Application of titanium alloy in the military industry

Titanium alloy has high tensile strength (441~1470MPa), low density (4.5g / cm³), excellent corrosion resistance and certain high temperature lasting strength at low temperature of 300~550℃, which is an ideal lightweight structural material. Titanium alloy has the functional characteristics of superplastic, using superplastic forming-diffusion connection technology, which can be made into complex shapes and precise size products with little energy consumption and material consumption.
The application of titanium alloy in the aviation industry is mainly to make aircraft fuselage structure, landing gear, support beam, engine compressor plate, blade and joint, etc. In the aerospace industry, titanium alloy is mainly used to make bearing components, frames, gas cylinders, pressure vessel, turbine pump shell, solid rocket engine shell, nozzle and other parts. In the early '50's, In some military aircraft began to use industrial pure titanium to manufacture the rear fuselage of the heat insulation plate, tail cover, deceleration plate and other structural parts; In the '60's, The application of titanium alloy in aircraft structure has been expanded to the main force structure such as flap sliding, bearing frame and landing gear beam; Since the 70s, Rapid increasing use of titanium alloy in military aircraft and engines, Expanding from fighter aircraft to large military bombers and transport aircraft, Its use in the F14 and F15 aircraft represents 25% of the structural weight, In the F100 and TF 39 engines, 25% and 33%, respectively; After the 80s, Titanium alloy materials and process technology have achieved further development, A B1B aircraft needs 90,402 kg of titanium material. Among the existing titanium alloys for aerospace, the most widely used is the versatile A + b type Ti-6Al-4V alloy. In recent years, the West and Russia have developed two new titanium alloys, which are titanium alloy with high strength and high toughness weldable and good formability and high temperature and high strength flame retardant titanium alloy. These two advanced titanium alloys have good application prospects in the future aerospace industry.
With the development of modern warfare, the army force needs a multi-functional advanced howitzer system with high power, long range, high precision and rapid response capability. One of the key technologies of the advanced howitzer system is the new material technology. Under the premise of ensuring dynamics and protection, titanium alloy has been widely used in army weapons.155 The gun can not only reduce the weight but the deformation of the gun barrel and effectively improve the shooting accuracy. Some complex components on the main battle tank and helicopter-tank multi-purpose missiles can be made with titanium alloy, which can meet the performance requirements of the products and reduce the processing cost of components.
For quite a long time in the past, the application of titanium alloy has been greatly limited due to the expensive manufacturing cost. In recent years, countries around the world are actively developing low-cost titanium alloys, which can reduce the cost, but also improve the performance of titanium alloys.With the gradual increase of the amount of titanium alloy, it is an inevitable trend to develop titanium alloy to seek a lower manufacturing cost.