The blades of GH4169 alloy used for a aeroengine experienced a bending deformation failure during the test.In order to know the mechanical properties of the blade body,analysis of microstructure and composition and tests including Brinell hardness,room temperaturetensile,650℃ tensile and 650℃ stress rupture life tests were carried out by sampling from the faulty blade tenon.The performance data were compared with that from the same batch of forging samples.The results show that there is no obvious abnormality in the microstructure and composition of the faulty blade.The Brinell hardness of the sample is not significantly different from results of the forging samples.Compared with the standard test rod test results,the tensile strength of the small size I-shaped sample taken from the tenon and decrease by about 4%at room temperature and 8%at 650℃ respectively and rupture life is significantly reduced by about 64%,but all are higher than the design requirements.Therefore,the material cause of the bending deformation failure of the blades can be initially eliminated.There is no significant difference in the mechanical properties from different fault blades indicating that the batch blade is stable.The basic data obtained from the sample taken from the blade body provides test data support for the analysis of the blade deformation fault,and the test method can also be applied to the relevant comparative test research.
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万方数据
