Figure 3
From: Dislocation Strengthening without Ductility Trade-off in Metastable Austenitic Steels

Phase boundary as effective dislocation source.
(a,b) TEM image sequence of an in-situ deformed solid solution treated metastable austenitic steel. The electron beam is along the [011]α. Scale bar: 200 nm. (c,d) TEM image sequence of an in-situ deformed TMT samples with 20% thickness reduction. The phase boundary are marked by the solid lines. The dashed line in (d) locates the original phase boundary in (c). The direction of the step-wise propagation is indicated by the arrows in (d). Scale bar: 200 nm.