Aviation Machinist’s Mate (AD) Advancement Practice Exam

Turbine blades are typically made from very specific high-performance alloys that can withstand extreme temperatures and stresses experienced during operation. The correct answer indicates that steel is used; however, it’s more accurate to specify that turbine blades are most commonly made from nickel-based superalloys rather than just steel, which are known for their ability to maintain strength and resist corrosion at high temperatures.

Nickel-based superalloys possess exceptional fatigue resistance and can maintain their structural integrity in some of the most demanding conditions, such as those found in jet engines. These materials are specially formulated to endure the thermal stresses that occur during operation and to resist deformation, oxidation, and thermal fatigue.

The other options, such as aluminum, titanium, and copper, may have their applications in aviation, but they do not meet the stringent requirements for turbine blade materials in high-performance engines like those found in aircraft. While titanium is used in some components, it does not have the temperature resistance that nickel-based superalloys provide in turbine blades. Therefore, the materials chosen for manufacturing turbine blades reflect the need for durability, heat resistance, and overall performance in high-stress environments.