Small-angle neutron scattering measurements were performed on samples which contained dislocation densities of the order of 1011/cm2. These revealed an additional scattering intensity, at 0.2 to 2/nm, after loading the samples with H or D. This observation was consistent with a model in which H or D segregation within the dilated regions of edge dislocations occurred. It corresponded approximately to the precipitation of cylindrical hydrides along the dislocation line.

Interaction of Hydrogen and Deuterium with Dislocations in Palladium as Observed by Small Angle Neutron Scattering. M.Maxelon, A.Pundt, W.Pyckhout-Hintzen, J.Barker, R.Kirchheim: Acta Materialia, 2001, 49[14], 2625-34