Changes, with increasing H content, in the form of the temperature dependences of the internal friction (3kHz), at 90 to 300K, revealed 2 well-defined peaks. These were attributed to stress-assisted rearrangements of H interstitials in the lattices of the bulk metals.

F.A.Lewis, R.A.McNicholl, X.Q.Tong, Y.Sakamoto, A.Biscarini, B.Coluzzi, C.Costa, F.M.Mazzolai: Journal of Alloys and Compounds, 1995, 231, 287-90