Evolution of commercial titanium alloys microstructure under neutron and ion irradiation

Results of neutron and ion irradiation on microstructure of titanium alloys of V T-9, V T-12, O T4-1 trade-marks are considered. Samples with 8·4·2 mm3 sizes were irradiated by neutrons in wet channel of WWR-K reactor (E>0,1 MeV) under temperatures below than 80 deg C up different influences. Neutron energy is made up 2,35 MeV (flow 6,5·1016 m-2·c-1). Ion irradiation was carried out on impulse accelerator with energy of accelerated ions 60 keV (impulse duration 250 μs, frequency 3-25 Hz). It was defined that phase recrystallization is taking place in the result of neutron irradiation influence on structure of phases in dilute heterogeneous commercial α+β alloys of titanium-aluminium system. The recrystallization has both the quantitative ratio of phase partials and characteristics of fine structure each of it. It was shown that irradiation of V T-14 alloys by ions on the initial stages up to fluence 2·1017 ion/sm2 conduits to increasing of microhardness up to 60 %. 7 refs., 7 figs