FRETTING FAILURE OF TURBINE BLADES IN A TURBOJET ENGINE:A CASE STUDY

摘要

Abstract Gasturbines operate at extreme conditions, often at the design limits of turbine blades which are more likely to experience failures than other less stressed parts. Cases of blade failures are studied for a turbo jet engine in service. Small-amplitude relative oscillatory sliding displacements between the contacting surfaces of blade and disc are known as fretting and it arises as a result of cyclic loading of one of the contacting members. The paper presents case studies of fretting failure in turbine blades and suggests remedial measures to prevent such failures.