Observation of hydrogen effects on fatigue crack growth behaviour in an 18Cr-8Ni austenitic stainless steel

Oda, Yasuji; Noguchi, Hiroshi

doi:10.1007/s10704-004-8142-3

Cited by 46 publications

(30 citation statements)

References 17 publications

(18 reference statements)

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“…At first, the FCG tests were carried out until the FCG rate reached a certain value, to analyze the hydrogen distribution near the tip of a crack accelerated due to the localization of slip at a crack tip by hydrogen (1) . The FCG rate was determined as 0.8×10 -6 m/cycle.…”

Section: Secondary Ion Mass Spectrometry (Sims)mentioning

confidence: 99%

“…During the test, FCG behavior was in-situ observed. Then the test was stopped when a crack was growing in a ductile manner, not in a brittle manner (1), (27) . Secondary, an SIMS sample including a fatigue crack tip was cut out from the specimen.…”

Section: Secondary Ion Mass Spectrometry (Sims)mentioning

confidence: 99%

“…In order to ensure the safety of components exposed to hydrogen for a long time, it is important to clarify the hydrogen effects on fatigue strength. The authors investigated the effects of a hydrogen gas environment on the fatigue crack growth (FCG) of austenitic stainless steels (1)~ (3) . In the previous studies, it was considered that the hydrogen effect on FCG acceleration in type 304 stainless steel is greater than that in type 316L stainless steel, of which the stability of the γ phase is higher than that of type 304 (3) and the cause of the FCG acceleration is the localization of slip at a fatigue crack tip (1) .…”

Section: Introductionmentioning

confidence: 99%

“…The authors investigated the effects of a hydrogen gas environment on the fatigue crack growth (FCG) of austenitic stainless steels (1)~ (3) . In the previous studies, it was considered that the hydrogen effect on FCG acceleration in type 304 stainless steel is greater than that in type 316L stainless steel, of which the stability of the γ phase is higher than that of type 304 (3) and the cause of the FCG acceleration is the localization of slip at a fatigue crack tip (1) . Hydrogen sensitivity of austenitic stainless steels in the FCG process is considered to be strongly related to the strain-induced α' martensite as is the case with a static tensile test (4) .…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Local Hydrogen Distribution Around Fatigue Crack Tip of a Type 304 Stainless Steel with Secondary Ion Mass Spectrometry and Hydrogen Micro-Print Technique

Kawamoto

Oda

Noguchi

et al. 2009

JMMP

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In order to establish an appropriate method for measuring the local hydrogen content distribution around a fatigue crack tip in austenitic stainless steels, secondary ion mass spectrometry (SIMS) and the hydrogen micro-print technique (HMPT) were applied to a fatigue crack in a type 304 stainless steel fatigued in a hydrogen gas environment. The main results in this study are as follows. In the SIMS method, it is visualized that a high content of hydrogen exists in the plastic zone at a fatigue crack tip propagated in hydrogen gas, compared to that on a smooth area fatigued in hydrogen, though there is a measurement error based on false detection due to the edge effect regarding hydrogen in water vapor on the fatigue crack surface. On the other hand, hydrogen in the plastic zone is difficult to detect by HMPT. This is attributed to the difficulty for hydrogen atoms to be emitted from the sample in this case. To detect hydrogen, it is necessary to sputter the atoms forcibly. In addition, it is considered that to analyze the local hydrogen distribution around a fatigue crack tip with SIMS not only qualitatively but also quantitatively, reduction of the false detection due to the edge effect is necessary.

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Section: Secondary Ion Mass Spectrometry (Sims)mentioning

confidence: 99%

Section: Secondary Ion Mass Spectrometry (Sims)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of Local Hydrogen Distribution Around Fatigue Crack Tip of a Type 304 Stainless Steel with Secondary Ion Mass Spectrometry and Hydrogen Micro-Print Technique

Kawamoto

Oda

Noguchi

et al. 2009

JMMP

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“…The dislocation cells and wall-channels are observed near the crack tip of fatigued 316 stainless steels. [9][10][11][12] The formation of dislocation structure plays an important role in the accumulation of plastic strain during cyclic loading. When dislocation tangles are saturated, dislocations would make planar slip which could prompt the initiation and growth of fatigue crack.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Fatigue Behavior of Cold-Worked 304L Stainless Steel in a Simulated BWR Coolant Environment

2009

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Fatigue crack growth tests were performed to evaluate the effect of cold work on the fatigue behavior of 304L stainless steel in the ambient air at room temperature and 300 C and in a simulated BWR coolant environment, respectively. The fatigue crack growth rates (FCGRs) for the as-received (AR) and cold-rolled specimens at room temperature were in the same range and the FCGRs obtained at 300 C in air were higher than those at room temperature. In addition, the FCGRs for the AR specimens were higher at 300 C in air compared with those for the coldrolled. The specimens tested in the water environment at 300 C showed higher corrosion fatigue crack growth rates (CFCGRs) relative to those measured in air at room temperature and 300 C. Local quasi-cleavages could account for the observation that the FCGRs in air at 300 C were faster than at room temperature. The dominant fracture features of quasi-cleavages, along with corrosion products, were observed with all the 304L specimens tested in the simulated BWR water environment, which could be related to the higher crack growth rates in the corrosive environment.

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Numerical modeling of hydrogen diffusion in structural steels under cathodic overprotection and its effects on fatigue crack propagation

Carrasco¹,

Diniz

Barbosa

et al. 2012

Materialwissenschaft Werkst

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This paper presents a numerical simulation of the effect of hydrogen atomic diffusion on fatigue crack propagation on structural steels. The simulation was performed with a specimen type CT of API 5CT P110 steel, loaded in the tensile opening mode, in plane strain state and under the effects of a cyclic mechanical load and the hydrogen concentration at the crack tip. As hydrogen source, a cathodic protection system was considered, commonly used in subsea pipelines. The equations of evolution of variables at the crack tip form a non-linear system of ordinary differential equations that was solved by means of the 4th order Runge-Kutta method. The solid-solid diffusion through the lattice ahead of the crack tip was simulated using the finite difference method. The simulations results show that under these conditions, the fatigue crack evolution process is enhanced by the hydrogen presence in the material, and that the start time of the crack propagation decreases as its concentration increases. These results show good correlation and consistency with macroscopic observations, providing a better understanding of hydrogen embrittlement in fatigue crack propagation processes in structural steels.

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Observation of hydrogen effects on fatigue crack growth behaviour in an 18Cr-8Ni austenitic stainless steel

Cited by 46 publications

References 17 publications

Investigation of Local Hydrogen Distribution Around Fatigue Crack Tip of a Type 304 Stainless Steel with Secondary Ion Mass Spectrometry and Hydrogen Micro-Print Technique

Investigation of Local Hydrogen Distribution Around Fatigue Crack Tip of a Type 304 Stainless Steel with Secondary Ion Mass Spectrometry and Hydrogen Micro-Print Technique

Corrosion Fatigue Behavior of Cold-Worked 304L Stainless Steel in a Simulated BWR Coolant Environment

Numerical modeling of hydrogen diffusion in structural steels under cathodic overprotection and its effects on fatigue crack propagation

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