Industrial Application of Creep/Fatigue Crack Initiation and Growth Procedures for Remaining Life Analysis of Steam Turbine Components

摘要

Two principal high temperature steam turbine component material degradation mechanisms are fatigue and creep damage. Accumulated over the operational time their combination can lead to crack initiation and growth resulting in leakage or rupture. The methods of creep-fatigue damage assessment are, therefore, important to prevent turbine failures and to quantify the remaining life of turbine components. This paper demonstrates an industrial application example of the steam components assessment in the frame of two criteria diagram (2CD) approach and FAD approach.