Titanium alloys exhibit complex, multi-phase microstructures which form during liquid-solid and solid-solid phase transformations. These phase transformations govern the microstructural evolution and are potentially more complex during additive manufacturing due to large thermal gradients and inhomogeneities. The prototypical fundamental unit of titanium microstructures are the α laths, and investigations into their three-dimensional morphology may provide new insights. A prior β-grain boundary, 3-variant clusters and interconnected laths were studied in 3D in electron-beam printed Ti-6Al-4V using a plasma FIB. These key features are of interest for studying variant selection in additive manufacturing.

中文翻译：

---

增材制造的 Ti-6Al-4V 中 α 板条形貌的三维电子背散射衍射研究

钛合金表现出复杂的多相微观结构，在液-固和固-固相变过程中形成。由于大的热梯度和不均匀性，这些相变控制着微观结构的演变，并且在增材制造过程中可能更加复杂。钛微结构的原型基本单元是 α 板条，对其三维形貌的研究可能会提供新的见解。使用等离子体 FIB 在电子束打印的 Ti-6Al-4V 中以 3D 方式研究了先前的 β 晶界、3 变体簇和互连板条。这些关键特征对于研究增材制造中的变体选择很有意义。