ВИЗНАЧЕННЯ ТЕМПЕРАТУРНИХ УМОВ ОТРИМАННЯ СУБМІКРО- ТА НАНОСТРУКТУР ПРИ ДІЇ ІОНІВ НА МАГНІЄВІ СПЛАВИ У ПЛАЗМОВОМУ СЕРЕДОВИЩІ

Magnesium alloys exhibit high physico-mechanical properties, making them widely used in aerospace engineering. However, considering the high speeds and extreme temperatures at which modern aerospace structures, particularly engine components, operate, there is a need to enhance their performance characteristics. The use of ionizing radiation for forming nanostructured and submicrostructures layers on magnesium alloys requires the determination of optimal technological parameters. To address this, a theoretical study was conducted on the effect of ionizing radiation on the ML9 magnesium alloy using a previously proposed model. This model enables the resolution of not only heat conduction problems but also the analysis of the thermomechanical state in the zone of ionizing radiation exposure. As a result of the theoretical studies, dependencies of maximum temperatures, as well as maximum and minimum thermal stresses, on ion energy and charge were determined for a wide range of ions affecting magnesium alloys. These data can be used to assess the feasibility of nanostructure formation under specific processing conditions. Additionally, for certain metal ions in paired comparisons, conditions were established under which they generate similar temperature fields and thermal stresses. For example, the nickel-cobalt and molybdenum-hafnium pairs exhibit comparable effects on the material, allowing for the selection of the most cost-effective ion treatment option to obtain protective and strengthening coatings with submicro- or nanostructures. The obtained research results can be used to evaluate the potential for nanostructure formation under various technological regimes. The key factors for this assessment include temperature values, their rate of increase, as well as the maximum and minimum thermal stress values. A criterion for nanostructure formation can be considered as achieving the required temperature range (500–1500 K), temperature increase rates exceeding 10⁷ K/s, and the presence of thermal stresses in the range of 10⁷–10⁹ Pa, which significantly accelerate the nano structuring process. The conducted research will be valuable in developing technologies for producing protective and strengthening coatings on magnesium alloys.