Mechanical Properties Test And Cyclic Plastic Constitutive Model Establishment Of Superalloy Material For Aeroengine Turbine Disk

Aeroengine is regarded as the Pearl of industry,involving many subjects,complicated mechanical structure and many parts,which plays a decisive role in the safety and reliability of aircraft.The turbine disk of the engine has a complex operating environment in the course of its service.It bears not only complex mechanical load,but also thermal load,cyclic load,etc.,which makes it prone to fatigue failure.With the continuous improvement of aeroengine performance,the service life,reliability and other requirements of engine turbine disk are gradually improved.In order to meet these requirements,a lot of tests are needed.These experiments not only need a lot of human and financial resources,but also time-consuming.Therefore,it is the most direct and effective way to reduce the test cost to study more simple and efficient test methods.At the same time,with the development of computer and commercial finite element simulation software,simulation is gradually becoming an important auxiliary means to solve practical problems.Simulation of practical problems will further reduce the cost of the test.ABAQUS has a rich interface of secondary development,which can realize the secondary development of materials with complex constitutive model and complete the simulation calculation of materials.The GH4169 superalloy specimens used in this paper are made of turbine disk forgings.The monotonic tensile test,low cycle fatigue test and stress-strain response test were carried out with these specimens.In the stress-strain response test,the innovative test method is used,which greatly reduces the test time and the number of samples needed.In this paper,Hill48 yield criterion and A-F constitutive model are used to simulate the stress-strain response curve using innovative test method and monotonic tensile test at 400℃ and 650℃.By comparing the experimental results with the simulation results,the validity of the A-F constitutive model for the low cycle stress-strain response curve is verified.