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High-temperature compressive strength of niobium-titanium alloy in turbine blades

Currently, the application of niobium-titanium alloy (Nb-Ti) in turbine blades is not common or widely mentioned. However, the methods of ensuring high-temperature compressive strength of high-temperature alloys (such as nickel-based, cobalt-based and iron-based alloys) in turbine blades can provide us with some reference. The following are some key methods for high-temperature alloys to ensure high-temperature compressive strength in turbine blades:
1. Material selection and design:
• **Nickel-based high-temperature alloy** is one of the most commonly used materials in turbine blades at present, occupying more than 80% of the high-temperature alloy market. These alloys improve their high-temperature creep strength and oxidation resistance by adding elements such as rhenium and tungsten.

• Directional solidification and single crystal technology: Through directional solidification and single crystal technology, the transverse grain boundaries can be eliminated, and the high-temperature creep strength and organizational stability of the alloy can be significantly improved.

2. Cooling technology:
• Air film cooling and impingement cooling: By optimizing the cooling structure of the blade, the operating temperature of the blade can be effectively reduced, and its compressive strength and life can be improved.

3. Coating technology:
• Applying a protective coating on the blade surface can improve its resistance to high-temperature oxidation and corrosion and protect the base metal from high temperature damage. If niobium-titanium alloy is used for turbine blades, its high-temperature compressive strength may be ensured by similar methods, including optimized material design, advanced manufacturing processes (such as directional solidification or single crystal technology), cooling technology and coating technology.