Effect of plastic deformation, heat treatment, and electron irradiation on the structural-phase state of Cu – 40 at. % Pd is studied. X-ray phase analysis of initial samples, samples obtained by rolling up to 0.2 mm, samples annealed after rolling in an argon atmosphere at 950 °C for 1 h, and samples irradiated by high-energy electron in air at temperature of 300 °C was carried out. A change in the phase composition of the samples after rolling was found: ~ 6 % of the ordered β-phase with bcc structure was formed, which disappears after annealing. As a result of irradiation, a layer of copper oxide CuO formed on the surface of the alloy, which under normal thermal conditions is formed at a temperatures of 400 – 500 °C, and the reflections of the ordered β-phase also disappeared in the near-surface layer. The elemental composition of the alloy changed in depth from the irradiated metal surface. Phases with a low degree of long-range order and an increased content of palladium were formed. The presence of these phases is due mainly to the selective oxidation of copper.
The effect of laser action on the structure of a model material — pure aluminum — is studied. Laser treatment of aluminum samples was carried out on a 15 J Nd:YAG laser, 10 pulses with a duration of 5·10–8 s. In the experiment, a transparent medium was used to exclude the influence of the thermal mechanism and create conditions for the shock-wave mechanism of action on the material. The structure was studied by transmission electron microscopy. After laser irradiation in pure aluminum, the formation of crystallographically oriented voids with transverse dimensions of 50 – 100 nm and a length of up to 500 – 800 nm was found. The mechanism of formation of such formations is discussed.
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