Small-angle neutron scattering study on the effect of hydrogen in irradiated reactor pressure vessel steels

Ulbricht, A.; Böhmert, J.; Uhlemann, Margitta; Müller, G.

doi:10.1016/j.jnucmat.2004.09.005

Cited by 12 publications

(6 citation statements)

References 28 publications

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“…As such, this can be a powerful tool for hydrogen analysis, such as in protein crystallography and hydride analysis. Neutron techniques have also been employed in examining steels [125,219], where one should expect that with the addition of hydrogen, the total scattering should increase. Indeed, this is observed in small-angle neutron scattering (SANS) data, where charged samples of finely dispersed vanadium carbide precipitates appear to slightly increase the total scattered intensity after hydrogen-1 charging [152], and after subsequent annealing, the scattered intensity is reduced back to the uncharged state.…”

Section: Experimental Techniques To Detect Hydrogen In Metalsmentioning

confidence: 99%

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

et al. 2018

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Hydrogen embrittlement is a complex phenomenon, involving several lengthand timescales, that affects a large class of metals. It can significantly reduce the ductility and load-bearing capacity and cause cracking and catastrophic brittle failures at stresses below the yield stress of susceptible materials. Despite a large research effort in attempting to understand the mechanisms of failure and in developing potential mitigating solutions, hydrogen embrittlement mechanisms are still not completely understood. There are controversial opinions in the literature regarding the underlying mechanisms and related experimental evidence supporting each of these theories. The aim of this paper is to provide a detailed review up to the current state of the art on the effect of hydrogen on the degradation of metals, with a particular focus on steels. Here, we describe the effect of hydrogen in steels from the atomistic to the continuum scale by reporting theoretical evidence supported by quantum calculation and modern experimental characterisation methods, macroscopic effects that influence the mechanical properties of steels and established damaging mechanisms for the embrittlement of steels. Furthermore, we give an insight into current approaches and new mitigation strategies used to design new steels resistant to hydrogen embrittlement.

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Section: Experimental Techniques To Detect Hydrogen In Metalsmentioning

confidence: 99%

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

et al. 2018

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“…In situations with lower H concentrations, a difference in neutron scattering profiles can also be observed between H-charged and uncharged steels. Ulbricht et al, using SANS, reported that the behaviour of H trapped in the microstructural heterogeneities of a pressure vessel steel was mainly correlated with irradiation effects [23]. Recently, a Japanese team at NIMS has applied SANS techniques to the detection of H trapped by niobium carbides (NbC) in ferritic steels [24].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen trapping by VC precipitates and structural defects in a high strength Fe–Mn–C steel studied by small-angle neutron scattering

Malard

Rémy

Scott

et al. 2012

Materials Science and Engineering: A

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 8740To link to this article : Keywords:Small-angle neutron scattering Hydrogen embrittlement Hydrogen trapped by nanoprecipitates a b s t r a c t The trapping of hydrogen by VC precipitates and structural defects in high strength Fe-Mn-C steel was studied by small angle neutron scattering. No interaction between H and V in solid solution has been detected but a significant interaction between H and structural defects introduced by plastic deformation has been measured. This last effect was reversible upon outgassing of the H. Moreover a significant interaction between H and VC precipitates has been measured; 5 ppm wt. of H could be trapped in the precipitates. This is consistent with the homogeneous trapping of H within the precipitates rather than at the precipitate/matrix interface.

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“…This result points to small carbides with coherent or semi-coherent interfaces [25,32]. However, the characteristic radiation defects in the size range of about 1 nm seem to be not effective as hydrogen traps [22]. The SANS results correspond to the results of the tensile tests.…”

Section: Sans Investigationsmentioning

confidence: 59%

“…The SANS measurements show that hydrogen trapping at small microstructural heterogeneities can even be identified if the bulk concentration of hydrogen is not higher than 1-2 wt ppm [22]. Hydrogen charging enhances the nuclear component of the small-angle scattering.…”

Section: Sans Investigationsmentioning

confidence: 95%

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Influence of hydrogen on the toughness of irradiated reactor pressure vessel steels

Müller

Uhlemann²,

Ulbricht

et al. 2006

Journal of Nuclear Materials

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Small-angle neutron scattering study on the effect of hydrogen in irradiated reactor pressure vessel steels

Cited by 12 publications

References 28 publications

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

Understanding and mitigating hydrogen embrittlement of steels: a review of experimental, modelling and design progress from atomistic to continuum

Hydrogen trapping by VC precipitates and structural defects in a high strength Fe–Mn–C steel studied by small-angle neutron scattering

Influence of hydrogen on the toughness of irradiated reactor pressure vessel steels

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