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Information × Registration Number 0225U003253, (0122U002555) , R & D reports Title The formation of gradient surface structures in metal-containing materials for operation in extreme conditions popup.stage_title Створення ґрадієнтних приповерхневих структур у металовмісних матеріалах для експлуатації в екстремальних умовах Head Lizunov Viacheslav V., Доктор фізико-математичних наукFirstov Heorhii S., Доктор фізико-математичних наук Registration Date 06-06-2025 Organization Institute of Metal Physics. G.V. Kurdyumov of the National Academy of Sciences of Ukraine popup.description1 The aim of the work is the developing of new methods of surface modification by combined thermopower techniques with high-frequency impact load and diagnostics of constructional materials based on friction/fatigue/wear data to increase the lifetime of industrial products. popup.description2  It is shown that under the conditions of combined processing of high-carbon low-alloy 9Г2Ф steel by laser hardening and subsequent intensive plastic deformation using high-frequency (ultrasonic) impact treatment (HFIT), a layered microstructure is formed in the surface layers (the layer closest to the surface with a thickness of 50 μm contains an equiaxed nanoscale (10–15 nm) grain structure and dispersed carbides VC and Fe3C, and in the lower layers with a thickness of 300–350 μm — a dispersed martensitic structure), surface roughness (Ra = 0.35 μm), surface microhardness (11.5 GPa), and residual compressive macrostresses (–580 MPa). Combined treatment by HFIT and electrospark doping (ESD) with chromium allows to increase the value of cyclic durability of welded joints from 15ХСНД steel in 3% NaCl solution due to the formation of a surface layer doped with an anti-corrosion element (chromium) and the formation of dispersed grain structures in it, such as the so-called ‘white layers’, which leads to the prevention of corrosion damage and reduces the likelihood of stress concentration and premature failure. Complex treatment, which includes gas-flame spraying of coatings of the Ni–Cr–Si–B–C system with their subsequent finishing modification by HFIT, leads to the formation of a compacted coating and a gradient structure of the metal substrate, which prevents the formation of surface damage caused by friction or a corrosive environment. Combined methods of laser-ultrasonic hardening, HFIT and ESD, high-frequency hardening, gas-flame spraying and HFIT of carbon steels with different carbon and alloying elements content lead to an increase in the service life of parts and products made from them. Product Description popup.authors IVANIChOK Nataliia Ya. IVANENKO Oksana L. Ariamov Anatolii M. BASKOVA Oleksandra I. BEVZ Vitalii P. BODENKO Viktor V. BONDARCHUK Vadym I. BURTsEV Viktor V. VASYLYK Yaroslav V. VASYL'YEV Mykhailo O. VOLOSEVYCH Pavlo Yu. Vradii Yevhenii I. HALKINA Anastasiia A. HATsENKO Oleksandr S. HRUBYAK Andrii B. DOVHOPOL Vasyl P. Dordiienko Mykola O. DROBOVYCh Valentyn P. Dubynskyi Ihor M. ZhURAVEL' Oleksii P. Zavdovieiev Anatolii V. ZAPOROZHETS Oleh I. ZATSARNA Oleksandra V. KAYKAN Larysa S. KOLESNYK Veniamin M. KORZACHENKO Liubov Ye. KOTRECHKO Serhii O. KRYVENKO Yevhen O. LESYK Dmytro A. MAKEYeVA Iryna M. MANHUShEVA Valentyna V. Melnychenko Tetiana V. MEL'NYChUK Vasyl O. Mykhailovskyi Vladyslav A. MOKLYAK Volodymyr V. MORDYUK Bohdan M. NALYVAYKO Nina V. NOVIK Tamara S. ONISHCHENKO Volodymyr M. OSTAFIYCHUK Bohdan K. PISKUN Nataliia O. PAKULA Dmytro L. PLAKHOTNIKOV Volodymyr V. POHREBNYaK Vitalii I. REShETNYK Oleh V. RUSAKOVA Yuliia V. SAVIN Mykola I. SKORYK Mykola A. SOROKA Kateryna F. STETsENKO Nataliia M. FILATOVA Vira S. FOKINA Olena Ye. Khorunzhyi Serhii V. KHRIPTA Nataliia I. KhRANOVSЬKA Kateryna M. ChELYaDIN Volodymyr L. ChENAKIN Serhii P. popup.nrat_date 2025-06-06 Close