Titanium-aluminum-based alloys have the advantages of higher high-temperature compressive strength, fracture toughness, creep resistance, lower thermal expansion coefficient, lack of magnetism, and good flame retardancy, with a relatively low density (about 4.0 g/cm³) and the ability to operate at temperatures ranging from 600 to 750°C. These alloys exhibit high-temperature durability and high creep strength, making them suitable for use in combustion chamber and engine casing components. Compared to high-temperature alloy structures, the use of these alloys can result in a weight reduction of approximately 40%. As a result, they have become one of the most promising new lightweight high-temperature structural materials for aerospace applications, and they are expected to replace high-density nickel-based high-temperature alloys in many applications.
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