Figure 4

TEM investigation of the VLE1, VLE4 and CLE2 samples. Micrographs showing the typical martensite lath spacings and general view of the existing strengthening particles detected at the VLE4 sample heads in the H1150 bar (a,b); in the sample VLE4 tested at 427 °C (c,d). A significant number volume of rounded shaped oxides is shown in (b). Microstructure of the head of samples tested at 482 °C: VLE1, (e,f); CLE2, (g,h). Mean lath spacing is showed in (e); semi-coherency of ε-phase with αʹ matrix is documented by indexed SAEDP added to (f).