Measurement of Residual Stress in Turbine Blade of Nickel Base Directionally Solidified Superalloy

The stress states of turbine blade of nickel base directionally solidified superalloy were measured by LXRD. The exact value of d0 was not necessary in the process of stress measuring. It could be applied in the practical engineering that the stress were solved through measuring crystal plane spacing of different crystal planes which belonged to same crystal plane fancily by simply changing space azimuth angle χ and φ, which not only eliminated the effect of the inaccuracy of crystal spacing with no stress loaded in traditional measuring method, but also simplified the measurement steps.