The Distinctions in X-ray Images of Directional Crystal Turbine Blade Intergranular Crack and Grain Boundary Diffraction fringes

The principium and character of crystal boundary crack and diffraction stripe of the turbine vane of directional crystal were introduced. Through the test and analysis of radiographic testing between crystal boundary crack and diffraction stripe, it was shown that diffraction stripe image varied with exposure condition, while change of crystal boundary crack image was less.