The Microstructural Characterization of Dual Phase Steel with the Method of Chemical Etching

In dual phase steels, the microstructure consists of a ferrite matrix and martensite islands along the grain boundaries of the ferrite. In this study, the microstructures of dual phase steels with different chemical compositions are characterized by applying different etchants and by using optical and electron microscopy. The most successful result was obtained with LePera and Na-metabisulfite etchants, which were applied using a special method.