Additive manufacturing technology can break through the processing and design limitations of traditional processes and realize integrated forming of high-performance parts with complex structures. It has great application potential in aero engines and gas turbines. In this paper, for three types of alloys, including nickel-based superalloys, titanium-based alloys, and high-strength steels, the microstructure characteristics and control methods of laser processing parameters, composition modification, and external field are reviewed at first. Then the typical characteristics and comparison of mechanical properties are summarized, which provide an in-depth understanding of the mapping relationship between process parametersmicrostructure-mechanical properties of additive manufacturing alloys. Finally, the application status and typical cases of additive manufacturing of the above materials in key components are introduced. In addition, this paper also looks ahead at the new additive manufacturing technology, microstructure control technology, special alloy composition, and research on the process stability for key components in the field of aero engines and gas turbines, which can further promote the application of additive manufacturing technology.

additive manufacturing  /  jet engine  /  gas turbine  /  microstructure  /  mechanical property