Fig. 5
Local chemical ordering (LCO)-induced strengthening. a The average activation barriers associated with the nanoscale segment detrapping process. For visualization, data for Ta = 950 and 650 K are horizontally shifted by −0.01 and 0.01 GPa, respectively. The calculated data points are fitted using \(Q\left( \tau \right) = Q_0\left( {1 - \frac{\tau }{{\tau _{{\mathrm{ath}}}}}} \right)^\alpha\), where Q0, τath, and α are fitting parameters. Error bars correspond to the standard deviations of each data point. b The average activation volume at 300 K (see Supplementary Note 6 for calculation details). c The average activation (shear) stress at 300 K as a function of strain rate. These average activation (shear) stress can be considered as the intrinsic shear strength, which for RSS is ~70 MPa (red point) at 10−3 s−1 (comparable with experiments). With increasing LCO (or decreasing Ta), the intrinsic shear strength is predicted to increase, demonstrating LCO-induced strengthening
