Recent progress of R&amp;D activities on reduced activation ferritic/martensitic steel (CLF-1)

Liao, Hongbin; Yang, Guoping; Feng, Yongjin; Wang, Suhao; Feng, Kai-Ming

doi:10.1016/j.fusengdes.2019.06.008

Cited by 54 publications

(12 citation statements)

References 9 publications

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“…The substrate material chosen in this experiment was CLF-1 steel (8.5% Cr, 1.5% W, 0.3% V, 0.5% Mn, 0.08% Ta and the balance Fe), which has been researched and developed by the Southwestern Institute of Physics (SWIP) [3]. The disc specimens with a diameter of 12 mm and a thickness of 0.5 mm are used in deuterium permeation experiments and another shape of the disc specimens with a diameter of 29 mm and a thickness of 0.5 mm for electrochemical hydrogen permeation experiments.…”

Section: Materials and Coating Preparationmentioning

confidence: 99%

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Hydrogen Isotope Permeation Behavior of AlCrFeTiNb, AlCrMoNbZr and AlCrFeMoTi High-Entropy Alloys Coatings

et al. 2022

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The hydrogen permeation behavior of novel AlCrFeTiNb, AlCrMoNbZr and AlCrFeMoTi high-entropy alloy (HEA) coatings were investigated. The hydrogen permeability of HEA coatings prepared by magnetron sputtering technology were tested using gas-driven deuterium permeation and electrochemical hydrogen permeation methods. The gas-driven permeation results show that the deuterium permeation resistance of the AlCrFeTiNb coating is the worst because of the unstable structure at a high temperature. Scanning electron microscope (SEM) and X-Ray Diffraction (XRD) analysis proved a loose surface morphology of the AlCrFeTiNb coating and demonstrated the formation of iron-based oxides after deuterium permeation experiments. A high content of iron in HEA coating is disadvantageous for improving the hydrogen permeability. Differently, electrochemical hydrogen permeation reveals that the AlCrMoNbZr coating could resist hydrogen permeation better in a corrosive environment (0.2 mol/L KOH solution). The AlCrFeMoTi coating was peeled off after an electrochemical hydrogen permeation test due to the poor corrosion resistance. The hydrogen behavior of HEA coatings was discussed in detail. Our study provides a promising thought on hydrogen permeation of HEA coatings.

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Section: Materials and Coating Preparationmentioning

confidence: 99%

“…Among oxide coatings (Cr2O3, Y2O3, Al2O3, TiO2, Er2O3 and SiO2, etc. ), α-alumina shows great potential [1], but the phase formation temperature can reach 1200 °C [2], which will degrade the mechanical properties of the substrate materials [3,4]. For non-oxide coatings (TiN, TiC and SiC, etc.)…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Isotope Permeation Behavior of AlCrFeTiNb, AlCrMoNbZr and AlCrFeMoTi High-Entropy Alloys Coatings

et al. 2022

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“…Reduced activation ferritic/martensitic (RAFM) steel was used as a substrate. The sample size of CLF−1 steel [15] was 12 mm in diameter with a thickness of 0.5 mm. The details of the substrate pre-treatment procedure are described in Ref.…”

Section: Sample Preparationmentioning

confidence: 99%

Study on Deuterium Permeation Behavior of Palladium Films Prepared by Magnetron Sputtering Method

et al. 2022

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Pre-depositing a Pd film is crucial for accurately acquiring the hydrogen permeability of metal materials, as it permits the production of ultra-pure hydrogen. However, the microstructure of Pd film and its effect on the hydrogen isotope permeation behavior of substrate materials have been neglected. In this study, Pd films were deposited on China Low-activation Ferritic (CLF−1) steel by magnetron sputtering. The effect of sputtering pressure on the microstructure and deuterium permeation behavior of Pd films at temperatures of 550−650 °C is presented. SEM results demonstrated that the films had a columnar crystal structure with a thickness of 0.6 ± 0.2 μm. The gas-driven permeation results revealed that the deuterium ion current intensity of the coated CLF−1 sample was at least three times lower than that of uncoated CLF−1 steel, which was influenced by the combined effect of oxygen and surface cracks. Oxygen could not be excluded from the films at a sputtering pressure of 10−3 Pa order of magnitude. It was also found that the films cracked during deuterium permeation experiments, which affected the deuterium permeation behavior. Films with large surface coverage and small grain sizes exhibited better cracking resistance. Our study provides promising insights into the hydrogen permeability of Pd films.

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“…All these methods mainly depend on the chemical composition and the heat treatment of the steels. The heat treatment processes of HT-9 and other ferritic/martensitic steels have been studied by many researchers [12][13][14][15][16][17][18][19][20]. From the recent research on the heat treatment effects, the results show that the tempering temperature is the most important factor affecting the yield strength and elongation of HT-9 steel [21].…”

Section: Introductionmentioning

confidence: 99%

Effects of Silicon Content and Tempering Temperature on the Microstructural Evolution and Mechanical Properties of HT-9 Steels

Liu

Hao

et al. 2020

Materials

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Two kinds of experimental ferritic/martensitic steels (HT-9) with different Si contents were designed for the fourth-generation advanced nuclear reactor cladding material. The effects of Si content and tempering temperature on microstructural evolution and mechanical properties of these HT-9 steel were studied. The microstructure of experimental steels after quenching and tempering were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM); the mechanical properties were investigated by means of tensile test, Charpy impact test, and hardness test. The microscopic mechanism of how the microstructural evolution influences mechanical properties was also discussed. Both XRD and TEM results showed that no residual austenite was detected after heat treatment. The results of mechanical tests showed that the yield strength, tensile strength, and plasticity of the experimental steels with 0.42% (% in mass) Si are higher than that with 0.19% Si, whereas hardness and toughness did not change much; when tempered at 760 °C, the strength and hardness of the experimental steels decreased slightly compared with those tempered at 710 °C, whereas plasticity and toughness increased. Further analysis showed that after quenching at 1050 °C for 1 h and tempering at 760 °C for 1.5 h, the comprehensive mechanical properties of the 0.42% Si experimental steel are the best compared with other experimental steels.

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Recent progress of R&D activities on reduced activation ferritic/martensitic steel (CLF-1)

Cited by 54 publications

References 9 publications

Hydrogen Isotope Permeation Behavior of AlCrFeTiNb, AlCrMoNbZr and AlCrFeMoTi High-Entropy Alloys Coatings

Hydrogen Isotope Permeation Behavior of AlCrFeTiNb, AlCrMoNbZr and AlCrFeMoTi High-Entropy Alloys Coatings

Study on Deuterium Permeation Behavior of Palladium Films Prepared by Magnetron Sputtering Method

Effects of Silicon Content and Tempering Temperature on the Microstructural Evolution and Mechanical Properties of HT-9 Steels

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