layers increase with the increase of laser power, while the tensile strength and yield strength increase first and then decrease with the increase of laser power. Under the optimized process parameters, the low-temperature impact toughness, elongation, tensile strength, and yield strength of the cladding layer were 97.6%, 24%, 10.9%, and 32.5% higher than that of the G20Mn5QT substrate, respectively. An excellent combination of strength and toughness was achieved by cladding 316L alloy on the surface of the G20Mn5QT substrate, which can meet the requirements of remanufacturing fractional key vehicle parts.

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Experimental investigation on the corrosion and corrosion fatigue behavior of butt weld with G20Mn5QT cast steel and Q355D steel under dry–wet cycle

Cited by 22 publications

References 38 publications

Prediction of Collapse Pressure of Submarine Pipelines in A Wide Range of Diameter-Thickness Ratio

Prediction of Collapse Pressure of Submarine Pipelines in A Wide Range of Diameter-Thickness Ratio

Effect of corrosion on the fatigue crack propagation properties of butt weld with G20Mn5QT cast steel and Q355D steel in 3.5‐wt% NaCl solution

Parameter Optimization and Mechanical Properties of Laser Cladding of 316L Stainless Steel Powder on G20Mn5QT Steel

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