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  1. No Access

    Article

    Physicomechanical Properties of Coatings Based on Max Ti2AlC and (Ti, Nb)2AlC Phases at 20°C and 500°C

    Physicomechanical characteristics of 15Kh16k5N2MVFAB-Sh steel (0.15C–16Cr–5Co–2Ni–0.7V–0.6Mo–0.3Nb–0.4N): wear resistance at 20°C and 500°C and resistance to fretting fatigue at 20°C without and with coatings ...

    V. Ya. Podhurska, O. S. Kuprin, R. V. Chepil, O. P. Ostash… in Materials Science (2023)

  2. No Access

    Article

    Pressing of Semi-Finished Al–Mg–Sc Alloy Products in Isothermal Conditions

    The results of modeling and experimental study of the hot isothermal pressing process of various thicknesses strips from cast cylindrical workpieces of 1570 and 1545 alloys of Al-Mg-Sc system are presented. Th...

    A. V. Titov, K. B. Balushok, O. P. Ostash, V. A. Titov, V. O. Koreva… in Materials Science (2023)

  3. No Access

    Article

    Elevation of Strength of the Anode-Substrate Material of Hydrogen and Hydrocarbon Solid-Oxide Fuel Cells

    We study the microstructure, strength, and micromechanisms of fracture of 50%(ZrO2–4 mole% Y2O3–2 mole% CeO2–2 wt.% Al2O3)–50% (NiO–5 wt.% CuO) ceramics in the as-sintered state after one-time reduction and after...

    B. D. Vasyliv, V. Ya. Podhurska, O. P. Ostash, I. А. Danilenko… in Materials Science (2022)

  4. No Access

    Article

    Influence of Rare-Earth Metals on the Structure and Properties of Cast and Deformed Alloys of the Al-Mg-Cr-Sc-Zr System

    We study the structure and properties of an alloy of the Al–Mg–Sc system, which has a lowered magnesium content (4.55–4.65 wt.%), and manganese is replaced with 0.4–0.5 wt.% of chromium; moreover, it is microa...

    O. P. Ostash, S. L. Polyvoda, R. V. Chepil, V. A. Titov, K. O. Gogaiev… in Materials Science (2022)

  5. No Access

    Article

    Strength and Cyclic Crack-Growth Resistance of Thermally Deformed Alloys of the Al-Mg-Sc System

    We study the microstructure, phase composition, strength and plasticity characteristics, and crack-growth resistance under cyclic loading of thermally deformed (by extrusion, pressing, and rolling) castings of...

    O. P. Ostash, R. V. Chepil, V. A. Titov, S. L. Polyvoda, M. M. Voron… in Materials Science (2021)

  6. No Access

    Article

    Light Interconnects for Medium-Temperature (550–650°С) Solid-Oxide Fuel Cells

    We study the heat resistance and electric conductivity of the specimens of Crofer 22 APU steel, which is traditionally used for the production of interconnects of solid-oxide fuel cells, a bulk composite based...

    O. P. Ostash, T. O. Prikhna, V. Ya. Podhurska, O. S. Kuprin… in Materials Science (2021)

  7. No Access

    Chapter and Conference Paper

    Wear Resistance of Ti–Al–C MAX Phases-Based Materials for Pantographs Inserts of Electric Vehicles

    The mechanical and physical properties, such as microhardness, strength, wear resistance, and electrical conductivity, of the materials for the tram pantograph contact insert, which is worked with the contact ...

    V. Ya. Podhurska, O. P. Ostash… in Nanomaterials and Nanocomposites, Nanostru… (2021)

  8. No Access

    Article

    Influence of the Working Media of Fuel Cells on the Structure and Physicomechanical Characteristics of Ceramics of the ZrO2–Y2O3–NiO System

    We study the properties of ZrO2 –Y2O3 –NiO ceramics obtained by using the technologies of sintering of powders and tape casting in the intact state and after one-time reduction both in pure hydrogen and in Ar–5% ...

    B. D. Vasyliv, V. Ya. Podhurska, O. P. Ostash, I. O. Polishko… in Materials Science (2020)

  9. No Access

    Article

    Strength and Corrosion-Fatigue Crack-Growth Resistance of Alloys of the Ti–Nb–Zr–Si System Intended for Biomedical Purposes

    We study the influence of the chemical composition and the conditions of thermomechanical and thermal treatments on the structural strength determined by the characteristics of strength and cyclic crack-growth...

    O. P. Ostash, V. Ya. Podhurska, B. D. Vasyliv, L. D. Kulak… in Materials Science (2020)

  10. No Access

    Article

    Elevation of the Structural Strength of Welded Joints of Sheets Made of Alloys of the Al–Cu–Mg System

    We study welded joints of 2 mm-thick sheets of D16T aluminum alloy (an analog of the 2024-T3 alloy used abroad), which is now not recommended for welding. The joints are obtained by the friction stir welding. ...

