K. S. Senkevich, O. Z. Pozhoga, A. A. Chernyshova, M. M. Serov
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Microstructure and Properties of Porous Titanium Materials Fabricated by Cold Pressing and Low-Temperature Vacuum and Hydrogen Sintering
The effect of temperature and time parameters and sintering conditions on the structure and properties of porous VT1-0 titanium samples fabricated by cold pressing of rapidly quenched fibers is studied. The samples are sintered at 750–850°C for 1.5–2 h in a vacuum and upon hydrogenation to a hydrogen concentration of 2.5 wt % and subsequent dehydrogenation. The hydrogenation allows us to fulfill the sintering of fibers in a temperature range corresponding to the β-Ti + TiH2 phase region, and the nonhydrogenated fiber is sintered at the same temperatures corresponding to the α-Ti region. The hydrogenation–dehydrogenation in the course of sintering is found to exclude the imperfection of joint zones and to increase the mechanical properties of the porous sintered material. The maximum reached proportionality limit of the material subjected to hydrogen and vacuum sintering is 108 and 71 MPa, respectively.
期刊介绍：
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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