Evaluation of hydrogen-trap binding enthalpy l

Iino, Makio

doi:10.1007/bf02646139

Cited by 26 publications

(18 citation statements)

References 5 publications

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“…Thus, in order to explain the thermal desorption spectra, the activation process of trapping and detrapping and the diffusion process are combined in the mass conservation equation for a single type of trap 7) and two types of traps. 8) The formulation used in these works is similar to that of McNabb and Foster.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study on the Validity of the Local Equilibrium Hypothesis in Modeling Hydrogen Thermal Desorption Spectra

Ebihara¹,

Kaburaki²,

Suzudo³

et al. 2009

ISIJ Int.

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We present a systematic benchmark study on different numerical models for analyzing hydrogen thermal desorption spectra, by focusing on the adoption of the local equilibrium hypothesis in these models. We find that the direct numerical method of the full set of the extended mass conservation equations is only able to predict the experimental behavior of thermal desorption spectra for pure iron in the thin specimen limit, while other models incorporating the local equilibrium hypothesis fail to predict this behavior.

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Section: Introductionmentioning

confidence: 99%

A Numerical Study on the Validity of the Local Equilibrium Hypothesis in Modeling Hydrogen Thermal Desorption Spectra

Ebihara¹,

Kaburaki²,

Suzudo³

et al. 2009

ISIJ Int.

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“…Theoretical analyses [10][11][12][13][14][15][16][17] of the hydrogen desorption profiles have been reported for decades in order to evaluate the amount of defects in alloys. Most of the reports are based on the equation of McNabb and Foster 18) and/or the Oriani's local equilibrium theory.…”

Section: Modeling Of Hydrogen Thermal Desorption Profile Of Pure Ironmentioning

confidence: 99%

“…He estimated the amount of trapping sites and binding energy between hydrogen and trapping sites as well as the hydrogen diffusion constant using his theory. In the analysis of hydrogen desorption profiles, some papers 10,11,15,16) adopted the equation of McNabb and Foster, and others 14,15,17) used the Oriani's theory. These analyses are reviewed in detail by Turnbull. 16) The McNabb and Foster's equation was also used for estimating the amount of defects trapping hydrogen.…”

Section: Modeling Of Hydrogen Thermal Desorption Profile Of Pure Ironmentioning

confidence: 99%

Modeling of Hydrogen Thermal Desorption Profile of Pure Iron and Eutectoid Steel

et al. 2007

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We have developed a numerical model to simulate the hydrogen desorption profiles for pure iron and eutectoid steel, which is obtained in thermal desorption analysis (TDA). Our model incorporates the equation of McNabb and Foster without the hydrogen diffusion term combined with the Oriani's local equilibrium theory. It is found that the present numerical model successfully simulates the hydrogen desorption profile both for pure iron and for eutectoid steel. We further verify the model by discussing the trapping site concentration and the effect of hydrogen diffusion.

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“…[1] It should also be noted that linearity of the relationship has been shown to be valid for a range of values of trap parameters broad enough for substantially all the possible conditions of hydrogen diffusion in steel to be covered. The assumed values of activation enthalpy, H L , and pre-exponential factor, D 0 , for lattice hydrogen diffusion are H L ϭ 0.082 eV (1900 cal/mol) and D 0 ϭ 0.78 ⅐ 10 Ϫ3 cm 2 /s.…”

Section: Introductionmentioning

confidence: 97%

“…IN previous work, [1] it is theoretically predicted that hydrogen-trap binding enthalpy, H B , is substantially linearly related to the temperature of hydrogen release peak, T P , in hydrogen evolution experiments as…”

Section: Introductionmentioning

confidence: 97%