In this work, diffusion couples of bcc phase Ti-Nb-V have been prepared and annealed at different temperatures such as 1273, 1373, and 1473 K. The concentration profile of each diffusion couple was measured with the help of electron microprobe analysis. In addition, the interdiffusion coefficients were obtained from the concentration profiles of diffusion couples, using numerical inverse and Whittle–Green methods. Combining with the thermodynamic database, the atomic mobilities of Ti, Nb and V in bcc Ti-Nb-V alloys were simulated by DICTRA package. In summary, our simulated atomic mobilities have a nice correlation with the experimental data and can reasonably describe the diffusion phenomena, such as diffusion paths and the concentration profiles of the bcc Ti-Nb-V ternary system.

中文翻译：

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Ti-Nb-V 体系中 bcc 相的原子迁移率评估

在这项工作中，已经制备了 bcc 相 Ti-Nb-V 的扩散偶并在不同的温度（例如 1273、1373 和 1473 K）下退火。在电子探针分析的帮助下测量了每个扩散偶的浓度分布。此外，相互扩散系数是从扩散偶的浓度分布中获得的，使用数值逆和惠特尔 - 格林方法。结合热力学数据库，采用DICTRA软件包模拟了bcc Ti-Nb-V合金中Ti、Nb和V的原子迁移率。总之，我们模拟的原子迁移率与实验数据具有很好的相关性，可以合理地描述扩散现象，例如 bcc Ti-Nb-V 三元体系的扩散路径和浓度分布。