State-of-the-Arts of Thermo-Mechanical Coupling Behavior in Linear Friction Welding Process
GENG Peihao 1,2,3, QIN Guoliang 1,2
(1. Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials, Ministry of Education, Jinan 250061, China； 2. School of Materials Science & Engineering, Shandong University, Jinan 250061, China； 3. Joining and Welding Research Institute, Osaka University, Osaka 567-0047, Japan)
Abstract：As a typical solid-state joining technology, the linear friction welding (LFW) process has gradually been the key manufacturing technology of bladed discs in advanced aircraft engines because of its advantages of environmental friendly, high efficiency and high quality. In linear friction welding process, the mechanical energy was transformed to heat energy by means of alternative friction, and make the materials reach to the plastic state and be welded, in which, thermomechanical coupling is the basis of the linear friction welding process and determines the microstructures and properties of the joint. The inherent characteristics of thermo-mechanical coupling behavior in LFW, and the corresponding numerical simulation methods are introduced, and a more comprehensive literature review of the state-of-the-arts of thermomechanical coupling of the LFW process is summarized, which can provide the guidelines for the studies on thermomechanical coupling behaviors in LFW. Finally, the problems and development prospects of numerical simulation of thermo-mechanical coupling in LFW are discussed to provide some ideas for the future research.