An in-depth understanding of the development of α phase have been proposed in a β-quenched Ti-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe alloy during continuously heating process. Acicular α, striated α and string-like α were displayed at different temperatures. The acicular α formed at 390 °C gathered together in parallel to form clusters, which originated from the assisted nucleation of ω clusters. The striated α formed at 570 °C showed highly strained lattice inside with unique satellite reflections, referring to the displacive-diffusion formation mechanism of α phase. The string-like α formed at 690 °C was the result of the impingement of individual α phase. These results provided new insights into the phase transformation mechanism in the near β titanium alloys.

对β-淬火Ti-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe合金在连续加热过程中α相的发展进行了深入了解。针状α、条纹α和弦状α在不同温度下显示。在 390°C 形成的针状 α 平行聚集在一起形成簇，这源于 ω 簇的辅助成核。在 570 °C 形成的条纹 α 显示内部高度应变的晶格，具有独特的卫星反射，指的是 α 相的位移扩散形成机制。在 690 °C 形成的弦状 α 是单个 α 相撞击的结果。这些结果为近β钛合金的相变机制提供了新的见解。