航空发动机钛合金线性摩擦焊研究进展OA

Titanium alloys are universally recognized as the prime option for core load-bearing structures in aero-engines,owing to their remarkable blend of high strength,low density,exceptional creep resistance,and outstanding corrosion resistance.The reliability of titanium alloy joints has a direct bearing on the operational safety and service life of aero-engines.Linear friction welding(LFW),an efficient solid-state joining technique that is precisely tailored to the precision manufacturing requirements of aero-engines,offers substantial benefits such as near-net shaping,minimal welding flaws,and excellent joint integrity.It facilitates the high-quality and consistent bonding of titanium alloy components and plays a pivotal role in the fabrication and repair of complex,integrated components like blisks.This paper centers on the research and application demands of LFW technology for aero-engine components.It provides an in-depth review of the progress in titanium alloy LFW across four key areas:process experimentation,physical simulation,finite element numerical modeling,and post-weld heat treatment.It systematically summarizes the current research status and identifies the existing challenges in each field.Moreover,the paper points out future research directions,including the evaluation of long-term service performance,multi-scale numerical simulations ranging from the microstructural to the macroscopic level,and the optimization of modified LFW process parameters.These efforts are crucial for promoting the wider industrial application of titanium alloy LFW technology.