Detection of stress corrosion cracking in a simulated BWR environment by combined electrochemical potential noise and direct current potential drop measurements

Ritter, Stefan; Seifert, Hans-Peter

doi:10.1179/174892408x394173

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…The normalized potential drop Usp,0/Uref,0 at the crack initiation point was assigned to the initial notch depth a0. In contrast to notched tensile specimens [42] in slow strain rate tests or pre-cracked specimens in slow rising load tests [43,44], the effect of the geometry change and blunting by plastic deformation and growth of plastic zone at the notch root on the DCPD potential drop in the sharply notched C(T) specimens under small scale yielding conditions in the rising load phase is very moderate. There is usually no or only a very small linear increase of Usp/Uref with the crack opening displacement at load line CODLL or load before crack initiation.…”

Section: Scc Initiation and Short Crack Growth Testsmentioning

confidence: 85%

Stress corrosion cracking initiation and short crack growth behaviour in Alloy 182 weld metal under simulated boiling water reactor hydrogen water chemistry conditions

et al. 2018

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The effect of dissolved hydrogen on the stress corrosion cracking initiation and short crack growth behaviour of Alloy 182 weld metal was evaluated in 274 °C hydrogenated high-purity water using accelerated crack initiation and growth tests with sharply notched fracture mechanics specimens and in-situ crack initiation and growth monitoring. A maximum in initiation susceptibility and crack growth rates was observed at the Ni/NiO phase transition line. Grain boundary misorientations and mismatch in Schmid factor were measured by electron backscattered diffraction along intergranular stress corrosion cracks and at crack initiation sites. Low angle boundaries seem to be particularly resistant to cracking.

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Section: Scc Initiation and Short Crack Growth Testsmentioning

confidence: 85%

Stress corrosion cracking initiation and short crack growth behaviour in Alloy 182 weld metal under simulated boiling water reactor hydrogen water chemistry conditions

et al. 2018

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“…[1][2][3][4][5] The direct current potential drop (DCPD) technique is one of the commonly used techniques for this kind of test, and is especially suitable for closed environment. [6][7][8][9] The DCPD technique is based on detection of the change in electrical potential of a specimen with change in crack length. 10,11 The calibration of the potential drop and crack length relationship is the basis of DCPD technique.…”

Section: Introductionmentioning

confidence: 99%

Effect of deformation on crack extension measurement for compact tension specimen with the DCPD technique

Xue

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Direct current potential drop (DCPD) technique is a crack growth monitoring technique widely used in the crack growth test of specimens in laboratory environment. Deformation of the specimen during test is one of the important factors that affect the accuracy and resolution. Because the effect of deformation on measurement is usually mixed with other factors, quantitative evaluation is difficult through experiments method only. In this work a novel quantitative estimation method combining experiment and finite element analysis has been proposed, and the effect of deformation on measurement for 316 L stainless steel compact tension specimen has been quantitatively evaluated. Through the tensile test and DCPD monitoring test of the non-cracked 316 L stainless steel plate-shaped specimen, the material mechanical property parameters and the change of potential drop caused by deformation were obtained. Then the slow tensile tests have been performed on compact tension specimens. Combined with the FE simulation of the experimental process, the effect of deformation on the potential drop under different crack length has been evaluated. The results show that the influence of deformation on the potential drop is a factor that must be considered for the crack growth monitoring experiment with high crack growth resolution. The proposed method can be used to quantitatively evaluate the influence of deformation, a factor that was usually ignored in the past, on the measurement of crack growth, which provides a method and basis for correction of crack measurement errors caused by deformation. In addition, the proposed method can be used to obtain a more accurate calibration function, which is of great significance to the improvement of the accuracy and resolution of crack growth monitoring.

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Acoustic emission response of 304 stainless steel during constant load test in high temperature aqueous environment

Han

2012

Corrosion Science

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Detection of stress corrosion cracking in a simulated BWR environment by combined electrochemical potential noise and direct current potential drop measurements

Cited by 4 publications

References 6 publications

Stress corrosion cracking initiation and short crack growth behaviour in Alloy 182 weld metal under simulated boiling water reactor hydrogen water chemistry conditions

Stress corrosion cracking initiation and short crack growth behaviour in Alloy 182 weld metal under simulated boiling water reactor hydrogen water chemistry conditions

Effect of deformation on crack extension measurement for compact tension specimen with the DCPD technique

Acoustic emission response of 304 stainless steel during constant load test in high temperature aqueous environment

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