Non-uniform distribution of plastic strain in duplex steel during TEM in situ deformation

Transmission electron microscopy (TEM) in situ straining experiments were carried out on duplex ferritic–austenitic steel. Localization of strain as a common feature during slip transfer from the austenite to the ferrite has been noticed. The character of strain localization depends on the orientation relationship between the phases. A possible influence of the TEM specimen geometry on the mechanism of plastic deformation of the ferritic–austenitic steel was considered by comparing the results with those of in situ straining experiments have been performed in a 1 MV high-voltage TEM instrument.