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- W4251381858 abstract "In the previous paper, authors have reported that the hydrogen diffusion phenomena in the steel were explanable comparatively well by Fick's law.The present experimental study was undertaken primarily to obtain an improved understanding of the behavior of hydrogen in various structures of steels.Discal specimens for the measurement of the hydrogen occlusion were prepared from a commercial steel S55C. The specimen diameter was 30 mm and its thickness was changed up to 16 mm, as indicated in the previous paper. The carbon content in the steel may affect the hydrogen occlusion. So the structures of the specimens, used in this experiment, were obtained by the heat treatment of the same kind of steel. Hydrogen was charged into the specimen by the cathodically charging method in 5% H2SO4 solution (current density; 0.2 Amp/cm2).Data which were obtained on the effect of the structures were studied using Fick's law, under the assumption that the materials were homogeneous on the average. The apparent diffusion coefficient, D, was computed from: D⋅t/L2=0.05 in which L represents the thickness of the specimens and t represents the period in which the hydrogen content of the specimen increases up to 1/2-maximum or equilibrium hydrogen content of the specimen from the start of the cathodic evolution.Solubility of hydrogen (i.e. equilibrium hydrogen content) in various structures was affected by the condition of the distribution of ferrite and cementite in the steel. The ferrite+pearlite structure showed a maximum solubility of hydrogen, on the other hand, the troostite structure showed a minumum. Moreover, the martensite structure showed the least.As to the diffusion coefficient of hydrogen, a maximum value was found in the ferrite+pearlite structure and a minumum one in the martensite structure." @default.
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- W4251381858 date "1967-01-01" @default.
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- W4251381858 title "Fundamental Research on the Behavior of Hydrogen in Steel (Part 2)" @default.
- W4251381858 doi "https://doi.org/10.2207/qjjws1943.36.1188" @default.
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