Effects of hydrogen water chemistry on corrosion fatigue behavior of cold-worked 304L stainless steel in simulated BWR coolant environments

Chiang, M.F.; Young, M.C.; Huang, Jeng‐Yi

doi:10.1016/j.jnucmat.2011.01.035

Cited by 12 publications

(1 citation statement)

References 25 publications

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“…Austenite stainless steels (SSs) have been widely used in pressurized water reactor (PWR) nuclear power plants due to their outstanding corrosion resistance, stability, and mechanical properties [1][2][3][4]. Austenite stainless steels such as 304L and 316L SSs are often used as the primary coolant pipe in PWR servicing in high-temperature and high-pressure water environments and at a complex stress state [5][6][7]. It often suffers constant tensile stress during stable operation and cyclic fatigue stress during startup, shutdown, and the instability condition of nuclear power plants.…”

Section: Introductionmentioning

confidence: 99%

Study on Corrosion Fatigue Behavior of 304L Austenite Stainless Steel in 325 °C High-Temperature Water Environment

Wu,

Liu,

et al. 2024

Metals

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The fatigue crack growth behavior of 304L austenitic stainless steel (SS) in a 325 °C high-temperature and high-pressure water environment were investigated by a corrosion fatigue test system, by electron back scatter diffraction (EBSD), and by a transmission electron microscope (TEM). The experimental results indicated that the crack growth rate (CGR) of 304L SS increases with increasing the stress intensity factor, stress level, and fatigue frequency (f). Compared to dissolved hydrogen (DH) in a high-temperature water environment, dissolved oxygen (DO) significantly enhances the CGR by about an order of magnitude higher. The crack tip of 304L SS after the corrosion fatigue test under higher stress levels is sharper, with more secondary cracks on the fracture surface, while the crack tip under lower stress levels is blunter with relatively fewer secondary cracks. The oxidation behavior at the crack tip was analyzed under different loading and water chemistry conditions, and a related effect on the crack tip and CGR was clarified.

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Section: Introductionmentioning

confidence: 99%

Study on Corrosion Fatigue Behavior of 304L Austenite Stainless Steel in 325 °C High-Temperature Water Environment

Wu,

Liu,

et al. 2024

Metals

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Effect of sigma phase on the low cycle fatigue property of Z3CN20.09M cast duplex stainless steel in high temperature water

Yang

Wang

2014

Materials & Corrosion

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The effect of sigma phase on the low cycle fatigue (LCF) property of Z3CN20.09M cast duplex stainless steel (DSS) was investigated by corrosion fatigue cracking test system and scanning electron microscopy (SEM). The results showed that the fatigue lives of the aged Z3CN20.09M DSS specimens decreased with the increase of aging time. The Cr‐depleted zones around the sigma phase are sensitive to pitting and preferential to forming fatigue cracks. Moreover, the precipitation of sigma phase was also found to degrade markedly the fatigue property of the DSS as it leads to fracture of ferrite during fatigue tests.

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Effect of grain size on the low cycle fatigue behavior of 316LN stainless steel in high temperature water

Fang

et al. 2017

Materials and Corrosion

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The effects of grain size on the fatigue life and crack initiation mechanism of 316LN stainless steel (SS) in 320 °C water environment were investigated by corrosion fatigue cracking test system, scanning electron microscopy (SEM), electron backscatter diffraction technique (EBSD), and transmission electron microscopy (TEM). The grain sizes of the specimens were controlled to be 30, 80, and 210 µm, respectively, by different solution treatments. The experimental results indicated that the specimens with fine grains own the longest fatigue lives than those with intermediate and coarse grains. The fatigue stress amplitudes of the specimens increased with the grain refinement, although the fatigue lives of the specimens with intermediate and coarse grains were similar. The improvement of fatigue life for the specimens with fine grains was attributed to the decreasing of the crack initiation induced by refined crystalline strengthening. Moreover, the dislocation structures of the specimens with fine grains consisted of walls and cells. While planar slip bands were found in the specimens with intermediate and coarse grains.

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Effects of hydrogen water chemistry on corrosion fatigue behavior of cold-worked 304L stainless steel in simulated BWR coolant environments

Cited by 12 publications

References 25 publications

Study on Corrosion Fatigue Behavior of 304L Austenite Stainless Steel in 325 °C High-Temperature Water Environment

Study on Corrosion Fatigue Behavior of 304L Austenite Stainless Steel in 325 °C High-Temperature Water Environment

Effect of sigma phase on the low cycle fatigue property of Z3CN20.09M cast duplex stainless steel in high temperature water

Effect of grain size on the low cycle fatigue behavior of 316LN stainless steel in high temperature water

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