Fig. 7: Generalized SF energies of the {2\(\bar{2}\)01} plane and {11\(\bar{2}1\)} plane in the D019 phase, and corresponding critical resolved shear stress (CRSS) calculation of their slip systems.
From: Enhancing the strength and ductility of a medium entropy alloy through non-basal slip activation
a, d Atomic arrangements and slip directions in the pyramidal I (a), and pyramidal II (d) slip systems. b, e γ Surfaces of pyramidal I plane (b), and pyramidal II plane (e). The atomic packing scheme on each slip plane is overlaid on top of the γ surface. Note that the minimum energy path (MEP) for planar slip in the pyramid I slip system (b) is along the short arrows (cyan), rather than the long Burger’s vector. c, f Illustration of slip systems in the D019 unit cell of pyramidal I plane (c), and pyramidal II plane (f) (not all atoms are shown). g, h MEPs of pyramidal I plane (g), and pyramidal II plane (h) calculated by embedded atom method (EAM) and density functional theory (DFT). The slip paths are indicated by short arrows in (b) and (e), respectively. i CRSS calculation for pyramidal I slip system by molecular dynamics (MD). The <2c + a> superdislocation dissociates into superpartials and is separated by an antiphase boundary (APB) area, consistent with the MEP calculations and similar to ref. 89. Source data for (g) are provided as a Source data file. MD trajectory data and script for (h) are provided in the Supplementary Data.
