Research Progress on Fatigue, Corrosion and Mechanical Properties of Advanced Superalloys

Dear Colleagues,

The further improvement of the thrust–weight ratio has generated high requirements for turbine disks due to the rapid development of the aeronautics and astronautics industry. Turbine disks, one of the most important hot-end components in aeroengines, withstand the combined effects of mechanical and thermal stresses. Turbine disks must possess perfect resistance to thermal–mechanical cyclic loadings so as to withstand the superposition of centrifugal loadings and thermal stresses. Nickel-based superalloys have been extensively utilized in turbine disks due to their high temperature oxidation resistance, hot corrosion resistance, thermal fatigue resistance, persistent strength and creep resistance when employed in extreme environments. However, nickel-based superalloys can experience thermal-induced strains or stresses and suffer from the interaction of fatigue, creep and oxidation, which easily give rise to thermo-mechanical fatigue (TMF) during takeoff and landing processes. As a specific type of fatigue, TMF may lead to such hot-end components exhibiting a limited lifetime compared with isothermal fatigue due to the effect of additional deformation and damage mechanisms under varying temperature conditions. The TMF of nickel-based superalloys has garnered increasing attention in recent years due to the many factors that affect these fatigue behaviors and their relationship with the application of turbine disks.

This Special Issue welcomes the submission of articles on the fatigue life, corrosion and mechanical properties of superalloys and high-temperature composites.

Dr. Hexin Zhang
Guest Editor

Manuscript Submission Information

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• nickel-based superalloys
• thermo-mechanical fatigue
• high-temperature oxidation
• hot corrosion