Metallography

Sample preparation for materialographic investigations

The preparation of samples for the materialographic investigation includes working steps such as cutting, embedding, grinding, polishing, and etching.

Determination of the grain size and the volume fraction in multiple-phase structures

Determination of the grain size number and the grain size of metallic and ceramic materials based on standard methods as well as the volume fraction in multiple-phase structures by point count with picture documentation.

Determination of non-metallic inclusions in metals

Characterization and determination of the non-metallic inclusions of non-etched sections of metallic materials with documentation.

Please read more about Determination of non-metallic inclusions in metals in our  Newsletter No. 13

Determination of precipitated phase contents

Estimation of the contents of precipitated phases such as delta ferrite, sigma phase and iron beta phase using standard series and documentation.

Intergranular corrosion test ASTM A262 practice A and E

The test is used to detect intergranular attack in austenitic stainless steels. The oxalic acid etch test practice A is used as a method to rapidly screen certain grades of stainless steel. Practice E (Strauss test) is conducted to determine the susceptibility of austenitic stainless steel to intergranular attack associated with the precipitation of chromium-rich carbides.

Measurement of coating thickness

Measurement of the local thickness of metallic coatings and oxide layers by investigating the cross-sectional surface by means of a light microscope with documentation.