Development of a Dovetail Fretting Fatigue Fixture for Turbine Engine Materials (Preprint)

摘要

A unique dovetail fretting fatigue fixture was designed and evaluated for testing turbine engine materials at room or elevated temperatures. Materials from the cold section and hot sections of military turbojet engines were chosen for testing. The new fixture was improved over the previously used dovetail fretting fatigue fixture by including direct measurement of contact forces, alignment control, and elevated temperature capability. Measurement of the shear component of the contact force was validated through an alternative instrumentation method. Initial tests reveal interesting variability in the behavior of the nickel based superalloy specimens.