International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

XRD, SEM-EDS and FTIR were used for studying stable products of nuclear reactions of “branching decay” in LiF exposed to  intensive 1.17 and 1.33 MeV 60Co y-radiation to dose 109 R and mixed neutron+y-fluxes of WWR to fluencies 1017-1018cm-2: 19F9 + y -> 11B5 + 7Li3 + 1H1 or -> 16О8 + 3Т1 and 19F9 + 1n0 -> 20Ne10 or ->210B5 in addition to the known 6Li(n,a)3T. The main part of impact radiation is absorbed in micron subsurface layer, so the following radiation induced structure-phase transformations are highly inhomogeneous: hillocks of LiF-B2O3 and LiBH, LiO2 nanofilm and LiH nanocones are detected on LiF surface. It explains impossibility of annealing LiF-detectors

Kinetics and phase transformations during decomposition of the supersaturated Mg solid solution in the Mg-Dy-Sm alloys at different Dy/Sm content ratios were investigated in this work. The solid solution decomposition occurs upon aging at a temperature of 200°C, at which strengthening of the alloys was expected to be highest. With increasing Dy/Sm ratio, the solid solution decomposition gradually decelerates. Addition of Dy to the Mg-Sm alloys intnsifies the age hardening, and the addition of Sm to the Mg-Dy alloys also promotes the hardening. The Mg solid solution decomposition in the ternary Mg-Dy-Sm alloys is accompanied by the formation of the GPzones, ordering, and the precipitation of plate-like particles in certain planes of the Mg crystal lattice. Such processes are typical of solid solution decomposition in the binary Mg-Re (Nd, Sm, Y, Gd, Tb, Dy) alloys.

The studies are represented of phase and structure transformations during the process of multi-stage heat treatment of large-scale rolls. Adapted analytical models are introduced and applied to the calculation of phase transformations together with the finiteelement models of rolls. The results show phase components distribution over the hardened layer of rolls of the special alloy steels 50CrMnMoV and 45Cr3MnNiMoV at different stages of the manufacturing process.