Modeling of stress corrosion cracking growth rates for key structural materials of nuclear power plant

Li, Z.H.; Lu, Yonghao; Wang, Xinyu

doi:10.1007/s10853-019-03968-w

Cited by 26 publications

(7 citation statements)

References 112 publications

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“…( 6), This contributes to the quantitative technique to estimate SCC growth that is presented in this paper. [21]. The essential idea is represented in Fig.…”

Section: Slip Dissolution/film Rupture Mechanismmentioning

confidence: 99%

Crack Propagation in Pipelines Under Extreme Conditions of Near-Neutral PH SCC

Alsit¹,

Alkhedher²,

Hamdan³

2022

Computers, Materials &Amp; Continua

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Stress Corrosion Cracking (SCC) process through which cracks occur in a variety of susceptible materials is a result of a combination of residual or applied stresses and corrosion. In oil and gas field, buried pipeline steels are made of low-alloy steels with a ferritic-pearlitic structure, such as X70. In dilute solutions, these materials are prone to SCC failure. The Near-neutral simulated soil solution (NS4) solution is established to imitate SCC conditions and subsequently became the industry requirement for crack growth experiments in the majority of laboratories. The strainassisted active crack pathways are considered while modelling SCC growth as an oxide film rupture and anodic dissolution process. It's been hypothesized that increasing the strain concentration can help with dissolution at the filmfree crack tip. This research focuses on estimating the SCC crack growth rate under various environmental conditions in oil and gas pipelines using finite element modelling. The simulation is carried out using the J-integral theory in the COMSOL Multiphysics program. Simulations are performed to model the crack growth rate (CGR) using slip anodic dissolution (film rupture) mechanism. The plastic strain gradient is required to compute the SCC CGR (da/dt). Because the plastic strain located at crack tip increases proportionally to the crack length as it propagates, the CGR increases as the stress intensity factor (SIF) increases. The crack growth rates increase when constant loads are applied and as the temperature rises, and elevating the cathodic potential has a minimal influence on the propagation rate of cracks but raises the material yield strength and imparts brittle behavior to it.

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“…( 6), This contributes to the quantitative technique to estimate SCC growth that is presented in this paper. [21]. The essential idea is represented in Fig.…”

Section: Slip Dissolution/film Rupture Mechanismmentioning

confidence: 99%

Crack Propagation in Pipelines Under Extreme Conditions of Near-Neutral PH SCC

Alsit¹,

Alkhedher²,

Hamdan³

2022

Computers, Materials &Amp; Continua

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“…A comprehensive study on the modeling for predicting stress corrosion cracking (SCC), specifically in structural materials used in nuclear power plants, was recently published in 32 . Numerous references were presented and discussed, with positive outcomes of using ANNs for prediction.…”

Section: Introductionmentioning

confidence: 99%

Neural network based corrosion modeling of Stainless Steel 316L elbow using electric field mapping data

Memon

Imran

Alhems

2023

Preprint

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Stainless steel (SS) is used in many industrial applications that demand superior corrosion resistance. Modeling its corrosion behavior in common structural and various operational scenarios is beneficial to provide wall-thickness (WT) information, thus leading to a predictive asset integrity regime. In this spirit, modeling of SS 316L corrosion behavior using artificial neural networks (ANNs) is presented, whereby saline water at different concentrations is flown through an elbow structure at different flow rates and salt concentrations. Voltage, current, and temperature data are recorded hourly using electric field mapping (EFM) pins installed on the elbow surface and used for training the model. The performance of corrosion modeling is verified by comparing the predicted WT with actual measurements obtained from experimental tests. Moreover, a concise account of the observed scale formation is also reported.‏

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“…These pipes are prone to cracks due to long-term service in the harsh environment, such as corrosive liquid, high temperature, high pressure, and irradiation [3]. And the angle of the crack on the pipe is arbitrary due to the interactions of many factors [4]. If the crack is not found in time, it will rapidly * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Rotating alternating current field measurement testing system with TMR arrays for arbitrary-angle crack on nonferromagnetic pipes

Zhao¹,

Li²,

Yuan³

et al. 2022

Meas. Sci. Technol.

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Nonferromagnetic pipes are widely used in power plants such as fluid transportation and heat exchanger devices. Due to the severe environments, including corrosion, high temperature, etc., it is subject to surface arbitrary-angle cracks. In view of this background, this paper proposed a rotating alternating current field measurement (RACFM) testing system for arbitrary-angle cracks in nonferromagnetic pipes. The RACFM pipe detection model is established and the unidirectional excitation coil and the orthogonal excitation coil are simulated separately. The testing system and the probe with tunnel magneto resistance (TMR) sensor arrays and flexible orthogonal excitation coils are built to detect cracks at different angles in the pipe. The simulation and experimental results reveal that the RACFM detection system has high sensitivity for arbitrary-angle cracks in the outer surface of the pipe, and it can effectively measure the lengths and angles of the cracks.

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Modeling of stress corrosion cracking growth rates for key structural materials of nuclear power plant

Cited by 26 publications

References 112 publications

Crack Propagation in Pipelines Under Extreme Conditions of Near-Neutral PH SCC

Crack Propagation in Pipelines Under Extreme Conditions of Near-Neutral PH SCC

Neural network based corrosion modeling of Stainless Steel 316L elbow using electric field mapping data

Rotating alternating current field measurement testing system with TMR arrays for arbitrary-angle crack on nonferromagnetic pipes

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