superalloy

Superalloys are high-strength, complex alloys designed to withstand extreme temperatures and mechanical stress, with excellent surface stability. They are crucial in aerospace, particularly in gas-turbine engines, where components face high heat, corrosive gases, and significant loads.1

These alloys are typically categorized into nickel-based, cobalt-based, and iron-based types, with nickel-based superalloys being most common in jet engine turbines. Their desirable properties are achieved through the addition of elements like cobalt, chromium, aluminum, and titanium. While some stainless steels can operate at high temperatures, superalloys are employed for even more demanding applications, often based on nickel or cobalt with minimal iron content, capable of functioning at up to 80 percent of their melting point.12