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A general mathematical description of hydrogen diffusion in steels—I. Derivation of diffusion equations from boltzmann-type transport equations
Abstract We first obtain general equations for hydrogen diffusion in steels including effects of trapping phenomena, diffusion obstacles, stresses, temperature and non-uniform solubilities, by usingExpand
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A general mathematical description of hydrogen diffusion in steels—II. Numerical study of permeation and determination of trapping parameters
Abstract The model described in the first part of this paper is applied to the numerical study of permeation. We first study the case of linear diffusion equations, with one type of traps (two typesExpand
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Experimental and numerical study of diffusion and trapping of hydrogen in plastically deformed A508.Cl.3 steel at room temperature
Abstract Hydrogen permeation experiments are performed by the electrochemical method on A508.Cl.3 steel membranes submitted to various stresses. In a first series the stress is kept constant and twoExpand
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Effect of Stacking Disorder on the Orientational Ordering Transition of Solid C60
We determine the nature of stacking disorder in C60 by comparing x-ray powder diffraction patterns to simulated patterns of disordered crystals produced by a Monte Carlo method. Several samples haveExpand
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ACCEPTABILITY VIS-A-VIS FATIGUE DAMAGE OF TUBE SHEETS CONTAINING IRREGULAR PERFORATIONS
One of the acceptability criteria of Nuclear Vessels concerns fatigue behavior under alternating loadings. In the case of a Steam Generator Tube Sheet, the fatigue analysis concerns not only theExpand
CALCULATION OF STRESS INTENSITY FACTORS FOR SURFACE CRACKS IN STEAM GENERATOR TUBE SHEETS
ABSTRACT The evaluation of critical flaw sizes in tube sheets has to overcome difficulties arising in the calculation of stress intensity factors for cracks going through one or several ligaments.Expand
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