The dependency of the crack growth rate on the loading pattern and temperature in stress corrosion cracking of strain-hardened 316L stainless steels in a simulated BWR environment

Lu, Zhanpeng; Shoji, Tetsuo; Takeda, Yoichi; Ito, Yuzuru; Yamazaki, Seiya

doi:10.1016/j.corsci.2007.08.022

Cited by 45 publications

(11 citation statements)

References 19 publications

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“…If the diffusion is critical, the rise time may correlate well with the growth rate. On the other hand, the corrosion rate depends on the strain rate at the crack tip . The larger strain rate results in higher frequency of rupture and repair of the passive film at the crack tip.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, the corrosion rate depends on the strain rate at the crack tip. 30 The larger strain rate results in higher frequency of rupture and repair of the passive film at the crack tip. From a mechanistic point of view, not the nominal strain rate but the local strain rate near the crack tip should be correlated to the crack growth acceleration.…”

Section: Crack-growth Acceleration Mechanismmentioning

confidence: 99%

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Influence of strain range on fatigue life reduction of stainless steel in PWR primary water

Kamaya¹

2017

Fatigue Fract Eng Mat Struct

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The environmental effect in the pressurized water reactor (PWR) water was investigated for various applied strain range using a type 316 stainless steel. The tests were conducted using cylindrical hollow specimens at 325°C. It was shown that the ratio of the fatigue life in the PWR water environment to that in air was about 0.3 to 0.4 regardless of the strain range when the applied strain ranges were 0.8% or more. Crack growth rates identified from spacing of striations observed on fractured surfaces were used to demonstrate that the fatigue life reduction in the PWR water environment could be attributed to the crack growth acceleration. The fractured surface observations revealed that crack initiation was enhanced by the PWR water environment. On the other hand, the reduction in the fatigue life was not significant when the strain ranges were 0.5% and 0.44%, and the specimens did not fail when the strain ranges were 0.38% or less. It was deduced that the crack initiation was not enhanced for the relatively small strain range, and the crack growth was not accelerated. Since the fatigue limit of the test material was 0.4% in the strain range in air, it was concluded that the fatigue limit was not reduced in the PWR water environment.

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Section: Discussionmentioning

confidence: 99%

Section: Crack-growth Acceleration Mechanismmentioning

confidence: 99%

Influence of strain range on fatigue life reduction of stainless steel in PWR primary water

Kamaya¹

2017

Fatigue Fract Eng Mat Struct

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“…Similarly for SS 304 LN2 the CGR value stabilised at a value of 4.50 Â 10 À10 ms À1 after 110 h and a corresponding crack growth of approximately 38 lm. The possible reasons for this delay in stabilisation of the CGR are the transition from the TG nature of the crack to IG in the environment during fatigue precracking, the development of stable crack tip solution chemistry or the specimen surface or the crack tip coming to equilibrium with the environment [53,54,47]. The transition of the crack tip from TG to IG is considered to be very important.…”

Section: Cgr Resultsmentioning

confidence: 98%

“…After loading the specimen in the autoclave, fatigue precracking was done in the aqueous environment at the test temperature (288 ± 0.3°C) and pressure (10 MPa). The loading schedule used for fatigue precracking in the environment and the subsequent SCC testing has been used earlier for SCC testing at high temperature and pressure [45,53,54,47]. Triangular loading was applied at different R values and frequency for fatigue precracking in environment.…”

Section: Fatigue Precrackingmentioning

confidence: 99%

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Effect of nitrogen content in sensitised austenitic stainless steel on the crack growth rate in simulated BWR environment

Roychowdhury¹,

Kain²,

Prasad³

2011

Journal of Nuclear Materials

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Deformation Mode and Microstructure on Stress Corrosion Cracking Path and Kinetics in High Temperature Water Environments

Lu¹,

Shoji²,

Yamazaki³

et al. 2012

15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems‐Water Reactors

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The dependency of the crack growth rate on the loading pattern and temperature in stress corrosion cracking of strain-hardened 316L stainless steels in a simulated BWR environment

Cited by 45 publications

References 19 publications

Influence of strain range on fatigue life reduction of stainless steel in PWR primary water

Influence of strain range on fatigue life reduction of stainless steel in PWR primary water

Effect of nitrogen content in sensitised austenitic stainless steel on the crack growth rate in simulated BWR environment

Deformation Mode and Microstructure on Stress Corrosion Cracking Path and Kinetics in High Temperature Water Environments

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