Remaining Creep Life Assessment of Gas Turbine Blade Made of IN 792 ‎Nickel-Base Superalloy

During the operation, the turbine blades of hot gas path suffer service induced degradation due to ýdifferent causes such as creep, fatigue, oxidation, corrosion and etc. The present study was carried ýout the effect of long-term service at the high temperature exposure to remaining life assessment gas ýturbine blade made of Inconel 792 nickel base superalloy. That is investigated by studying on ýmicrostructure by optical and scanning electron microscopy, mechanical properties such as high ýtemperature tensile and stress-rupture test and stress analyses of turbine blade. The result has been ýshown the gamma prime rafting and TCP phase formation has occurred at the microstructure. ýBecause of long-term service at high temperature, stress- rupture properties of blade reduced and ýý20% lower than new IN 792 alloys. The stress analyses with ANSYS software and creep life ýassessment results by use Larson-miller parameter, the safety factor of blade lower than 1 and life ýtime of turbine blade is finished.ý