A5053339024- Material Properties and Applications
- Titanium Alloys Microstructure and Properties
- Metal and Thin Film Mechanics
- Nuclear Materials and Properties
- Surface Treatment and Coatings
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced materials and composites
- Intermetallics and Advanced Alloy Properties
- Material Properties and Failure Mechanisms
- Aluminum Alloy Microstructure Properties
- Additive Manufacturing Materials and Processes
- High-Temperature Coating Behaviors
- Engineering and Environmental Studies
- Surface Treatment and Residual Stress
- Aluminum Alloys Composites Properties
- Engineering Diagnostics and Reliability
- Microstructure and mechanical properties
- Historical Geopolitical and Social Dynamics
- Advanced Materials Characterization Techniques
- Metal Alloys Wear and Properties
- Engineering Technology and Methodologies
- High Entropy Alloys Studies
- Historical and Archaeological Studies
- Copper Interconnects and Reliability
- Additive Manufacturing and 3D Printing Technologies
Moscow Aviation Institute
2020-2023
Kinetics of the processes volumetric and surface unidirectional absorption hydrogen by two-phase (α+β) — titanium alloy VT23 (Ti—Al—Mo—V—Fe—Cr) at a temperature 800 °C in concentration range from 0.2 to 0.8% (wt.) has been studied. It is established that varying introduced during hydrogenation annealing, it possible form structures volume three-phase (α+α′′+β) single-phase β. shown changing conditions using barrier coatings, control depth penetration and, consequently, completeness α→β...
The possibility of transforming a large-plate structure and creating gradient in samples titanium alloy VT23 during thermal hydrogen treatment has been studied. It is shown that by varying the concentration-time parameters hydrogenation annealing, it possible to regulate depth penetration purposefully form near-surface layers. Subsequent low-temperature vacuum annealing makes transform coarse-plate into finely dispersed one with hardness up 40 HRC. was established thickness layer...
Abstract This article contains the comparison of physical and mechanical properties several titanium alloys. The chemical composition influence on is investigated. VT22I VT35 highly alloyed alloys are most prominent materials for armor elements production with ultimate tensile strength 1200-1400 MPa impact 0,25-0,3 MJ/m 2 .
Abstract The possibility of using a titanium nitride coating as «protective» layer against the penetration hydrogen into VT6 alloy semi-finished or finished products was shown in this article. It found that does not dissolve during high-temperature vacuum annealing and «isolates» sample sides from penetration, which allows to form linear gradient structure subsequent thermal treatment.
Abstract The ability of hydrogen to penetrate through the oxide film formed during air-atmosphere annealing at elevated temperatures on VT6 titanium alloy samples was studied in this paper. It investigated that prevents penetration up 0.4 wt.% hydrogen. shown it is possible change depth and surface layer structure by varying amount added determined formation a finely dispersed after thermal treatment allows increase hardness 8-10 HRC, compared center material.
The possibility of controlling the process structure formation in titanium transition grade alloy VT22 (Ti—5.5Al—4.3V—4.2Mo—0.8Cr—0.8Fe) by thermal hydrogen treatment (reversible alloying with hydrogen) has been investigated. It is shown that a large volume fraction β-phase, inherent (α+β) — alloys class (at least 40% studied alloy), provides suppression martensitic transformation already introduction 0.1% (wt.) hydrogen, and 0.3% only metastable β-phase fixed structure. During subsequent...
Abstract This paper shows the possibility of creating a “linear gradient” structure, which varies from finely dispersed globular grains to coarse lamellar ones over cross section 13-mm semi-finished product VT6 alloy, using thermohydrogen treatment method. The formation oxide layer and depth oxygen penetration were studied depending on heating temperature duration treatment. stability was assessed during subsequent annealing in vacuum. It established that only film provides protection...
For the VT35 alloy, range of alloying element content, which is most significant for providing increased dynamic strength, has been statistically determined. It was found out that in order to achieve balanced set properties guarantees strength must be carried at lower limit allowable range. The temperature-time regime hardening heat treatment established, a tensile about 1300 MPa with relative narrowing 16% and an impact 0.3 MJ / m2.