Heat Treatment and Metallurgy Lab

Getting together SAMPLE PREPARATION:- Selecting a representative sample of the materials Sectioning the sample to avoid altering or destroying the structure of interest Mounting the section without damage to the test sample Grinding to achieve a flat sample with a minimum amount of damage to the sample surface Polishing the mounted and ground sample Etching in the proper etchant to reveal the microstructural details SELECTING Selecting a representative test sample to properly characterize the microstructure or the features of interest is a very important first step. For example, grain size measurements are performed on transverse sections, whereas general microstructure evaluations are performed on longitudinal sections. Therefore, it is important to provide the laboratory with information about the orientation or the rolling direction of the test specimen. SECTIONING Test samples are carefully sectioned to avoid altering or destroying the structure of the materials. If an abrasive saw...