Research on Thermo-mechanical Fatigue Life Prediction Model of Ni-base Superalloy
In phase TMF tests on nickel-based high-temperature alloy GH4169,a commonly used material for engine hot end components,under conditions of 200-450 ℃ and 400-650 ℃ is conduc-ted.Considering the micro damage strain energy of polycrystalline materials in the elastic stages under the condition of TMF,a TMF life prediction model suitable for polycrystalline materials was pro-posed,model parameters were determined by combining the TMF test data.Three superalloys,GH4169,IN718,DD8,were used to evaluate the TMF life prediction ability of this model.The pre-diction accuracy of the life model is higher than that of the Manson-Coffin model and Ostergen model commonly used for TMF life prediction.
国家科技期刊平台
NSTL
万方数据
维普
