An application of differential interference contrast in metallographic examination

摘要

As one of the most exciting inspection and powerful analysis methods in modern materials metallographicexaminations, the difference interference contrast (DIC) method has many advantages, including relatively lowrequirement for specimen preparation, obvious relief senses observed under microscope. Details such as fine structuresor defects that are not or barely visible in incident-light bright field, could be easily revealed and thus make materialsanalysis more reliable. Differential interference contrast produces an image that can be readily manipulated using digitaland video imaging techniques to further enhance contrast. But, studies of material metallography based on DIC methodhave rarely carried out. Based on the fundamental principle of the DIC method combing with the computer imageanalysis, applications of DIC method in materials metallographic examination were investigated in this study