Effects of dissolved hydrogen and surface condition on the intergranular stress corrosion cracking initiation and short crack growth behavior of non-sensitized 316 stainless steel in simulated PWR primary water

Zhong, Xiangyu; Bali, Shirish Chandrakant; Shoji, Tetsuo

doi:10.1016/j.corsci.2017.02.003

Cited by 45 publications

(12 citation statements)

References 55 publications

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“…24) As for the effect of DH in the water on the SCC of type 316L SS, several researches were performed and the results varied among them. In the solution annealed steel, the minimum CGR was observed at 15 cc/kg at a temperature between 593 and 613 K, while in cold-worked type 316L SS, the maximum CGR was observed at 593 K. 22) Fracture mode also varies among researchers, which might be due to test temperature difference: TGSCC at 561 K and IGSCC at 593 K. These above results indicates that SCC susceptibility depends on both temperature and DH in hot water.…”

Section: Introductionmentioning

confidence: 78%

“…At 561 K, almost no IGSCC was observed on the fractured surface, although a very limited IGSCC initiation was recognized. 22) Many previous researchers pointed out the contribution of hydrogen to the enhancement of SCC of solution annealed stainless steels in hydrogenated water as mentioned in the introduction.…”

Section: Scc Susceptibility At Different Temperaturesmentioning

confidence: 99%

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Stress Corrosion Cracking Behavior of Type 316L and Type 310S Stainless Steels in Fusion Relevant Environments

Huang

Kimura

2018

Mater. Trans.

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Stress corrosion cracking (SCC) susceptibility of type 316L and type 310S SS in pressurized water (561/613 K) and supercritical water (773 K) at deaerated condition and with dissolved-hydrogen (DH) ranging from 0.014 to 1.4 ppm were examined by means of slow strain rate test (SSRT) method at a strain rate of 5 © 10 ¹7 s ¹1. SCC susceptibility of type 316L SS depends on test temperature and DH content. The SCC susceptibility, which was evaluated as a brittle fracture ratio, increased with increasing test temperature from 561 to 613 K, while it became much smaller in supercritical water at 773 K. At 613 K, the fracture ratio of intergranular (IG) SCC increased with increasing DH content in the pressurized water, although almost no IGSCC was observed at 561 K at any DH conditions. However, the IGSCC initiated at near specimen surface and transferred to transgranular (TG) SCC inside the specimen. The SCC susceptibility of type 310S SS is significantly lower than that of type 316L SS in the hydrogenated water at 561 and 613 K, while the trend appears to be reverse at 773 K. It is suggested that higher DH content in water is necessary to trigger IGSCC than TGSCC at 613 K.

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Section: Introductionmentioning

confidence: 78%

Section: Scc Susceptibility At Different Temperaturesmentioning

confidence: 99%

Stress Corrosion Cracking Behavior of Type 316L and Type 310S Stainless Steels in Fusion Relevant Environments

Huang

Kimura

2018

Mater. Trans.

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“…They reported that increased residual tensile stress remaining in the machining-affected layer can lead to higher microcrack initiation rate and microcrack density [3] under otherwise constant conditions. Zhong et al noticed increased surface hardness on drilled AISI 316 and claimed that this increases the susceptibility to SCC [14].…”

Section: Introductionmentioning

confidence: 99%

Stress–Corrosion Cracking of AISI 316L Stainless Steel in Seawater Environments: Effect of Surface Machining

Ren

Ernst

2020

Metals

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To understand the effect of surface machining on the resistance of to SCC (stress–corrosion cracking) in marine environments, we tested nuts surface-machined by different methods in a seawater-spraying chamber. Two forms of cracks were observed: on the machined surface and underneath it. On the surface, cracks connected with the pitting sites were observed to propagate perpendicular to the hoop-stress direction, identifying them as stress–corrosion cracks. Under the surface, catastrophic transgranular cracks developed, likely driven by hydrogen embrittlement caused by the chloride-concentrating level of humidity in the testing environment. Under constant testing conditions, significantly different SCC resistance was observed depending on how the nuts had been machined. Statistical evaluation of the nut surface-crack density indicates that machining by a “form” tool yields a crack density one order of magnitude lower than machining by a “single-point” tool. Microstructural analysis of form-tool-machined nuts revealed a homogeneous deformed subsurface zone with nanosized grains, leading to enhanced surface hardness. Apparently, the reduced grain size and/or the associated mechanical hardening improve resistance to SCC. The nanograin subsurface zone was not observed on nuts machined by a single-point tool. Surface roughness measurements indicate that single-point-tool-machined nuts have a rougher surface than form-tool machined nuts. Apparently, surface roughness reduces SCC resistance by increasing the susceptibility to etch attack in Cl--rich solutions. The results of X-ray diffractometry and transmission electron microscopy diffractometry indicate that machining with either tool generates a small volume fraction (< 0.01) of strain-induced martensite. However, considering the small volume fraction and absence of martensite in regions of cracking, martensite is not primarily responsible for SCC in marine environments.

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“…Several studies have investigated the localized/pitting corrosion mechanism of stainless steel in CO 2 environments under the CO 2 partial pressures that are not higher than 10 MPa. 13,[26][27][28][29][30] However, limited studies have reported the relationship between the extremely high partial pressure of CO 2 (above 20 MPa), stability of passive lm, and pitting corrosion of 13Cr stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Effect of extremely high CO₂ pressure on the formation of the corrosion film on 13Cr stainless steel

Zhu

Li²,

Zhang

et al. 2019

RSC Adv.

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Effects of dissolved hydrogen and surface condition on the intergranular stress corrosion cracking initiation and short crack growth behavior of non-sensitized 316 stainless steel in simulated PWR primary water

Cited by 45 publications

References 55 publications

Stress Corrosion Cracking Behavior of Type 316L and Type 310S Stainless Steels in Fusion Relevant Environments

Stress Corrosion Cracking Behavior of Type 316L and Type 310S Stainless Steels in Fusion Relevant Environments

Stress–Corrosion Cracking of AISI 316L Stainless Steel in Seawater Environments: Effect of Surface Machining

Effect of extremely high CO₂ pressure on the formation of the corrosion film on 13Cr stainless steel

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Effects of dissolved hydrogen and surface condition on the intergranular stress corrosion cracking initiation and short crack growth behavior of non-sensitized 316 stainless steel in simulated PWR primary water

Cited by 45 publications

References 55 publications

Stress Corrosion Cracking Behavior of Type 316L and Type 310S Stainless Steels in Fusion Relevant Environments

Stress Corrosion Cracking Behavior of Type 316L and Type 310S Stainless Steels in Fusion Relevant Environments

Stress–Corrosion Cracking of AISI 316L Stainless Steel in Seawater Environments: Effect of Surface Machining

Effect of extremely high CO2 pressure on the formation of the corrosion film on 13Cr stainless steel

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Effect of extremely high CO₂ pressure on the formation of the corrosion film on 13Cr stainless steel