Effects of water chemistry and loading conditions on stress corrosion cracking of cold-rolled 316NG stainless steel in high temperature water

Lu, Zhanpeng; Shoji, Tetsuo; Meng, Fanjiang; Qiu, Yubing; Dan, Tichun; Xue, He

doi:10.1016/j.corsci.2010.09.018

Cited by 67 publications

(19 citation statements)

References 26 publications

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“…[10][11][12][13][17][18][19][22][23][24][25][26] CGRs of sensitised 304SS and solution annealed non-sensitised stainless steels increased monotonically with electrochemical potential, which tended to reach a plateau at high DO concentrations where corrosion potential and CGR were not sensitive to DO in this range. Decreasing electrode potential moderately inhibited crack growth of prior hardened austenitic stainless steels in high temperature pure water, which was less significant than that of sensitised 304 stainless steels and as solution annealed low C stainless steels in similar environments.…”

Section: Effects Of Do Concentration On Scc Growth Ratesmentioning

confidence: 99%

Effects of water chemistry on stress corrosion cracking of 316NG weld metals in high temperature water

Shoji

Takeda

2014

Corrosion Engineering, Science and Technology

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Effects of dissolved oxygen concentration from 0?2 to 11 ppm on stress corrosion cracking growth rates of 316NG weld metals in pure water at 288uC were investigated. Crack growth rates in the weld metal with a ferrite content of about 6?5 wt-% are higher than those in the weld metal with a ferrite content of about 8?5 wt-% under the same test environments, which increased with increasing dissolved oxygen concentration from 0?2 to 2 ppm. The dependence of crack growth rates on dissolved oxygen concentration in the range from 2 to 11 ppm was affected by the ferrite content in the weld metals.

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Section: Effects Of Do Concentration On Scc Growth Ratesmentioning

confidence: 99%

Effects of water chemistry on stress corrosion cracking of 316NG weld metals in high temperature water

Shoji

Takeda

2014

Corrosion Engineering, Science and Technology

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“…Based on the SCC statistics identified in the French PWRs by Couvant et al [1], most of the cases were identified after a period of at least of 50000 hours. Literature results also indicate that the water chemistry [9][10][11], testing temperature [12], degree and paths of pre-strain [9,10,13,14] and surface finish [15][16][17] and heat treatment are the main factors that influence SCC. Furthermore, when austenitic stainless steels are exposed to high temperature water, a double layer structured oxide layer forms, which consists of a fine grained, compact, and chromium-rich inner oxide layer Kruska et al and Lozano-Perez suggest that the oxidation which preferentially occurs along the grain boundaries and slip bands could be one of the possible reasons for the occurrence of SCC.…”

Section: Introductionmentioning

confidence: 99%

Oxidation and SCC Initiation Studies of Type 304L SS in PWR Primary Water

Scenini¹,

Lindsay²,

Chang³

et al. 2017

The Minerals, Metals &Amp; Materials Series

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Slow strain rate tensile (SSRT) tests were conducted on conventional and tapered samples manufactured from forged Type 304L stainless steel to assess the stress corrosion cracking (SCC) behaviour in simulated PWR primary water. Several testing and microstructural parameters were investigated in order to explore the conditions under which crack initiation might occur. Surface preparation appeared to play a very important role on SCC initiation whereby the machined surfaces were the least susceptible to SCC initiation whilst oxide polishing suspension (OPS) polished surfaces were more susceptible. On the machined surfaces the cracks were always transgranular (TG) in nature and associated with the machining marks. Conversely, on fine polished surfaces with oxide polishing suspension the crack morphology was mainly intergranular in nature, although minor transgranular cracking was observed. The regions in the proximity of the ferrite/austenite interface were shown to be very susceptible to SCC initiation especially on the OPS polished surfaces and this was attributed to the strain localization upon dynamic deformation. Furthermore, intragranular inclusions appeared to dissolve and act as initiation sites for transgranular cracking to occur. The roles of strain rate, dynamic deformation and microstructure on the initiation of SCC are also discussed.

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“…According to previous studies, published papers related to the effect of machining on SCC were mainly focused on the integrative working such as rolling and forging. Lu et al believed that the cold‐rolled processing has promising effect on increasing the random and Σ3 grain boundaries of 316NG SS, which finally promoted crack initiation when serviced in nuclear power plant. Meng et al indicated that the crack propagation mode was translated from transgranular (TG) to intergranular (IG) after cold rolling of 316NG SS when tested in high temperature water rich in dissolved hydrogen (DH) concentrations at 320 °C.…”

Section: Introductionmentioning

confidence: 99%

Effect of residual stress on the stress corrosion cracking in boiling magnesium chloride solution of austenite stainless steel

Wu¹,

Li²,

Fang³

et al. 2018

Materials & Corrosion

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The effect of residual stress on the stress corrosion cracking (SCC) behaviors of Z3CN20.09M, 304L and 316L austenitic stainless steels (SSs) in boiling magnesium chloride solution were investigated by X‐ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The residual stress of surface and the hardness tested on the cross section of specimens induced by milling operation was decreased with increasing annealing temperature. The crack densities were also decreased with increasing annealing temperature of the specimens, and the SCC did not occur after annealed at 600 °C for 3 h except 316L SS when tested in boiling magnesium chloride solution. Crack initiation mechanism related to the damaged effect on grain boundary during milling operation was analyzed. The double loop electrochemical potentiokinetic reactivation (DL‐EPR) tests indicated that the effect of annealing treatment up to 600 °C on intergranular (IG) corrosion susceptibility of 304L and 316L SSs was minor, while it remarkably increased of the Z3CN20.09M SS.

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Effects of water chemistry and loading conditions on stress corrosion cracking of cold-rolled 316NG stainless steel in high temperature water

Cited by 67 publications

References 26 publications

Effects of water chemistry on stress corrosion cracking of 316NG weld metals in high temperature water

Effects of water chemistry on stress corrosion cracking of 316NG weld metals in high temperature water

Oxidation and SCC Initiation Studies of Type 304L SS in PWR Primary Water

Effect of residual stress on the stress corrosion cracking in boiling magnesium chloride solution of austenite stainless steel

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