Two types of thin monocrystal, which had a common tensile orientation but differing surface orientations (so that strains were carried mainly by screw or edge dislocations) were tested in tension in vacuum and air, and the elongations were measured. It was concluded that environmental embrittlement of this intermetallic compound was controlled by interactions between atomic H and edge dislocations.

H.Saka, T.Nishizaki: Philosophical Magazine A, 1996, 74[4], 1173-9