Metallography is the study of the structures of metals and alloys. This is commonly performed with the aid of microscopy. Examination of etched structures of metals and alloys at a micro level provides information on the crystalline grain structures, distribution of structural phases and impurities (metallic and non-metallic) that exist within a given sample. The post-processing of metallographic findings gives valuable insight on physical properties and thermal treatment regimes.
At Donhad, samples are extracted with the aid of a metallurgical cut-off saw, upon completion samples undergo grinding and polishing until a surface finish of 1 micron is attained, chemical reagents are then mixed up to etch the sample followed by microstructural examination under a microscope at 250X and 500X magnification.