Research Progress and Prospect of Laser Shock Peening Technology in Aero-engine Components

Because of hostile service environment and complicated working loads, aero-engine components are apt to high-cycle fatigue fracture, which seriously affects security and reliability of aero-engine. Laser shock peening, LSP, is a novel surface plastic-strengthening technology. High-cycle fatigue performance can be improved effectively under the action of compressive residual stress and microstructural modification. LSP has been widely applied in the batch production and maintenance of aero-engine components. Research status, application situation and problems to be resolved of laser shock peening on fan/compressor blade, turbine blade, turbine disk, cartridge receiver, hydraulic actuator, pipe, gear and so on were discussed deeply. The development tendency of laser shock peening research on aero-engine components in recent years was analyzed and concluded. The future work on equipment, technique, mechanism and application of laser shock peening on aero-engine components was taken an outlook. In future, hope that the large-scale industrial application of laser shock peening on aero-engine components could be realized under the synergistic action of the whole industry and the whole technology chain. © 2021 Journal of Mechanical Engineering.