O. N. Gvozdeva, A. S. Stepushin, A. V. Shalin, G. V. Gurtovaya, N. V. Ruchina
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引用次数: 0
Abstract—The possibility to control the structure formation in a VT22 titanium alloy of the transition class (Ti–5.5Al–4.3V–4.2Mo–0.8Cr–0.8Fe) using thermohydrogen treatment (reversible hydrogen alloying) is studied. A high volume fraction of the β phase, which is characteristic of α + β titanium alloys of the transition class (at least 40% in the alloy under study), is shown to suppress martensitic transformation even at 0.1 wt % hydrogen; at 0.3 wt % hydrogen, only the metastable β phase is retained in the structure of the alloy. Different types of structure, from a bimodal to a fine equilibrium structure, can be formed in the alloy during subsequent vacuum annealing by controlling the development of the β → α transformation. A fine α + β structure with an α-phase particle size of at most 0.5 μm forms only upon low-temperature (625–700°C) vacuum annealing.
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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