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Electron Energy Spectra of Elastically and Discretely Scattered Electrons of the Ti–6Al–4V Alloy Fracture Surface after Radial Shear Rolling at a Temperature of 1000°С
Physical Mesomechanics  (IF1.85),  Pub Date : 2021-06-01, DOI: 10.1134/s1029959921020028
V. E. Panin, I. A. Shulepov, L. B. Botaeva, N. A. Narkevich

Abstract

The change in the spectra of elastically and discretely scattered electrons in Ti–6Al–4V alloy subjected to radial shear rolling at T = 1000°C was studied in comparison with the initial state. Interatomic bonds in the equilibrium α phase of the alloy are formed by Al sp electrons, and their contribution is small. Quenching after radial shear rolling at T = 1000°C causes the formation of a nonequilibrium αʹ phase in the α phase. The resulting αʹ phase contains vanadium atoms whose d electrons are part of the interatomic bond. As a result, the α phase is strengthened and the low-temperature toughness of the alloy is enhanced. At the same time, sp electrons are strongly scattered by vanadium ions and therefore their contribution to the interatomic bond is weakened. This generates localized plastic flows in the lattice curvature zones, which develop in the field of Coulomb repulsion of electrons and govern a high relaxation ability of the alloy at low temperatures. Very high strengthening is found to be fundamentally related to a very high relaxation factor. The results are explained by the effect of structural transformation.