Extended Data Fig. 2: ADF-STEM analysis of 4Cu, 0Cu and 3Cu annealed at 760 °C for 5 min.
From: Facile route to bulk ultrafine-grain steels for high strength and ductility
a, ADF image (left) of 4Cu showing a high density of nanoprecipiates, and the corresponding SAED pattern (right) showing only the matrix reflection of the [110]fcc zone axis without any extra reflection of the precipitates. b, ADF image of 0Cu showing an average grain size of 2.2 μm. c, ADF image of 3Cu presenting a UFG structure with a high density of nanoprecipitates. No elemental segregation at grain boundaries was detected.
