Fig. 2: Characteristics of inclusions in TM and TMA tested steels.

a Macroscopic distribution of inclusions in TM steel. (a1) Planar microscopic morphology and elemental distribution of “mosaic” inclusions in TM steel. (a2) Cross sectional morphology of inclusions in TM steel. (a3) Cross sectional morphology and elemental distribution in (a2). b Macroscopic distribution of inclusions in TMA steel. (b1) Planar microscopic morphology and elemental distribution of “core-shell” inclusions in TMA steel. (b2) Cross sectional morphology of inclusions in TMA steel. (b3) Cross sectional morphology and elemental distribution in (b2).