Microstructural evolution during dynamic recrystallization of 3041 steel

The relatively new technique of electron back scattered diffraction (EBSD) supposes a clear improvement in the observation of microstructural features as it gives extensive quantitative information. Particularly, the present communication is focused on the observation by EBSD of the microstructure evolution of an AISI-304L steel during dynamic recrystallization. The EBSD technique showed that twin boundaries are playing an important role in DRX, as their surface fraction varies in a different manner depending on the DRX type: much more twins are apparent in the DRX cyclic case with a steady state misorientation distribution very close to that of the initial state. Meanwhile, the misorientation distribution in the single peak type shows major differences: a higher ratio of small misorientations (lower than 15 ) and lower twin ratio are evident. (orig.)