Investigation of crack propagation resistance of 304L, 316L and 316L(N) austenitic steels in liquid sodium

Barkia, Bassem; Courouau, Jean-Louis; Perrin, E.; Lorentz, V.; Rivollier, Matthieu; Robin, R.; Nicolas, L.; Cabet, C.; Auger, T.

doi:10.1016/j.jnucmat.2018.04.036

Cited by 20 publications

(10 citation statements)

References 24 publications

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“…Based on these stress-strain curves, the main difference between samples before and after hydrogen embrittlement (HE) test was the type of failure. Sample which did not undergo hydrogen embrittlement test experienced ductile failure, while the HE samples experienced brittle fracture, as deduced by the sudden, drastic decrease in stress after a strain similar with previous studies [21][22][23][24][25][26]. The tensile strain at maximum load of stainless steel before hydrogen embrittlement test (most ductile) is 50.29% while the tensile strain of stainless steel after one day immersion test (most brittle) is 19.78%.…”

Section: Hardness Testsupporting

confidence: 84%

Hydrogen Embrittlement of 316L Stainless Steels Exposed in 1.0M Hydrochloric Acid Solution

Hadi¹,

Saud²,

Hamzah³

et al. 2019

ACSM

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This paper aims to determine the different sources of hydrogen that cause hydrogen embrittlement in ferrous materials. The 316L stainless steel was selected as the research object, and subjected to immersion and electrochemical tests in 1.0M HCl solution. The hardness and tensile strength of the test samples were measured before and after hydrogen embrittlement. The hydrogen, which exists in the form of hydrides, was detected through Xray diffractometry (XRD), while the fracture profile and microstructure of the samples were observed through optical microscopy and scanning electron microscopy (SEM), respectively. The results show that the hydrogen ions diffused into the surface of the steel, forming iron hydrides. In this way, the hardness of the steel was enhanced, and brittle failure occurred under tensile load; the amount of hydrides and the probability of hydrogen embrittlement increase with the immersion time in the acid solution; the sample immersed in 1.0M HCl for one day presented the most prominent hydrogen embrittlement, i.e. the highest hardness and lowest ductility. The research results provide insights into the occurrence of hydrogen embrittlement in ferrous materials.

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Section: Hardness Testsupporting

confidence: 84%

Hydrogen Embrittlement of 316L Stainless Steels Exposed in 1.0M Hydrochloric Acid Solution

Hadi¹,

Saud²,

Hamzah³

et al. 2019

ACSM

View full text Add to dashboard Cite

show abstract

“…With the exception of 14Cr ODS steels, which showed a pronounced LME effect, the 9Cr and 18Cr ODS steels did not exhibit evident signs of LME after short-term exposures to liquid Na [439]. By contrast, AuSS were observed to be much less sensitive to LME in contact with liquid Na, even though a small amount of intergranular and/or cleavage fracture features were occasionally observed [439][440][441][442][443]. Interestingly, the plastic straining-induced phase transformation of austenite (γ, fcc) to ferrite (α, bcc) increased the susceptibility of AuSS to LME caused by liquid Na, as reported by Barkia et al [441,443].…”

Section: New Understandings Of Lme In the Past Two Decadesmentioning

confidence: 99%

“…By contrast, AuSS were observed to be much less sensitive to LME in contact with liquid Na, even though a small amount of intergranular and/or cleavage fracture features were occasionally observed [439][440][441][442][443]. Interestingly, the plastic straining-induced phase transformation of austenite (γ, fcc) to ferrite (α, bcc) increased the susceptibility of AuSS to LME caused by liquid Na, as reported by Barkia et al [441,443]. This suggests that differences in the LME susceptibilities of ferritic, F/ M steels and AuSS may be primarily associated with their different crystal lattices (i.e., fcc vs. bcc steels).…”

Section: New Understandings Of Lme In the Past Two Decadesmentioning

confidence: 99%

Environmental degradation of structural materials in liquid lead- and lead-bismuth eutectic-cooled reactors

Gong

Short

Auger

et al. 2022

Progress in Materials Science

170

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“…The detection system can detect neutron signals emitted by delayed neutron precursors. The oxide-sodium reaction (OSR) happens [9]. • Wide rupture: The oxygen atoms feeding the oxidesodium reaction mainly come from the sodium coolant, which continuously flows along the fuel oxide at the rupture location.…”

Section: A Evolution Of the Fuel Pin Failurementioning

confidence: 99%

Gas detection in sodium cooled fast reactors: determination of a transfer function

2021

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To keep the dependability of Sodium Cooled Fast Reactor, the “clean sodium concept” is demanded, which means that the sodium is free from contamination. The release of fission products is searched for by a contamination measuring system. We need to have a comprehensive description of cladding failures and the detection of contamination, including the failure occurrence on the fuel pin, the transfer process through the sodium and cover gas, the measurement efficiency, etc. We aim to identify the important parameters of physical phenomena, with modelling and simulations based on the return of experiments from past reactors such as PHENIX. There have been a total of 15 open pin failures in PHENIX reactor. Through studying these detected signals, we can get a better physical explanation and description of the evolution of failures. The detection system is related to different stages of the evolution of fuel pin, with different types of fission products, various release mechanism and physical properties. During the evolution of the failed fuel pin, gaseous fission products is released on the first stage of failure and the gas detection system is aimed for the gaseous fission products monitoring. We proposed a quantitative modeling of transfer function to describe the time broadening of the gas release from the fuel pin to the detector. The result matches well with PHENIX experiment data, with the same order of magnitude of the time broadening and the same shape of exponential decreasing. A determination of the transfer function of this gas detection system is validated in this paper.

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Investigation of crack propagation resistance of 304L, 316L and 316L(N) austenitic steels in liquid sodium

Cited by 20 publications

References 24 publications

Hydrogen Embrittlement of 316L Stainless Steels Exposed in 1.0M Hydrochloric Acid Solution

Hydrogen Embrittlement of 316L Stainless Steels Exposed in 1.0M Hydrochloric Acid Solution

Environmental degradation of structural materials in liquid lead- and lead-bismuth eutectic-cooled reactors

Gas detection in sodium cooled fast reactors: determination of a transfer function

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