Application of nickel-based high-temperature alloys in aircraft engines

The turbine blades, combustion chambers and other parts of aircraft engines are exposed to extremely high temperature and high pressure working environments for a long time, so the performance requirements of materials are extremely stringent. Nickel-based high-temperature alloys have become key materials in aircraft engines due to their excellent high-temperature performance. This article will focus on the application of inconel 625 material in aircraft engines and the challenges they face.

1. Requirements for materials in aircraft engines

During the operation of aircraft engines, turbine blades need to withstand huge impacts from airflow while maintaining excellent mechanical properties in high-temperature environments. Specific material requirements include:

High-temperature strength: The material must have sufficient strength in a high-temperature environment to withstand the impact of high-speed airflow on the blades and the mechanical stress caused.

Oxidation resistance: The parts in aircraft engines are exposed to high temperature and high-oxygen environments for a long time, requiring the material to have strong oxidation resistance to prevent oxidation of the material surface.

Corrosion resistance: Due to the complex gas composition in the engine working environment, the material is required to exhibit excellent corrosion resistance in a corrosive gas environment.

2. Application of nickel-based high-temperature alloys in turbine blades

Turbine blades are key components in aircraft engines and are required to have extremely strong high-temperature resistance. material hastelloy c276 are ideal materials for turbine blades due to their excellent high-temperature strength and oxidation resistance.

Material selection: Nickel-based alloys commonly used in turbine blades, such as Inconel 718 and Rene 41, have high melting points and oxidation resistance.

Cooling technology: Since the surface temperature of turbine blades can reach above 1200°C, nickel-based alloy turbine blades usually use internal cooling channel technology to reduce the surface temperature of the blades through the flow of coolant.

3. Challenges and future development

Although nickel-based superalloys are widely used in aero engines, they still face some challenges:

High-temperature fatigue and creep: At high temperatures, the fatigue and creep problems of alloys are still a challenge, and their high-temperature performance needs to be improved by improving the alloy composition and structure.

Material economy: The cost of nickel-based superalloys is high, so it is necessary to reduce the production cost of materials while improving performance.

Manufacturing technology: The complex structure of turbine blades requires high-precision manufacturing processes. For example, the development of 3D printing technology provides new possibilities for manufacturing blades with complex shapes.

Conclusion

Nickel-based superalloys have become ideal materials for key components such as aircraft engine turbine blades due to their excellent high-temperature performance. With the development of material research and manufacturing technology, nickel-based superalloys will play a more important role in aircraft engines.