Fig. 2: The anomalous twin formation and SFs ribbon slip with chemical inhomogeneity.
From: Three-dimensional network of multi-fold twins enabled by geometrically necessary amorphous zones
a Atomic structure of ∑9 GB at the multi-fold twin junction. Scale bar, 2 nm. b FFT pattern corresponding to the region in a. Scale bar, 2 nm−1. c–f The HRTEM images viewed from [011]matrix presenting the coupled expansion-migration of two TBs meeting at a multi-fold twin junction. Burgers circuit analyses in (f) show Frank partial dislocations at the TB. The orange overlays in the HRTEM images were generated by adjusting hue and saturation based on the original micrographs to highlight structural features. Scale bar, 2 nm. g–l The HAADF-STEM image of atomic structure, taken along [110] zone axis, and corresponding EDS maps for individual elements of Fe, Co, Ni, Cu and Zn, show how the five elements are distributed on an atomic scale at the multi-fold twin junction. Scale bar, 1 nm. m Line profiles of the atomic fractions of each element at the junction, extracted along the orange arrow in the HAADF-STEM image.
