Mobility Database
PanTi2024_MB is an atomic mobility database for Ti-based alloys, which is compatible with the PanTi2024_TH thermodynamic database and suitable for the simulation of diffusion-controlled phenomena using the PanDiffusion module, PanEvolution module, and/or PanSolidification module.
Phases
The atomic mobility within the Liquid, Bcc, Fcc, and Hcp solution phases are assessed in this database.
Self-diffusivity of Pure Elements
The self-diffusivity of an element is usually described by an analytical expression. For the stable crystal structures, these expressions can be obtained using the available experimental data, while those for the metastable/unstable states are usually estimated from those of the stable states. In the following tables, we use different color to represent different status:
| : |
Validated |
|
| : |
Estimated |
|
| : |
No data |
|
Assessed Systems
In addition to the assessed self-diffusivities shown above, the impurity diffusion data for all elements included in the current mobility database are also assessed. Moreover, chemical-diffusivities available in some binary and ternary systems are also used to assess the interaction parameters. These binary and ternary systems are listed below for the Bcc and Fcc phases.
Fcc Phase
Bcc phase
Database Validation
The simulated concentration profiles of a series of Ti-base alloys are shown below to validate the current PanTi2024_MB database.
[2009Liu] Y. Liu, et al., Assessment of the diffusional mobilities in bcc Ti-V alloys. Journal of Alloys and Compounds, 470 (2009): 176-182.
[2011Li] W. Li, et al., Assessment of diffusion mobility for the bcc phase of the Ti-Al-Cr system. Calphad, 35 (2011): 384-390.