Abstract:Inertial friction welding (IFW), as an advanced solid-state welding process, has been widely applied in the manufacturing of aero-engine rotor components due to its green, efficient, and superior welding quality. This paper systematically summarizes the research achievements of scholars in recent years regarding the microstructure, mechanical properties, and numerical simulation of IFW joints of aviation titanium alloys and superalloys. It also summarizes the application of large-tonnage, high-precision IFW equipment in various types of advanced aero-engine rotor components. Future research should focus on addressing key technical challenges in the engineering application of new materials and new structures. The paper also presents prospects for future development, highlighting that continuous innovation of IFW technology will provide critical technical support for achieving the high performance, lightweight design, and enhanced reliability of the new generation of aero-engines.