It is shown that the model used by Flanagan and Lynch to explain the enhancement of
hydrogen solubility by interaction with dislocation strain fields predicts, when some
mathematical errors are corrected, enhancements that are significantly smaller than those
previously estimated. Moreover, the model is incapable of explaining the observed
temperature dependence of solubility enhancement. This is considered to be due to the
difficulty of treating the enhancement in the vicinity of the dislocation core where the stress …