This work is motivated by the fact that friction has a significant impact on the microstructures of titanium forged parts, further influencing their mechanical properties. In this paper, a 3D FE model is developed to investigate the phase transformation characteristics of Ti-6Al-4V turbine blade in the hot forging process. Then, the effect of friction conditions on temperature and phase transformations within the forged blade are analyzed numerically and verified by experiments. The results reveal that compared with a less influence on lamellar α + β phase, a good lubricated condition obviously increases the average volume fraction of α phase, while decreases the average values of temperature and β phase volume fraction as well as the distribution uniformities of α and β phases.

这项工作的动机是摩擦对钛锻造零件的微观结构有重大影响，从而进一步影响了它们的机械性能。本文建立了一个3D有限元模型，以研究Ti-6Al-4V涡轮叶片在热锻过程中的相变特性。然后，数值分析了摩擦条件对锻造叶片内温度和相变的影响，并通过实验进行了验证。结果表明，与对层状α+β相的影响相比，良好的润滑条件明显增加了α相的平均体积分数，同时降低了温度和β相体积分数的平均值以及α的分布均匀性和β相。