VT18u (ВТ18У)
VT18U Titanium Alloy for Aerospace Applications
VT18U Titanium is a high-performance titanium alloy, specifically designed for aerospace applications. With excellent strength-to-weight ratios, corrosion resistance, and high-temperature stability, VT18U is widely used in manufacturing critical components such as gas turbine engine blades, aircraft structures, and rocket parts. Its exceptional mechanical properties make it ideal for aerospace and high-performance industries.
What is VT18U Titanium Alloy?
VT18U titanium alloy (also known as VT18u or VT18U) is a complex-alloyed titanium alloy that features superior creep resistance, excellent high-temperature strength, and outstanding corrosion resistance. The alloy contains key elements like aluminum, zirconium, niobium, and molybdenum, making it suitable for demanding environments. Its unique blend of elements gives it remarkable mechanical properties, particularly in high-stress, high-temperature applications like aerospace and energy sectors.
With excellent machinability and strong resistance to thermal stress, 2618 aluminium remains highly suitable for complex machining operationswhile maintaining exceptional mechanical properties even under high-temperature conditions.
High Strength-to-Weight Ratio: Offers exceptional mechanical performance with minimal weight, crucial for aerospace components.
Corrosion Resistance: Resists corrosion even in harsh environments, extending the life of critical components.
Characteristics of the material VT18u
| Grade : | VT18u |
| Classification : | Titanium wrought alloy |
| Application: | for the production of rods, forgings, stampings; heat-resistant alloy, recommended for parts operating for a long time (up to 500 hours) at 550 - 600 °C and for a short time (single-use parts) - up to 800 °C. |
| Foreign analogues: | No data |
Chemical composition in % of the material VT18u
GOST 1-90013 - 81
| Fe | C | Si | Mo | N | Nb | You | Al | Zr | O | Sn | H | Impurities |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| up to 0.2 | up to 0.1 | 0.1 - 0.25 | 0.4 - 1 | up to 0.04 | 0.5 - 1.5 | 82.11 - 87.3 | 6.2 - 7.3 | 3.5 - 4.5 | up to 0.14 | 2 - 3 | up to 0.015 | other 0.3 |
Key Mechanical Properties of VT18U Titanium Alloy
| Property | Value |
|---|---|
| Tensile Strength (σT) | 880 – 1080 MPa |
| Yield Strength (σY) | 880 – 980 MPa |
| Elongation (δ5) | 10% |
| Reduction of Area (ψ) | 25% |
| Impact Strength (KCU) | 230 kJ/m² |
| Brinell Hardness (HB) | 250 |
These properties make VT18U Titanium Alloy ideal for aerospace applications, where components must endure extreme stress and temperature conditions while maintaining excellent strength and toughness.
Mechanical properties :
σin - Tensile strength [MPa]
σT - Yield stress [MPa]
δ5 - Specific elongation at fracture [%]
ψ - Reduction of area [%]
KCU - Impact strength [kJ/m²]
HB - Brinell hardness [MPa]
Physical properties :
T - Test temperature [Grade]
E - Young modulus [MPa]
α - Coefficient of linear expansion (20° - T) [1/Grade]
λ - Thermal (heat) condition coefficient [Watt/(m·Grade)]
ρ - Density [kg/m³]
C - Specific heat (range 20° - T) [J/(kg·Grade)]
R - Electrical resistance [Ohm·m]
VT18U Titanium Applications in Aerospace
Due to its excellent combination of strength and heat resistance, VT18U is primarily used in:
- Gas turbine engine blades
- Aircraft structural components
- Rocket components
- High-temperature fasteners
Its ability to maintain strength at elevated temperatures (up to 873 K) allows it to perform reliably in demanding aerospace environments.
VT18u - Titanium deformable alloy
VT18u - chemical composition, mechanical, physical and technological properties, density, hardness, application