A graphic reproduction of a metallic surface (a section of metal which has been ground, polished and etched) at a magnification of 10 diameters or greater. When reproduced by photography it is called a photo-micrograph. See METALLOGRAPHY.
A graphic reproduction of a metallic surface (a section of metal which has been ground, polished and etched) at a magnification of 10 diameters or greater. When reproduced by photography it is called a photo-micrograph. See METALLOGRAPHY.