The study of micro-structures indicates, to some extent, that how desirable the processes performed on the materials has been. That is because the integrity and disintegrity, structure and resulting phases of materials are visible under microscopes. Meanwhile, by using micro-hardness we can indicate the structural changes in each step of the process; knowing the hardness at each point can help us recognize the formed phases. Especially for the welding students one of whose important tests is micro-hardness graph in the welding zone.

      · Optical microscope

      · Polishing machine

      · Cutting machine

      · Metallography camera

      · Indentation micro-hardness device

      · Metallography image processing software