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- Title
Diffusivities and Atomic Mobilities in BCC Ti-Fe-Cr Alloys.
- Authors
Huang, Yi; Nie, Jingjing; Bai, Weimin; Hu, Songsong; Wang, Xinming; Zhang, Ligang; Liu, Libin
- Abstract
In this research, the diffusion behaviors within the Ti-Fe-Cr ternary system were examined at the temperatures of 1273 K and 1373 K through the diffusion couple technique. This study led to the determination of both ternary inter-diffusion and impurity diffusion coefficients in the body-centered cubic (bcc) phase for the Ti-Fe-Cr alloy, utilizing the Whittle–Green and Hall methods. The statistics show that the average diffusion coefficients D ˜ F e F e T i and D ˜ C r C r T i measured at 1273 K were 1.34 × 10−12 and 3.66 × 10−13, respectively. At 1373 K, the average values of D ˜ F e F e T i and D ˜ C r C r T i were 4.89 × 10−12 and 1.43 × 10−12. By adopting the CALPHAD method, a self-consistent database for atomic mobility in the bcc phase of the Ti-Fe-Cr system was established. This database underwent refinement by comparing the newly acquired diffusion coefficients with data from the existing literature. Diffusion simulations for the diffusion couples were performed, drawing on the established database. The error between the simulated diffusion coefficient and the experimental measurement data is within 15%, and the simulated data of the component distance distribution and diffusion path are in good agreement with the experimental data. The simulations generated results that aligned well with the observed experimental diffusion characteristics, thereby affirming the reliability and accuracy of the database.
- Subjects
BODY centered cubic structure; DIFFUSION coefficients; DATABASES; TERNARY system
- Publication
Materials (1996-1944), 2024, Vol 17, Issue 8, p1927
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma17081927