Initiation and propagation of IGSCC for sensitized Type 304 stainless steel in dilute sulfate solutions

Zhang, S.; Shibata, Toshio; Haruna, Takumi

doi:10.1016/s0010-938x(97)00078-4

Cited by 22 publications

(9 citation statements)

References 9 publications

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“…From the results obtained, it was noted that the probabilities of failure increase with increase in ART and the probabilities of failure of vessel axial welds are a few orders of magnitude higher than that of circumferential welds. Zhang et al [11] carried out experimental investigations to determine the time to crack initiation and crack propagation velocity for intergranular stress corrosion cracks in sensitized type 304 stainless steel in dilute sulphate solutions. From a statistical analysis of the results obtained, it was seen that the time to crack initiation follows exponential distribution, whereas the crack propagation velocity follows Weibull distribution.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Failure Analysis of Austenitic Nuclear Pipelines against Stress Corrosion Cracking

Priya

Rao

Anoop

et al. 2005

Proceedings of the Institution of Mechanical Engineers, Part C:

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Stress corrosion cracking (SCC) is an important degradation mechanism to be considered for failure assessment of nuclear piping components made of austenitic steels. In this paper, an attempt has been made to compute the failure probabilities of a piping component against SCC with time using Monte Carlo simulation (MCS) technique. The initiation and propagation stages of stress corrosion cracks are modelled using the general methodology recommended in PRAISE modified by using the recommendations given by ASM for more rational modelling of stress field around cracks for estimating their growth with time. Degree of sensitization, applied stress, time to initiation of SCC, initial crack length, and initiation crack growth velocity are considered as random variables. An attempt has been made to study the stochastic propagation of stress corrosion cracks with time, using MCS technique. The trend of the distribution of crack depths at the initial stages obtained from simulation are compared and is found to be in satisfactory agreement with the relevant experimental observations reported in the literature. The failure probabilities are computed using two different failure criteria, namely (a) based on net-section stress and detectable leak rate as recommended in PRAISE and (b) based on R6 approach (using R6-option 1 curve as the failure assessment diagram). The procedure presented in the paper is general and the usefulness of the same is demonstrated through an example problem.

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Section: Introductionmentioning

confidence: 99%

Probabilistic Failure Analysis of Austenitic Nuclear Pipelines against Stress Corrosion Cracking

Priya

Rao

Anoop

et al. 2005

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Initiation and growth of cracks. The time to crack initiation under static load conditions has been found to be a function of the damage parameter D s as presented in equation (1). Therefore, the time to crack initiation t I for a given D s is taken to be log-normally distributed.…”

Section: Probabilistic Scc Modelmentioning

confidence: 99%

“…The susceptibility of this material to intergranular SCC (IGSCC) is owing to chromium carbide precipitation in the grain boundaries, which leaves the regions immediately adjacent to these grain boundaries low in corrosion-resistant chromium. 1 The precipitation occurs most commonly under the thermal conditions encountered during welding. The stress is primarily owing to weld shrinkage during fabrication, and the corrosive environment results from coolant oxygen and low impurity levels according to the operating specifications.…”

Section: Introductionmentioning

confidence: 99%

Effects of remedial actions on small piping reliability

Guedri

2013

Proceedings of the Institution of Mechanical Engineers, Part O:

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This article describes probabilistic calculations that address intergranular stress corrosion cracking of stainless steel piping; a degradation mechanism of major concern to nuclear pressure boundary integrity. The objective is to simulate the cracking of stainless steel piping under intergranular stress corrosion cracking conditions, and to evaluate the structural reliability using remedial actions for intergranular stress corrosion cracking that are limited to benefits of in-service inspections and the induction heating stress improvement process. The results show that an effective in-service inspection requires a suitable combination of flaw detection capability and inspection schedule, and it has been suggested that the residual stresses could be altered to become favorable, thereby improving the reliability piping.

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“…Zhang and al. have done experimental verifications to determine the initiation time and the propagation rate of IGSCC in sensitized stainless steel type AISI 304 in diluted sulfate solutions [2]. Many researchers have approached the probabilistic analysis of components failure due to SCC based on fracture mechanics [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Environmental effects on the reliability of an AISI 304 structure

Boutelidja

Guedri

Belyamna

et al. 2019

Frattura Ed Integrità Strutturale

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This work is based on the application of probabilistic fracture mechanics models to predict the reliability of pressure pipelines in nuclear power reactors. The simulation of cracking of stainless steel piping under the conditions of intergranular stress corrosion cracking (IGSCC) is based on the improved modified piping reliability analysis including seismic events (PRAISE) code. The IGSCC is characterized by a unique damage parameter that depends on residual stresses and environmental conditions. Case studies of IGSCC failures in nuclear power plants are presented and the contribution of environmental effects on crack initiation and leakage is discussed. For small damages we observed that the change in temperature or oxygen concentration does not affect the initiation process but their decrease contribute favourably to the decrease in the leakage probabilities.

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Initiation and propagation of IGSCC for sensitized Type 304 stainless steel in dilute sulfate solutions

Cited by 22 publications

References 9 publications

Probabilistic Failure Analysis of Austenitic Nuclear Pipelines against Stress Corrosion Cracking

Probabilistic Failure Analysis of Austenitic Nuclear Pipelines against Stress Corrosion Cracking

Effects of remedial actions on small piping reliability

Environmental effects on the reliability of an AISI 304 structure

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