Role of Cavity Formation on Crack Growth of Cold‐Worked Carbon Steel, TT 690 and MA 600 in High Temperature Water

Arioka, Koji; Miyamoto, Tomoki; Yamada, Takuyo; Terachi, Takumi

doi:10.1002/9781118456835.ch8

Cited by 5 publications

(10 citation statements)

References 26 publications

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“…CGRs of the forged 316 stainless steel are ∼8.5 times and ∼2 times larger than those of the 20 and 30% cold‐worked 316 stainless steel in oxygenated water with 2000 and 100 ppb DO, respectively. However, when tested in deaerated high temperature water, the CGRs of the forged 316 stainless steel are similar to or even lower than those of cold‐worked 316L . Moreover, in hydrogenated high temperature water, the CGRs of the forged 316 stainless steel are lower than those of 15 and 20% cold‐worked 316L, and similar to those of 5 and 10% cold‐worked 316L .…”

Section: Resultsmentioning

confidence: 86%

“…The CGRs with the value of 1.76–5.0 × 10 −6 mm/s in this study are more than one order of magnitude larger than those previously reported. The difference may be caused by the following reasons: (1) faster crack growth is observed in oxygenated water (DO = 2000 ppb) than in hydrogenated water; (2) the serious deformation of austenitic stainless steel accelerates the CGR in high temperature water; (3) test environment at higher temperature (320 °C) always increase the intergranular SCC susceptibility; and (4) trapezoidal waveform loading results in higher CGR than constant loading or constant K loading…”

Section: Resultsmentioning

confidence: 99%

“…Intergranular SCC path at the tip of the crack is clearly identified from the microstructural characteristics. Arioka et al reported that the grain boundary diffusion of vacancies to the tip may be significant in the intergranular SCC growth of austenitic stainless steel in high temperature water. The grain boundary characteristic distributions are shown in Figure b.…”

Section: Resultsmentioning

confidence: 99%

“…Summary of the effect of DO and DH on CGRs of the 316 stainless steel in high temperature water at 310–320 °C . CW, cold worked; Trap., trapezoidal waveform loading, load ratio of 0.7, unload time and reload time of 500 s, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…However, both laboratory investigations and field experience have revealed that the SCC susceptibility of Fe‐Ni‐Cr alloys in high temperature water is increased because of the work‐hardening induced by material deformation . Much research has focused on the SCC behaviors of cold‐rolled 316 stainless steels . However, the SCC behaviors of forged 316 stainless steel have not yet been studied systematically in high temperature water.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of stress corrosion cracking susceptibility of forged 316 stainless steel in simulated primary water

Zhu

Wang

Ming

et al. 2017

Materials & Corrosion

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The bolts for the reactor coolant pump are planned to be made of the forged 316 stainless steel. Prior to use, the stress corrosion cracking (SCC) resistance of the material requires investigation in simulated primary water at 320 °C. The crack growth rates (CGRs) of two duplicate compact tension (CT) specimens are measured using direct current potential drop method. The effects of stress intensity factor (K, changes from 21 to 41 MPa√m), dissolved oxygen (DO, changes from <10 to 2000 ppb) and dissolved hydrogen (DH, 2800 ppb) on CGRs are comprehensively examined. The results indicate that CGR increases with increasing K. The forged 316 stainless steel is sensitive to SCC in oxygenated water. Changing oxygenated water to hydrogenated water leads to more than one order of magnitude decreases of CGR. The fracture surface, crack path, and the influence of the crack branching on CGR are discussed.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of stress corrosion cracking susceptibility of forged 316 stainless steel in simulated primary water

Zhu

Wang

Ming

et al. 2017

Materials & Corrosion

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A mechanistic study of the temperature dependence of the stress corrosion crack growth rate in SUS316 stainless steels exposed to PWR primary water

et al. 2016

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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.

show abstract

Role of Cavity Formation on Crack Growth of Cold‐Worked Carbon Steel, TT 690 and MA 600 in High Temperature Water

Cited by 5 publications

References 26 publications

Evaluation of stress corrosion cracking susceptibility of forged 316 stainless steel in simulated primary water

Evaluation of stress corrosion cracking susceptibility of forged 316 stainless steel in simulated primary water

A mechanistic study of the temperature dependence of the stress corrosion crack growth rate in SUS316 stainless steels exposed to PWR primary water

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

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