Hot-Spin Tests of Bladed Jet-Engine Rotors

The creep-rupture and ductility characteristics of materials are of utmost importance to the designer of high-temperature rotating parts. The authors have pointed out the significance of ductility of materials used for gas-turbine disks. Four-bladed disks were tested in a facility that was designed to spin the rotors in as near engine operating conditions as possible. These parts were tested in accordance with a predetermined schedule of temperature gradient, temperature, and speed. Test results are analyzed, and a discussion of the advantages and the design of such a facility is also included.