Effect of radiation by low-energy alpha-particles on the surface structure and physical-mechanical properties of high-purity tungsten was studied. Samples of tungsten were irradiated by 4He+2 ions with the energy of 45 keV at low-energy channel of accelerator DC-60 in Astana branch of Institute Nuclear Physics. Irradiation fluence was 1.5 × 1018 cm−2, irradiation temperature was 150°C. Experimentally found that irradiation with low-energy alpha particles results in formation of helium filled bubbles in the straggling region.

The paper reports results of comparative studies of the structure and physical-mechanical properties of stainless Cr18Ni10Ti steel and (TiMo)N coatings irradiated by He, Kr, and Xe ions with an energy of 20 keV/charge. Samples of steel and specimens with TiMoN coating on steel substrates synthesized by vacuum condensation with ion bombardment were irradiated with He, Ks and Xe ions on the low-energy channel of a DC-60 heavy-ion accelerator. It was found that the TiMoN coating significantly exceeds Cr18Ni10Ti stainless steel in the entire range of studied properties, such as strength, corrosion resistance and tendency to blistering.