Method of developing material microstructure for evaluating grain site and apparatus for making the same

摘要

Evaluation of a grain size by indentation-graphical system is based on experimental material permanent deformation using indentation method. The system comprises an indentation device (1) with an indenter (2) of spherical shape or an indenter (3) of toroidal shape, a back plate (4) with a circular opening or a back plate (5) with a ring-shaped groove, and a test specimen (6) with a surface to be investigated. The microstructure development is carried out by compressing or forcing out the investigated surface by the indenter to thereby accentuate borders of grains and sub grains. Subsequent evaluation of grain size in the investigated surface takes place in the indentation contact area or in the region of indentation by making use of optical methods.