Application of phase contrast microradiography in NDT

Practical aspects of microfocal X-ray image enhancement utilizing phase contrast effects are considered. Optimization of the experimental technique to achieve phase contrast is described for application to the nondestructive testing of materials. Experimental phase contrast images of porosity and corrosion pits obtained with a 5 μm (2 x 10 -4 in.) micro focal X-ray source are compared with attenuation contrast images demonstrating significant enhancement of image quality. The phase contrast X-ray imaging provides enhanced image contrast, improved edge definition and X-ray phase information on the material.