Titanium aluminum alloy is a high-strength, high-temperature-resistant material. Titanium and aluminum are both lightweight and strong alloys. It has low density, light weight, high structural strength, and good high-temperature resistance. It plays an important role in the aerospace industry.

1.Titanium Aluminum Application differences

Aluminum alloy is a cost-effective material with high thermal conductivity, so it is often used as a radiator. However, titanium has low density. In addition to being light in weight, it also has excellent high-temperature resistance, so it is widely used in aerospace engine parts. Extensive use of titanium alloy parts. And titanium also has the characteristics of corrosion resistance. Titanium has a high affinity with oxygen and strong adhesion. An oxide film is formed on the surface of titanium to protect the base material from corrosion. Ti64 can also resist salty environments very well and is often used in in the marine environment.

2. Application of Ti3Al in aerospace engines In the aerospace industry

Ti3Al alloys have better properties than nickel-based alloys, and have been successfully made into high-pressure turbine stator support rings for aero engines, high-pressure compressor casings made of Al3Al, etc., using a combination of Ti2AlNb alloy and TiAL alloy blades. Into a bimetal centrifugal impeller. Ti3Al and Ti2AlNb alloys are mainly chemical elements of Ti-Al-Nb.

3.Types and characteristics of  Titanium Aluminum alloy

1. Types of titanium aluminum alloys Ti3Al alloy has many components, including Ti-24Al-11Nb, Ti-25Al-10Nb-3V-1Mo, Ti24.5Al-10Nb-3V-1Mo, Ti-24Al-14Nb-3V-0.5Mo and Ti-23Al-17Nb. Commonly used.
2. Flame retardant properties of titanium aluminum alloy The melting point of Ti3Al alloy is 1600c and the density is 4.2g/cm3, which is lower than ordinary titanium alloy. Moreover, TiAl and Ti3Al have strong flame retardant properties, which are obviously better than ordinary titanium alloy. And Ti-22Al-27Nb and Ti-22Al-20Nb-7Ta alloys also have good flame retardant properties.
3. Oxidation resistance of titanium aluminum alloy Research shows that Ti3Al alloy containing 17% Nb has excellent oxidation resistance, and adding an appropriate amount of Ta is beneficial to the oxidation resistance of Ti2AlNb alloy.

4.Mechanical properties of Ti3Al alloy

1. Specific strength: Ti-22Al-27Nb and Ti-24.5Al-23.4Nb, the specific strength from room temperature 750 degrees Celsius is significantly better than Inconel718 nickel-based superalloy.
2. Creep performance: The creep rate of Ti-22Al-27Nb and Ti-22Al-21Nb alloys is lower than that of high-temperature alloy Inconel718. And similar to titanium alloy.
3. Anti-fatigue performance: Ti3Al and Ti2AlNb alloys generally have excellent fatigue resistance at room temperature and high temperature.

5.Ti-22Al-25Nb alloy

Ti-22Al-25Al alloy has the advantages of low density, low cost, and good overall performance. The alloy also has good resistance to high temperature oxidation.

• Room temperature fracture toughness: KIC 29-31MPa*m1/2
• Temperature 650:360MPa
• Room temperature rotational bending fatigue strength limit: 549MPa