fig12

Figure 12. (A) CBED pattern of the O phase; (B-D) Atomic-resolution HAADF images showing the α₂ and O phases along the [0001]_α2/[001]_O zone axis in a Ti-45Al-8.5Nb alloy annealed at 600 °C for 500 h (reproduced from Ref.[89]^[89]); (E) HAADF image of a Ti-42Al-8.5Nb alloy annealed at 650 °C for 2 h, displaying the same crystallographic orientation relationship. (Reproduced from Ref.[33]^[33]). CBED: Convergent beam electron diffraction; HAADF: high-angle annular dark-field.