OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 4 2022 a b Fig. 6. Dependence of the deformation of the B2 lattice of AlCoCrFeNi (a) and Al0.6CoCrFeNi (b) alloys in the directions [hkl] depending on the applied stresses during deformation Conclusions 1. Plastic deformation of Al0.6CoCrFeNi and AlCoCrFeNi alloys leads to signifi cant changes in its structure. The change in grain shape is presented in both materials structure. However, traces of partial fracture are observed only in the case of the AlCoCrFeNi alloy. This fact indicates a higher plasticity of the Al0.6CoCrFeNi alloy. 2. Plastic deformation of both alloys leads to signifi cant changes in the shape and positions of the diffraction maxima of the alloys. However, due to the overlap of diffraction maxima, macrostress estimation is possible only for a primitive cubic phase. 3. According to the analysis of the change of diffraction maxima positions, the residual lattice distortions of the B2 phase along the [100] direction in AlCoCrFeNi alloy is 2.5 % at an external load of 2,500 MPa. At the same time, the value of the lattice distortion of the same phase for the Al0.6CoCrFeNi alloy is 5.5 %. This fact indicates the presence of high residual stresses in the structure of the B2 phase of the Al0.6CoCrFeNi alloy. 4. The obtained results indicate that the high plasticity of the Al0.6CoCrFeNi alloy is associated not only with the presence of the fcc phase, but also with the high compliance of the primitive cubic lattice.
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