Study on Nondestructive Measurement of Internal Crystal Orientation in Oriented Crystalline Blade

In this paper, the short wavelength characteristic X-ray diffraction method is used to nondestructive determine the internal crystal orientation and distribution of oriented crystalline blade of nickel base superalloy. The principle of nondestructive determination is also described. By means of single point scanning, the nondestructive detection of crystal orientation distribution on a straight line inside the oriented crystalline blade is realized. By analyzing the diffraction peak width, the grain size in the scanning direction is measured. Combined with the internal crystal orientation and scanning test, it is determined that there are at least 5 grains with different orientations in the sample. The differentiation of grain boundary types is discussed through the gradient variation characteristics of crystal orientation angle. It lays a foundation for the application of short wavelength characteristic X-ray diffraction technology in nondestructive detection of crystal defects in oriented crystalline and single crystal blades.