Effect of the chemical composition on amorphization of titanium-nickelide-based alloys with fast neutrons

The structural state of a Ti 50 Ni 47 Fe 3 single crystal irradiated with fast neutrons ( F = 2.5 × 10 20 cm −2 ) at a temperature of 340 K was studied using thermal neutron diffraction. The alloy of this chemical composition was chosen in searching for a radiation-resistant shape memory material. It is established that this alloy retains its crystalline state after irradiation, whereas the Ti 49 Ni 51 crystal studied previously is completely amorphized after similar irradiation. A detailed analysis of the structural state of the irradiated ternary alloy allowed us to discover the main physical causes of its radiation resistance.