Hydrogen transport and trapping in ODS-EUROFER

Esteban, G.A.; Bandrés, Alberto; Legarda, F.; Lindau, R.

doi:10.1016/j.fusengdes.2007.02.002

Cited by 51 publications

(34 citation statements)

References 11 publications

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“…The permeability coefficient was determined to be P (400 • C) = 1.0 × 10 13 H 2 /(m s Pa 0.5 ) and the hydrogen solubility K s (400 • C) = 1.56 × 10 17 H/(cm 3 Pa 0.5 ). Obtained parameters are in very good agreement with published transport parameters for hydrogen and deuterium in Eurofer [9]. The permeation fluxes through 5 investigated samples evidently show that the Be films have a substantially lower permeability compared to the substrate.…”

Section: Discussionsupporting

confidence: 83%

“…The steel was supplied in the form of a 100-mm diameter bar by Forschungszentrum Karlsruhe GmbH, Germany, in the normalized plus tempered condition, i.e., 980 • C/110 min plus tempering at 740 • C/220 min/air-cooled. The reason for selecting this special grade of steel is its well characterized interaction with hydrogen [9]. This steel will be used for the future fusion reactor DEMO.…”

Section: Sample Preparation and Initial Characterizationmentioning

confidence: 99%

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Hydrogen permeability of beryllium films prepared by the thermionic vacuum arc method

Nemanič

Zajec

Žumer

et al. 2011

Fusion Engineering and Design

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Section: Discussionsupporting

confidence: 83%

Section: Sample Preparation and Initial Characterizationmentioning

confidence: 99%

Hydrogen permeability of beryllium films prepared by the thermionic vacuum arc method

Nemanič

Zajec

Žumer

et al. 2011

Fusion Engineering and Design

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“…Table 3 However, the variation of <C> calculated from equation (8) shows that it relies on the charging conditions, temperature and some more parameters. It has already been reported that an oxide layer formed on the exit side of the membrane has a real influence on solubility [6,7,27] m²/s for pure Armco iron [42] to D 0app =1.33x10 -6 m²/s for quenched martensite [46]. The activation energy of diffusion process has been reported to vary from E D =0.20eV for pure Armco iron [42] to E D =0.36 eV for quenched martensite [46], or E D =0.35eV…”

Section: Influence Of Temperature On Diffusion Processesmentioning

confidence: 98%

Study of the hydrogen diffusion and segregation into Fe–C–Mo martensitic HSLA steel using electrochemical permeation test

Frappart

Feaugas

Creus

et al. 2010

Journal of Physics and Chemistry of Solids

167

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Diffusion and trapping mechanisms are studied in order to improve Hydrogen Embrittlement (HE) resistance of high yield strength steels. Investigations were carried on Fe-C-Mo model steel with a quenched and tempered martensitic microstructure. Hydrogen diffusion was studied by using the electrochemical permeation technique.The influence of the charging current densities in 1M H 2 SO 4 at ambient temperature shows a relation between the apparent diffusion coefficient D app and the apparent subsurface concentration of hydrogen C 0app . Two domains can be separated and are mainly associated with a competition between two distinct processes: hydrogen trapping and hydrogen diffusion. These results are correlated to the quantities of reversible and irreversible traps into the membrane. Moreover, the experimental results revealed that the apparent diffusion coefficient increases and the total amount of trapped hydrogen decreases with temperature. The activation energy of diffusion processes (0.26eV) and trapping processes (0.58eV) are supposed to be respectively affiliated with lattice diffusion and with trapping on incidental dislocations and/or on martensitic lath interfaces due to misorientations (geometric necessary dislocations).

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“…In the case of the DS-GlidCop ® Al25 alloy, the same effect can be attributed to the hydrogen inventory trapped in the nanosized Al 2 O 3 particles. Furthermore, this phenomenon has been www.intechopen.com experimentally identified in other kind of materials like oxide dispersion strengthened (ODS) reduced activation ferritic martensitic (RAFM) steels where nanoparticles of yttria Y 2 O 3 provoked an analogous effect (Esteban et al, 2007).…”

Section: Resultsmentioning

confidence: 84%