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Е. Н. Степанова, Г. П. Грабовецкая*, И. П. Чернов
«Особенности наноструктурирования титанового сплава Ti–6Al–4V с использованием обратимого легирования водородом »
PACS numbers: 61.72.Ff, 61.72.Mm, 61.80.Fe, 61.82.Rx, 81.07.Wx, 81.20.Ev, 81.40.Vw
The evolution of the structural and phase states of Ti–6Al–4V alloy in nanostructuring process with the use of the method combining reversible hydrogen alloying and hot plastic defor-mation are studied by the electron microscopy and x-ray dif-fraction analysis. Plastic deformation in the ????? two-phase region at 1023 K is found to initiate a complete ????? trans-formation of Ti–6Al–4V alloy (hydrogen concentration is 0.2–0.33 wt.%) and to form a nanostructured state with the grain–subgrain elements size of less than 0.1 ?m. Electron-beam ex-posure as well as vacuum annealing are found to lead to ? ? ? phase transformation and grain growth up to submicron sizes (grain size is less than 1 ?m). Possible reasons underlying differences in the rate of grain–subgrain structure elements growth in case of vacuum annealing and electron-beam exposure are discussed.