The diffusion and trapping of hydrogen in steel

摘要: Abstract The mobility of dissolved hydrogen in an iron lattice having a population extraordinary, or trapping, sites for is analyzed under the assumption local equilibrium between mobile and trapped populations. It shown that at low coverage trapping usual solutions diffusion equations can be used to analyze experimental results effective diffusivity function trap density magnitude depth. In domain which activity not linear fractional occupation population, concept phenomenological becomes non-operational equation must solved with terms sources sinks, as done by McNabb Foster. Values number depth are obtained applying relevant selected data on variety steels without cold work. lead suggestion absence work solid-solid interfaces more important than dislocations loci sites, cold-worked steels, microcrack surfaces trapping.