Metallographic Sectioning

ASM Heat Treating Society                

Metallographic Sectioning Sectioning a specimen for metallographic examination can alter the material condition at the test location.

 

Ideally, changes in microstructure from the sectioning process should be avoided. However, because some hot and cold working inevitably occurs from most sectioning methods, compromises must be made to get the job done. The damage to the specimen during sectioning depends on the material being sectioned, the nature of the cutting devise used, the cutting speed and feed rate, and the amount and type of coolant used. On some specimens, surface damage near the cut is inconsequential and can be removed during subsequent grinding and polishing. The depth of damage varies with material and sectioning method.