Significance of the Complicated Failure Analytical Study and the Corrosion and Protection on High-Temperature Components for Environmental and Energy Machineries

Abstract

On the viewpoint of practical service condition for various environmental and energy machineries such as gas turbine, jet engine and boiler, a significance of considering the complicated failure factors of the hot-section components was demonstrated in order to assure the durability and reliability of them. In particular, some examples were presented about the aggressive environmental effect on the creep and/or fatigue strength properties associated with the characteristic natures of failure manners on the basis of failure analysis. Material system design concept including the coating system for high-temperature components were also proposed together with the microstructural control toward to further progress in high-efficiency of advanced machineries, according to the concept of the learning a lesson from the past and failure.