DEFORMATION EFFECT ON THE STRUCTURAL AND ENERGY CHARACTERISTICS OF INTERMETALLIC NiAl, Ni<sub>2</sub>AlNb AND 50%Ni-49%Al-1%Nb
Bi-component alloys, depending on the concentration of the components upon transition from a disordered state on the basis of FCC lattice, can be converted into a large set of superstructures based on FCC, HCP, BCC, rhombic crystal lattices and others. In each case, similar phase transformations are accompanied by changes in the crystal structure symmetry, the anisotropy manifestation physical and mechanical properties of the materials. Such a property may be considered at the nanoscale as an element of shape-memory, or physical properties memory. We used the Monte Carlo method for research structural and phase transformations, as in previous studies [1-11]. We took ordered alloys with different superstructures (B2 for NiAl and L2<sub>1</sub> for Ni<sub>2</sub>AlNb) and made all-round deformation tension and compression. The hysteresis loop width increases with increasing percent strain during tensile strain. The hysteresis loop width decreases with increasing percent strain during compressive strain. The deformation leads to an increase in the average configurational energy, no noticeable changes in the structural characteristics occur, which does not indicate the presence of possible superstructural rearrangements for the NiAl and Ni<sub>2</sub>AlNb. All types of deformation tension-compression for examined alloys leads to higher values of energy. These results are in good agreement with experimental data.