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

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

doi:10.1016/j.jnucmat.2006.08.004

Cited by 14 publications

(10 citation statements)

References 19 publications

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“…The incident wave length was set © 2011 ISIJ to be 0.656 nm, which provided the scattering vector q (q = 4πsinθ/λ, 2θ is the scattering angle, with neutron wave length of λ) range of 5×10 -3 nm -1 ≤q≤1.99 nm -1 , corresponding to real structure sizes of the order of 3-1 000 nm. 7,14) The calibration to absolute intensity was performed by measurement of the irradiated aluminum standard specimen. Figure 2 shows hydrogen desorption profiles obtained from the TDS for the as-deposited and the 40% rolled specimen.…”

Section: Methodsmentioning

confidence: 99%

“…Small angle neutron scattering (SANS) is an appropriate technique for measuring microstructure in a scale from several nanometers to micrometers for many materials and has advantage of high sensitivity to light elements like hydrogen as neutron interacts with nuclei. [7][8][9] In the present work, SANS and TDS were employed to investigate the hydrogen behavior in an electrodeposited pure iron with annealing or cold rolling. It has been reported that this electrodeposited pure iron sheets show the Lankford (r) value larger than 7.0.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Behavior in an Ultrafine-Grained Electrodeposited Pure Iron

Tomota

Suzuki

et al. 2011

ISIJ Int.

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The behavior of hydrogen in an ultrafine-grained electrodeposited pure iron with Lankford (r) value larger than 7.0 was studied by small angle neutron scattering (SANS) and thermal desorption spectroscopy (TDS). Nano-sized inhomogeneity consisting of hydrogen bubble exists in the deposited specimen. The bubble size increases a little by 673 K annealing and then all the bubbles disappear after 973 K annealing. With rolling at room temperature (RT), the bubble size and number density are found to decrease, which must be caused by the change in the status of hydrogen location during plastic deformation. Crystal rotation and grain coalescence are revealed to occur after rolling deformation from electron backscattered diffraction (EBSD) results.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrogen Behavior in an Ultrafine-Grained Electrodeposited Pure Iron

Tomota

Suzuki

et al. 2011

ISIJ Int.

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“…From the lnI(q) versus lnq plots, several microstructural parameters can be determined at different q regions, i.e., the radius of gyration (R g ) representing "the effective size of the scattering particle" can be determined by the Guinier plot in the lower q region [25][26][27][28][29].…”

Section: Data Analysis On Small Angle Neutron Scatteringmentioning

confidence: 99%

Monitoring of Bainite Transformation Using in Situ Neutron Scattering

Nishijima

Tomota

et al. 2016

Metals

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“…Thus, the HE problem should be taken into consideration. In light water reactors (LWRs), hydrogen can be generated in many ways (Müller et al, 2006;Roychowdhury et al, 2016;Chernov et al, 2017): 1) the corrosion reactions between metal alloys (cladding and other structural materials) and the coolant under the highpressure and -irradiation environment; 2) water radiolysis; 3) hydrogen additions to inhibit water radiolysis and oxidation caused by oxidative radicals; and so on.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Atom and Molecule Adsorptions on FeCrAl (100) Surface: A First-Principle Study

Li¹,

Ma²,

Zhou³

et al. 2021

Front. Energy Res.

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FeCrAl alloys are promising accident-tolerant fuel (ATF) cladding materials for applications in light water reactors (LWRs). Despite the excellent mechanical and antioxidation properties, this series of iron-based alloys has poor hydrogen embrittlement (HE) resistance due to the strong hydrogen uptaking ability. The hydrogen embrittlement effect can cause the degradation and premature failure of the material, and this effect can be enhanced by the high-temperature/high-pressure/high-irradiation environment in reactors. So, the potential danger should be taken seriously. In this paper, we have studied the hydrogen atom and molecule adsorptions on both Fe (100) and FeCrAl (100) surfaces to discover how the hydrogen atom and molecule (H/H2) interact with the Fe and FeCrAl (100) surface in the first place. The results show that there are strong element effects on the FeCrAl surface. The Al atom itself has no interaction with hydrogen. When the Al atom is beside the Fe atom, this Fe atom has a slightly lower interaction with hydrogen. However, the Al atom beside the Cr atom will enhance the hydrogen interaction with this Cr atom. On the other hand, when the Cr atom is beside the Fe atom, these two atoms (Fe–Cr bridge site) can reduce the interactions with H. In addition, when two Cr and two Fe atoms together make a four-fold site (FF site), the two Cr atoms can increase the interaction of the two Fe atoms with H. The element effects discovered can be a good guide for making hydrogen prevention coatings.

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

Cited by 14 publications

References 19 publications

Hydrogen Behavior in an Ultrafine-Grained Electrodeposited Pure Iron

Hydrogen Behavior in an Ultrafine-Grained Electrodeposited Pure Iron

Monitoring of Bainite Transformation Using in Situ Neutron Scattering

Hydrogen Atom and Molecule Adsorptions on FeCrAl (100) Surface: A First-Principle Study

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