The effect of temperature and misfit on the coarsening behaviors of γ′ phase in the Co-12.5Ti alloy is studied by means of experimental observations and phase-field simulation. The experimental and simulated results show that the morphologies of γ′ phase evolve from spherical shape to rectangle shape as the aging time increases. Additionally, the average inter-precipitate distance increases with the temperature rises. Both the mean particle sizes and aspect ratio are increasing with the increasing of the temperature and misfit. The coarsening rate of γ′ phase obtained from simulations is 1.37 and 6.48 nm 3 /min for 700 and 750 °C, respectively, which is close to the results obtained from experiments. The coarsening rate of γ′ phase reduces as the misfit decreases at 750 °C. The simulation results are in good agreement with the experimental results.

中文翻译：

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温度和失配对 Co-Ti 合金中 γ' 沉淀的影响：相场建模和实验

通过实验观察和相场模拟研究了温度和失配对Co-12.5Ti合金中γ'相粗化行为的影响。实验和模拟结果表明，随着时效时间的增加，γ'相的形貌从球形演变为矩形。此外，平均降水间距随着温度的升高而增加。平均粒径和纵横比都随着温度和失配的增加而增加。700°C和750°C下模拟得到的γ'相粗化速率分别为1.37和6.48 nm 3 /min，与实验结果接近。γ'相的粗化率随着失配在 750°C 的降低而降低。模拟结果与实验结果吻合良好。