Design of X-ray stress tester for engine blade detection

Aiming at the problem of stress detection for special-shaped parts such as nickel-based single crystal engine blades, an X-ray stress tester was designed and developed. The X-ray stress tester obtained the original data of the diffraction spectrum by X-ray scanning, so as to determine the actual diffraction angle 2θ corresponding to the test crystal plane. After rough scanning, the pole figure was drawn. According to the imaging position of the pole figure, α and β were determined. At least 6 points were scanned by Psi and Phi scanning functions. The obtained α and β were compared with the pole figure data one by one to exclude mismatched points. The accurate α and β were input into the program to obtain the corresponding 2θ peak value. Finally, multiple sets of 2θ were substituted into the calculation formula to obtain the stress tensor of the crystal plane. The results show that the X-ray stress tester could be well applied to the detection of special-shaped parts such as nickel-based single crystal engine blades.