alloys resistant to creep, fracture and fatigue stress.

摘要

Improved, creep-stress rupture and hold-time fatigue resistant nickel base alloys for use at elevated temperatures are disclosed. The alloys are suitable for use as turbine disks in gas turbine engines of the type used in jet engines, or for use as rim sections of dual alloy turbine disks for advanced turbine engines and are capable of operation at temperatures up to about 1500oF. The alloys contains (wt %) IMAGE The alloys are solution treated above the gamma prime solvus temperature, followed by cooling at a rate suitable to prevent cracking and finally aged.