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The Effect of Temperature and Misfit on γ′ Precipitation in Co-Ti Alloys: Phase-Field Modeling and Experiments

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Abstract

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 nm3/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.

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Acknowledgments

This work was supported by National Key R&D Program of China (Grant 2017YFB0702901), Key-Area Research and Development Program of GuangDong Province (Grant 2019B010943001), the National Natural Science Foundation of China (Grant 51571168), the Fundamental Research Funds for the Central Universities (Grants 20720170038, 20720180072).

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Authors and Affiliations

  1. College of Materials and Fujian Provincial Key Laboratory of Materials Genome, Xiamen University, Xiamen, 361005, People’s Republic of China

    Cuiping Wang, Jianhong Huang, Hufan Kong, Yong Lu & Xingjun Liu

  2. Institute of Materials Genome and Big Data, Harbin Institute of Technology, Shenzhen, 518055, Guangdong, People’s Republic of China

    Xingjun Liu

  3. Department of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, 518055, Guangdong, People’s Republic of China

    Xingjun Liu

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  1. Cuiping Wang
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Correspondence to Yong Lu or Xingjun Liu.

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Wang, C., Huang, J., Kong, H. et al. The Effect of Temperature and Misfit on γ′ Precipitation in Co-Ti Alloys: Phase-Field Modeling and Experiments. J. Phase Equilib. Diffus. 41, 15–26 (2020). https://doi.org/10.1007/s11669-019-00775-3

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