Neutron radiography study of hydrogen desorption in technical iron

Beyer, K.; Kannengießer, Thomas; Griesche, Axel; Schillinger, Burkhard

doi:10.1007/s10853-011-5450-7

Cited by 14 publications

(5 citation statements)

References 18 publications

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“…Different materials/metals have different diffusion coefficients depending on the crystallographic direction, e.g., hydrogen in zirconium depending on the diffusion direction in a hexagonal crystal lattice. Neutron radiography experiments, as performed by, e.g., Beyer et al [44,45], shall help to determine precise values for this process. In the case of cladding tubes that consist mainly of zirconium, an additional difficulty is that the material immediately forms a zirconium oxide layer when it is in contact with air.…”

Section: Hydrogen Diffusion In Zirconium Alloysmentioning

confidence: 99%

Investigating Hydrogen in Zirconium Alloys by Means of Neutron Imaging

Weick,

Grosse

2024

Materials

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Neutrons interact with the magnetic moment of the atomic shell of an atom, as is common for X-rays, but mainly they interact directly with the nucleus. Therefore, the atomic number and the related number of electrons does not play a role in the strength of an interaction. Instead, hydrogen that is nearly invisible for X-rays has a higher attenuation for neutrons than most of the metals, e.g., zirconium, and thus would be visible through dark contrast in neutron images. Consequently, neutron imaging is a precise, non-destructive method to quantify the amount of hydrogen in materials with low attenuation. Because nuclear fuel cladding tubes of light water reactors are made of zirconium (98%), the hydrogen amount and distribution in metallic claddings can be investigated. Even hydrogen concentrations smaller than 10 wt.ppm can be determined locally with a spatial resolution of less than 10 μm (with a high-resolution neutron microscope). All in all, neutron imaging is a very fast and precise method for several applications. This article explains the basics of neutron imaging and provides samples of investigation possibilities, e.g., for hydrogen in zirconium alloy cladding tubes or in situ investigations of hydrogen diffusion in metals.

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Section: Hydrogen Diffusion In Zirconium Alloysmentioning

confidence: 99%

Investigating Hydrogen in Zirconium Alloys by Means of Neutron Imaging

Weick,

Grosse

2024

Materials

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“…Analytical techniques for visualizing hydrogen distributions have been actively applied to materials like steel. 4 Currently, the hydrogen mapping in steel with the field of view ranging from mm 2 to cm 2 has been achieved using silver reduction and decoration, 5 hydrogen microprint technique (HMT), 6 scanning Kelvin probe (SKP), 7 scanning Kelvin probe force microscopy (SKPEM), 7 secondary ion mass spectroscopy (SIMS), 8 neutron radiography, [9][10][11] etc. Some of these techniques are limited to surface analysis (silver reduction and decoration, HMT, SKP, and SKPEM) or to qualitative analysis (silver reduction and decoration, HMT, and SKPEM).…”

Section: Introductionmentioning

confidence: 99%

Laser-induced breakdown spectroscopy to obtain quantitative three-dimensional hydrogen mapping in a nickel–metal-hydride battery cathode for interpreting its reaction distribution

Imashuku

Kamimura

Ichitsubo

et al. 2022

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“…The advantages of NR compared to other commonly used methods for measuring hydrogen concentrations (e.g., carrier gas hot extraction) are the non-destructiveness and the high spatial and temporal resolution [ 3 ]. Neutron radiography has already been successfully used to determine diffusion coefficients of hydrogen in metals [ 4 ], to estimate hydrogen concentration and distribution in Zircaloys [ 5 , 6 ] and to measure the effusion behavior of hydrogen in austenitic stainless steel [ 7 ] and technical iron [ 8 ] as function of time and temperature. The three-dimensional distribution of hydrogen in and around blisters in hydrogen-charged technical iron was investigated using neutron tomography [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

On the Genesis of Artifacts in Neutron Transmission Imaging of Hydrogenous Steel Specimens

et al. 2020

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Hydrogen-charged supermartensitic steel samples were used to systematically investigate imaging artifacts in neutron radiography. Cadmium stencils were placed around the samples to shield the scintillator from excessive neutron radiation and to investigate the influence of the backlight effect. The contribution of scattered neutrons to the total detected intensity was investigated by additionally varying the sample-detector distance and applying a functional correlation between distance and intensity. Furthermore, the influence of the surface roughness on the edge effect due to refraction was investigated.

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Neutron radiography study of hydrogen desorption in technical iron

Cited by 14 publications

References 18 publications

Investigating Hydrogen in Zirconium Alloys by Means of Neutron Imaging

Investigating Hydrogen in Zirconium Alloys by Means of Neutron Imaging

Laser-induced breakdown spectroscopy to obtain quantitative three-dimensional hydrogen mapping in a nickel–metal-hydride battery cathode for interpreting its reaction distribution

On the Genesis of Artifacts in Neutron Transmission Imaging of Hydrogenous Steel Specimens

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