fig15
![Development of robust surfaces for harsh service environments from the perspective of phase formation and transformation](https://image.oaes.cc/6fdf97ea-ef8f-4210-ac0b-4962c57383cc/4323.fig.15.jpg)
Figure 15. (A) Solvus temperature (Tγ’-solvus) and (B) area fraction (Aγ’-area fraction) of γ’ phase in the Co-V-Ta alloy annealed at 800 °C for 600 h, as predicted using machine learning, with the γ and γ’ phase boundaries demarcated in the isothermal section of the Co-V-Ta system at 800 °C established using the CALPHAD approach. (C) Dark-field image and (D) selected area diffraction pattern obtained from the γ+γ’ region in the Co-V-Ta alloy annealed at 800 °C for 648 h. Figure reproduced from Ref.[83] with permission from Elsevier.