fig3

Figure 3. TEM evidence for reverted-austenite morphologies reconstructed in TL-480-600: (A) Bright-field (BF) image with a Ni-segregated region outlined; regions for SAD are marked; (B) Dark-field (DF) image highlighting austenite-containing regions, including interconnected cellular austenite (dotted arrows) and granular austenite (solid arrows); (C and D) SAD patterns acquired from the marked regions; (E) Schematic illustration of segregation-guided austenite growth relative to the cellular template, where arrow length qualitatively indicates the relative local driving force for the depicted migration process, inspired by the concept in Ref.^[19]. SAD: Selected-area diffraction; TEM: transmission electron microscopy; FCC: face-centered cubic.