Superalloys; are types of alloys developed from VIII-A group elements in general, showing high surface stability, high corrosion resistance, high mechanical properties and high performance under high temperature conditions. These alloys are usually composed of various combinations of nickel, cobalt, iron and high chromium elements, and contain molybdenum, Wolfram, aluminum and titanium elements that melt at high temperatures in small amounts.
Super alloys have a high resistance under high temperatures, that is, they have a high thermal resistance. Super alloys have high oxidation and corrosion resistance at high temperatures, have superior rupture and friction resistance.
15%-20% of superalloys are miteryals with superior corrosion resistance and high amounts of chromium.
History of Super Alloys
The first examples of superalloys are modified versions of austenitic stainless steels, and many superalloys that we use today were developed between 1950 and 1970.
By the 1980s, advances in technology allowed superalloys to combine some elements. These alloys, which can be added with different elements, have acquired many specific mechanical properties that are demanded today, such as high temperature resistance.
Where are Super Alloys Used?
Superalloys, which were developed for use on gas turbines in the 1900s, are used in many areas of industry today. These alloys are generally used in the following areas:
Aircraft and Gas turbines
Thermal power plants
In rocket engines
In the petrochemical industry
Steam power units
In the maritime field (ships and submarines)