    Yu. V. Holovatyuk, A. H. Poklyats’kyi, O. P. Ostash, T. M. Labur in Materials Science (2018)

  11. No Access

    Chapter and Conference Paper

    Effect of a Hydrogen Sulfide-Containing Atmosphere on the Physical and Mechanical Properties of Solid Oxide Fuel Cell Materials

    The effect of hydrogen sulfide content in a hydrogenous atmosphere on the structure, physical, and mechanical properties of solid oxide fuel cell (SOFC) anode materials has been studied. A series of specimens ...

    B. D. Vasyliv, V. Ya. Podhurska… in Nanochemistry, Biotechnology, Nanomaterial… (2018)

  12. No Access

    Article

    Influence of Alloying and Thermal Treatment on the Strength and Cyclic Crack Resistance of Welded Joints of Alloys of the Al–Cu–Mg System. Part 2

    We study welded joints of annealed sheets 6 mm in thickness made of D16M (Al–Cu–Mg) aluminum alloy, which is an analog of the foreign 2024 alloy currently attributed to difficultly welded alloys. The joints ar...

    Т. М. Labur, O. P. Ostash, Yu. V. Holovatyuk, V. А. Koval’… in Materials Science (2018)

  13. No Access

    Article

    Effect of the Additive of Y2O3 on the Structure Formation and Properties of Composite Materials Based on AlN–SiC

    The results of studies on the strength at bending and volumetric electrical resistance of composite materials based on AlN–SiC with additions from 2 to 6 wt % Y2O3. It is shown that at increasing the content of Y...

    T. B. Serbenyuk, T. O. Prikhna, V. B. Sverdun… in Journal of Superhard Materials (2018)

  14. No Access

    Article

    Influence of Alloying and Thermal Treatment on the Strength and Cyclic Crack Resistance of Welded Joints of Alloys of the Al–Cu–Mg System. Part 1

    We study welded joints of 6-mm-thick annealed sheets of D16M aluminum alloy (Al–Cu–Mg), an analog of the foreign 2024 alloy, currently regarded as difficultly welded. The joints are obtained by the method of p...

    Т. М. Labur, O. P. Ostash, Yu. V. Holovatyuk, V. А. Koval’… in Materials Science (2017)

  15. No Access

    Article

    On the Determining Parameters of Serviceability of the Elastic Clamps of Rail Fasteners

    It is established that the KP-5-type elastic clamps of the of the KPP-5-type rail fasteners made of 65G steel have lower durability as compared with the clamps of 60C2 steel despite the high strength and durab...

    O. P. Ostash, R. V. Chepil’, V. I. Hrybovs’ka in Materials Science (2017)

  16. No Access

    Article

    Mode I and Mode II Cyclic Crack Resistance of Wheel Steel

    The characteristics of the mode I and mode II cyclic crack resistance of model wheel steel are compared. The effect of heat treatment of test steel on its microstructure parameters, as well as strength and cyc...

    V. V. Kulyk, T. M. Lenkovs’kyi, O. P. Ostash in Strength of Materials (2017)

  17. No Access

    Chapter and Conference Paper

    Effect of Water Vapor Amount in Hydrogenous Atmospheres on Reducing Ability of the YSZ–NiO Fuel Cell Anode Material

    Anode ceramics of YSZ–NiO system for solid oxide fuel cells (SOFCs) has been investigated. A series of specimens were singly reduced in a hydrogenous atmosphere (the Ar–5 vol%Н2 mixture) at 600°С under the pressu...

    B. D. Vasyliv, V. Ya. Podhurska… in Nanophysics, Nanomaterials, Interface Stud… (2017)

  18. No Access

    Article

    Influence of Decarburization on the Durability of Steels for Rail Accessories

    We study the influence of the furnace and electric-contact heating, the temperature of austenitization, and the sand-blasting treatment on the structure, decarburization, strength, and durability of 60S2 and 6...

    V. I. Hrybovs’ka, R. V. Chepil’, O. P. Ostash in Materials Science (2016)

  19. No Access

    Article

    Influence of the Space Orientation of Joints in the Process of Welding on the Strength and Cyclic Crack Resistance of Welded Joints

    We study the regularities of influence of the space orientation of a joint (at angles of 0, 30°, 45°, and 90° to the horizontal plane) for different rates of consumable-electrode pulse-arc welding (23, 40, and...

    T. M. Labur, O. P. Ostash, Yu. V. Holovatyuk, V. M. Uchanin… in Materials Science (2016)

  20. No Access

    Article

    Anisotropy of the Cyclic Crack Resistance of Aluminum Alloys After Long-Term Operation

    We study the characteristics of cyclic crack resistance of specimens of D16ATNV (2024-T3-type) and V95T1 (7075-T6-type) aluminum alloys cut out from different zones of the wing of an AN-12 aircraft after 40 yr...

    I. M. Andreiko, Yu. V. Holovatyuk, O. P. Ostash, O. I. Semenets’… in Materials Science (2016)

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