N.I. Sidnyaev, V.P. Savchenko

А.N. Tarasova - Assistant Professor, Department of Engineering Graphics, Moscow Aviation Institute (National Research University). E-mail: msannik@yandex.ru А.S. Kurbatov - Ph.D. (Eng.), Chief Researcher, State Scientific Center «M.V. Keldysh Research Cen-ter». E-mail: .defunt@inbox.ru А.N. Astapov - Ph.D. (Eng.), Associate Professor, Department of Material Sciences, Moscow Aviation Institute (National Research University). E-mail: Lexxa1985@inbox.ru