Fig. 1 Heat treatment process of the experimental steel

Fig. 2 Hardness profiles of the specimens with different RRs as a function of aging time at 480 °C

Fig. 3 Optical and TEM images of the sample after solid solution treatment at 1050 °C for 1 h: a optical microstructure, b BF-TEM image and corresponding SAED pattern taken from the matrix oriented at [111] zone axis

Fig. 4 Inverse pole figure (IPF) maps of specimens with different RRs: a US, b S50 and c S90

Fig. 5 Distributions of misorientation angle of specimens with different RRs: a US, b S50, c S90, d change of misorientation angle

Fig. 6 a, b BF-TEM images of S90 aged for 24 h, c corresponding SAED patterns taken from the matrix oriented at [011] zone axis, d BF-STEM image and STEM-EDS maps of Ni, Ti, Mo, Cr and Co

Fig. 7 Isosurfaces of 4 at.% Ti concentration in different conditions: a US aged for 1 h, b S90 aged for 1 h, c US aged for 72 h, d S90 aged for 24 h

Fig. 8 Isosurfaces of 6 at.% Mo concentration in different conditions: a US aged for 1 h, b S90 aged for 1 h, c proximity histograms of S90 aged for 1 h, isosurfaces of 6 at.% Mo concentration and 4 at.% Ni concentration plus proximity histograms of Ni3Ti and Mo-enriched precipitates in deformation d US aged for 72 h and e S90 aged for 24 h

Fig. 9 a, b isosurfaces of 25 at.% Cr concentration in US and S90 aged for 1 h, respectively. c, d isosurfaces of 25 at.% Cr concentration plus proximity histograms of the Cr-enriched precipitates in US aged for 72 h and S90 aged for 24 h, respectively

Fig. 10 MWH plots for specimens with different RRs at different aged conditions using the dislocation contrast factor of the best-fit method

Fig. 11 Dislocation density of the specimen with different RRs at different conditions

Fig. 12 Strengthening model of specimen with different RRs at different aged conditions