Why Do Aerospace Materials Have To Use Titanium Alloys Bar and Ring ?

Characteristics of titanium

High strength: 1.3 times that of aluminum alloy, 1.6 times that of magnesium alloy, 3.5 times that of stainless steel, the champion among metal materials.

High thermal strength: the operating temperature is several hundred degrees higher than that of aluminum alloy, and it can work for a long time at a temperature of 450-500 °C.

Good corrosion resistance: acid resistance, alkali resistance, atmospheric corrosion resistance, especially strong resistance to pitting corrosion and stress corrosion.

Good low-temperature performance: Titanium alloy TA7 with extremely low interstitial elements can maintain a certain degree of plasticity at -253°C.

High chemical activity: The chemical activity is very high at high temperatures, and it is easy to chemically react with gas impurities such as hydrogen and oxygen in the air to form a hardened layer.

Small thermal conductivity and small elastic modulus: thermal conductivity is about 1/4 of nickel, 1/5 of iron, and 1/14 of aluminum, and the thermal conductivity of various titanium alloys is about 50% lower than that of titanium. The elastic modulus of titanium alloy is about 1/2 of that of steel.

Aviation application of titanium alloy

Titanium alloys are mainly used for aircraft and engine manufacturing materials, such as forged titanium fans, compressor discs and blades, engine covers, exhaust devices, and other parts, as well as structural frame parts such as aircraft beams and frames. The spacecraft mainly uses the high specific strength, corrosion resistance, and low-temperature resistance of titanium alloys to manufacture various pressure vessels, fuel storage tanks, fasteners, instrument straps, frames, and rocket shells. Artificial earth satellites, lunar modules, manned spacecraft, and space shuttles also use titanium alloy plate weldments.