Fig. 9: The stacking fault energy calculation of AuCu alloy NW.
From: Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires
a Schematic diagram of the twin formation pathway in the AuCu alloy. Starting from the initial face-centered cubic (FCC) lattice, a one-layer intrinsic stacking fault (ISF), two-layer extrinsic stacking fault (ESF), and three-layer twins are created by introducing Shockley partials with \({{{{{\bf{b}}}}}}\) = \(1/6 < 112 > \) on the adjacent {111} plane. b Generalized stacking fault energy (GSFE) curve of the RSS AuCu alloy along the twin formation pathway. c The distribution of unstable planar fault energies for three selected paths: FCC-to-ISF, ISF-to-ESF, and ESF-to-twin, corresponding to \(\Delta {{{{{{\rm{\gamma }}}}}}}_{1}\), \(\Delta {{{{{{\rm{\gamma }}}}}}}_{2}\), and \(\Delta {{{{{{\rm{\gamma }}}}}}}_{3}\) in (b), respectively.
