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Information × Registration Number 0225U004229, (0123U102650) , R & D reports Title New materials with a gradient nanostructure for load-bearing structures of the increased reliability and human security under special conditions popup.stage_title Розробка нової сталі і її обробки для отримання градієнтної нанострукрури з підвищеними властивостями.Узагальнення результатів роботи за проєктом . Head Brykov Mykhailo M., Доктор технічних наук Registration Date 26-11-2025 Organization Zaporizhzhya Polytechnic National University popup.description1 The aim of the project is to achieve the highest possible set of strength properties for non-alloy or low-alloy (up to 5 wt.% Alloying elements in total) steels applicable in mass production, including the creation of gradient nanostructures popup.description2 The object of research is processes of thermal treatment and structure formation of unalloyed and low-alloy steels. The purpose of the work is to develop new steel and its processing to obtain a gradient nanostructure with enhanced properties. Research methods are as follows: heat treatment of low-alloy steels, determination of mechanical properties of heat-treated samples, study of microstructure and fracture surfaces of samples using optical and scanning electron microscopy, X-ray diffractometry, measurement of hardness and microhardness, computer analysis of microstructure images, modeling of properties of high-strength steels. The composition and properties of high-strength steels in a wide range of carbon content were modeled. For every steel with a fixed carbon content, the content of alloying elements was determined, which is necessary to maintain the martensite start temperature at a given level. The composition of a new steel of the silicon-manganese alloying system was developed. The steel is suitable for heat treatment in any of the main modes: quenching with tempering, isothermal treatment to bainite, quenching & tempering. The optimal mode of isothermal treatment of the new steel was determined, tests were conducted and information on mechanical properties was obtained. The structure of heat-treated samples was studied. The weldability of heat-treated samples was studied. Mechanical tests of welded samples were carried out and the possibility of obtaining high-quality welded joints was proven. Product Description popup.authors Vasyl V. Girzhon Oleksii V. Yefremenko Oleksandr V. Klymov Mykhailo M. Brykov Oleksii Y. Kapustian popup.nrat_date 2025-11-26 Close