Creep is the tendency of a solid material to move slowly or deform permanently under stress. Creep takes place over time and results from long-term exposure to stress levels, and is particularly pronounced in materials subjected to close to the materials melting point. For example, a non-creep resistant turbine blade used in a high temperature environment may creep over time, contact the housing and damaging the blade. Therefore, creep resistant materials play a critical role in many applications including jet engines, heat exchangers, nuclear power plants and kilns. Component failures are often the result of creep.
Another important property of a superalloy is corrosion resistance. Corrosion resistance arises from the formation of a protective oxide layer which protects the underlying material. Superalloys are commonly used in gas turbine engines in areas of the engine that are subject to high temperatures, requiring high strength, excellent creep resistance, as well as corrosion and oxidation resistance. Nickel-based superalloys typically constitute 40 to 50% of the total weight of an aircraft engine.
When ultra light, high strength components are needed, customers look for Secorp Metals commercially pure titanium such as SE-10, SE-20 and SE-30. The combination of its physical properties and technology makes titanium indispensable for today’s and tomorrow's aircrafts.