Modern Mechanical Engineering, 2018, 8, 221-232 http://www.scirp.org/journal/mme ISSN Online: 2164-0181 ISSN Print: 2164-0165 DOI: 10.4236/mme.2018.84015 Oct. 19, 2018 221 Modern Mechanical Engineering Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades Ebigenibo Genuine Saturday 1 , Thank-God Isaiah 2 1 Department of Mechanical Engineering, University of Port Harcourt, Port Harcourt, Nigeria 2 Department of Mechanical Engineering, Niger Delta University, Wilberforce Island, Amassoma, Nigeria Abstract This paper presents the creep-fatigue interaction life consumption of industrial gas turbine blades using the LM2500+ engine operated at Pulrose Power station, Isle of Mann as a case study. The linear damage summation approach where creep damage and fatigue damage are combined was used for the creep-fatigue interaction life consumption of the target blades. The creep damage was mod- elled with the Larson-Miller parameter method while fatigue damage was as- sessed with the modified universal slopes method and the damage due to creep-fatigue interaction was obtained from the respective life fractions. Because of the difficulty in predicting the life of engine components accurately, relative life consumption analysis was carried out in the work using the concept of creep-fatigue interaction factor which is the ratio of the creep-fatigue interaction life obtained from any condition of engine operation to a reference creep-fatigue interaction life. The developed creep-fatigue interaction life consumption analy- sis procedure was applied to 8 most of real engine operation. It was observed that the contribution of creep to creep-fatigue interaction life consumption is greater than that of fatigue at all ambient temperatures. The fatigue contribution is greater at lower ambient temperatures as against higher ambient tempera- tures. For the case study, the overall equivalent creep-fatigue factor obtained was 1.5 which indicates safe engine operation compared to the reference condition. The developed life analysis algorithm could be applied to other engines and could serve as useful tool in engine life monitoring by engine operators. Keywords Creep Damage, Fatigue Damage, Creep-Fatigue Interaction, Creep-Fatigue Interaction Factor 1. Introduction Gas turbine blades, especially the compressor turbine blades of aero derivative How to cite this paper: Saturday, E.G. and Isaiah, T.-G. (2018) Creep-Fatigue Interac- tion Life Consumption of Industrial Gas Turbine Blades. Modern Mechanical Engi- neering, 8, 221-232. https://doi.org/10.4236/mme.2018.84015 Received: September 15, 2018 Accepted: October 14, 2018 Published: October 19, 2018 Copyright © 2018 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). http://creativecommons.org/licenses/by/4.0/ Open Access