Development Of Test And Simulation And Experimental Platform For Thermal Cycle Performance Of Superalloy Material S

Because of the complexity of space environment and changeability,conventional materials often can not meet the actual needs.It is necessary to develop new materials with special composition,special proportion and special processing technology.The research and testing of new materials,especially the thermal cycling resistance performance of alloys in high temperature air environment,has become an important part of the development of space technology.It is also very important to test the oxidation resistance and thermal cycling resistance of alloy materials in civil,industrial and other fields.It is very important to develop a simple,accurate and fast simulation and test platform for the thermal cycle resistance of alloy materials in high temperature air environment.In this paper,a two-dimensional transient heat transfer model on the surface of alloy samples during thermal cycling is deduced and the boundary conditions for solving the temperature distribution are determined.A theoretical model for numerical calculation of two-dimensional transient heat transfer model is established by using finite element theory.The finite element numerical calculation of heat transfer model is realized by COMSOL software,and the simulation model of temperature field distribution on sample surface is established.An experimental platform for thermal cycling experiments of alloy samples was built,including heating and temperature measurement system,temperature control system,data processing and control system.The thermal cycle process of three kinds of alloy samples was simulated by using the established simulation model.In addition,for the alloy materials which may be oxidized,the thermal cycle process under different oxidation thickness was simulated,and the surface temperature field distribution and temperature change curve under different conditions were finally obtained.The experimental and simulation results show that the developed thermal cycle simulation platform can accurately simulate the surface temperature field distribution of alloy samples during thermal cycle,and the developed experimental platform can test the thermal cycle performance of real alloy samples.