Nosov Magnitogorsk State Technical University, Magnitogorsk, Russia:

D. V. Konstantinov, Cand. Eng., Specialist of the 1st Category of Management for International Activities, e-mail: const_dimon@mail.ru
A. G. Korchunov, Dr. Eng., Prof., Head of the Dept. of Design and Operation of Metallurgical Machines and Equipment
E. M. Ogneva, Cand. Eng., Specialist of the 1st Category of Management for International Activities
M. A. Polyakova, Dr. Eng., Prof., Dept. of Materials Processing Technology

TRIP steels have a proven track record in passive automotive safety due to their microstructure. Retained austenite transforms into hard martensite in conditions of high strain or strain rates, positively affecting the ability of the structural element to absorb external energy. The article presents the intermediate results of the Russian-Italian project to develop the theoretical foundations for the use of such steels for machine building parts obtained by 3D printing. On the basis of finite element modeling by the SIMULIA Abaqus software package, the potential of using such steels in the field of mechanical engineering for parts operating in extreme and difficult to predict conditions has been scientifically substantiated. By computer multiscale modeling it is demonstrated how mechanical engineering parts are able to flexibly adapt to non-stationary loads and extreme operating conditions. The effect of adaptation consisted in local hardening, which delayed the initialization and propagation of cracks. Preliminary studies of TRIP steel powder have been carried out and the first results of SLM printing of prototype samples from TRIP steel powder with traditional and modified chemical composition have been presented. Research shows a solid potential for the application of TRIP steel powder 3D printing technology for the mechanical engineering industry, not only in terms of manufacturing new parts, but also the restoration of already damaged elements.
The authors express their gratitude to M. Dabalá, Doctor of Engineering Sciences, University of Padua, Italy.
The research was carried out within the framework of contract No. 13.2251.21.0107 (No. GIIS “Electronic Budget” 075-15-2021-1031) on the topic “Research on 3D printing with progressive high-strength steels with TRIP effect for the manufacture of self-adapting structural elements of the aerospace industry”, funded by the Ministry science and higher education of the Russian Federation.

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