theory the sample must be coated in a resin and then polished
until with a surface quality allowing the observation
under the microscope (of 100 with 2000x).
attack of the surface thus prepared with a corrosive solution
makes it possible to highlight the parts to be observed.
microstructure is generally revealed and observed in this way.
microstructure is the “genetic card” of material. It will
give information on its homogeneity, its mechanical state, its
purity, like on its mode of setting forms.
study has to recommend for all the problems encountered on
materials like for a regular quality control.