High Temperature Alloys for Gas Turbines

THE wide range of creep resistant nickel‐base alloys now available has been developed primarily for use at elevated temperatures in the gas turbine engine. These products replaced the Cr.Ni. stainless steels used at high temperatures in the very early days of gas turbine development. Early work in the UK led to the introduction of the NIMONIC series of alloys. The first, NIMONIC alloy 75, was used by Whittle more than 30 years ago and was one of the alloys that made the gas turbine engine a practical proposition.