Resistivity damage rates, determined during low-temperature electron irradiation in the energy range of 0.3 to 2.5MeV, were used to evaluate the displacement threshold energies of nickel and aluminium in pure nickel, short-range ordered Ni-6at%Al and Ni-10at%Al solid solutions, and in long-range ordered Ni3Al. These parameters were deduced from a comparison of normalized experimental displacement cross-section variations, as a function of electron energy, with theoretical curves based upon a displacement model for diatomic materials. The threshold energy of nickel was about the same in the three investigated alloys (TdNi = 23eV) as in the pure metal. The threshold energy of aluminium TdAl was of the same order as TdNi in the Ni(Al) solid solutions (22eV) but it was larger in the long-range ordered Ni3Al: 30eV.

Displacement Threshold Energies in Ni(Al) Solid Solutions and in Ni3Al. Dimitrov, C., Sitaud, B., Dimitrov, O.: Journal of Nuclear Materials, 1994, 208[1-2], 53-60