Titanium alloy is known as "space metal", and plays an irreplaceable role in aircraft bodies, engines, and rocket components.
Aircraft structural parts: Titanium alloys are widely used in aircraft fuselage structural components because of their low density, high specific strength, corrosion resistance and high temperature resistance. The use of titanium alloys in modern aircraft has reached 30% to 35% of the total structural weight, now it is an indispensable structural material. Specific applications include landing gear components, frames, beams, fuselage skins, heat shields and so on. For example, the titanium content of the US F-22 fighter jet is as high as 41%, and its main fuselage load-bearing beams and frames are integrally forged with titanium alloys.
Aero-engine: High-temperature titanium alloy is one of the key materials for aero-engine, which is mainly used for engine components such as compressor discs, blades, casings and other parts. These parts require high strength and good thermal stability under high temperature conditions. For example, IMI834 alloy has been used in the large engine Trent700 of Boeing 777 aircraft. In addition, Ti-60 alloy is a 600°C high-temperature titanium alloy developed independently by China, which has excellent thermal stability and high-temperature creep performance.
Flame-retardant titanium alloys: In order to solve the problem of “titanium fire”that may be generated by titanium alloys in aviation engines, various countries have developed flame-retardant titanium alloys. For example, Alloy C (Ti-35V-15Cr) alloy from the United States and BTT-1 alloy from Russia both have good flame-retardant properties and have been applied to engine's high-pressure compressor casings and blades of engines.
Aviation fasteners: Titanium alloy fasteners are widely used in the aviation field due to their excellent weight reduction effect, superb corrosion resistance, and non-magnetic properties. For example, the Russian Il-96 aircraft uses a large number of titanium alloy fasteners, which significantly reduces the weight of the aircraft.
Spacecraft structural materials: Titanium alloys are ideal for spacecraft structural materials due to their high strength and low-density properties. Capable of withstanding extreme temperature conditions and mechanical stress, these materials are commonly used in the manufacture of solid fuel containers, rocket engine components, lunar modules, docking adapter and fasteners, can effectively reducing structural weight and fatigue damage.
Space Shuttle: On the space shuttle, titanium alloy is used in the front of the wings and other parts due to its high temperature resistance, which can withstand temperatures up to 500 ℃ during flight. In addition, titanium alloys are also used in the thrust structure frame of the Space Shuttle to support the engine.
Missiles and Launch Vehicles: In the manufacturing of missiles and launch vehicles, titanium alloys are used to manufacture bulkheads, skins, fuel tanks and other parts, which need to withstand the high temperature effects caused by high-speed flight. In addition, in the turbojet engine power system, the compressor casing, compressor disc, compressor blades and other parts also use a lot of titanium alloy materials.
Spacecraft low-temperature environment materials: Due to the titanium alloy TA7ELI has special characteristics: at low temperatures, it has higher strength, better plasticity and toughness, China has developed a low-temperature-use 20L TA7ELI titanium alloy gas cylinder for used in liquid hydrogen environment. It is used in the CZ-XX series of launch vehicles.
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