Figures & data
Figure 1. SEM observations of the current alloy after different heat treatments: (a) solid-solutionized at 1473 K for 2 h, (b–f) aged at 973 K for 48 h, 100 h, 200 h, 500 h, and 1000 h, respectively.
Figure 2. TEM characterization of the current alloy aged at 973 K for 48 h. The bright-field (BF) image (a) and the corresponding dark-field (DF) image (b) show that the cuboidal B2 nanoprecipitates are dispersed into the BCC matrix; HRTEM image and FFT patterns (c, c-1, c-2) exhibit that the B2 particle is coherent with the BCC matrix.
Figure 3. Elemental distribution of the 48 h-aged alloy mapped with EDS equipped in DB-FIB.
Figure 4. (a) Variation of the mean particle radius r3 with the aging time at 973 K for the current alloy, FBB8, and Ti-modified FBB8, where the corresponding linear fitting curves are also shown; (b) variation tendency of the microhardness HV and B2 particle radius r in the current alloy with aging time at 973 K; (c) engineering tensile stress-strain curves at 973 K of the aged alloy for 24, 48, and 100 h.
