Microstructure and high-temperature creep behavior of nano-strengthened superalloys

High-temperature alloys have become an indispensable material in aerospace, automotive, and energy industries due to their outstanding high-temperature strength and creep resistance. However, the growing requirements for the superalloys underscores the necessity of enhancing their performance. In recent years, nano strengthening technology has been introduced into high-temperature alloys to further improve their performance. The incorporation of nanoparticles can not only refine grains and uniform microstructure, but also improve the strength, hardness, corrosion resistance, tensile properties, and creep behavior. In order to realize the wider application of nanoparticle-reinforced superalloys in the future, this review systematically summarizes the influence of nano-strengthening technology on the microstructure and high-temperature creep resistance of superalloys. It addresses the limitations of traditional methods and deeply discusses the specific mechanisms of nano-strengthening through process routes and strengthening methods. This review aims to promote the innovative development of superalloys and provide theoretical support for the research of next-generation high-performance high-temperature alloys.