We are excited about two manuscripts from the 3D Additive team that were recently accepted for publication.
In this electron microscopy-based investigation of a CrMnFeCoNi high-entropy alloy manufactured by selective laser melting, the authors focused on a systematic investigation of the microstructural evolution along the build direction. A hierarchy of microstructures was found, such as the formation of nanocrystalline grains, elemental segregation and precipitation, cellular dislocation structures, deformation twinning, and deformation-induced phase transformation. The results helped to better understand the relationships between thermal histories, microstructural evolution, and mechanical properties, which provides guidance for future microstructural manipulation of materials fabricated by additive manufacturing.
In this work the authors are investigating Ti-6Al-4V samples prepared using an ARCAM EBM system, to explore the complex, multi-phase microstructures which form during the manufacturing process. The paper presents the first 3D-EBSD dataset of EBM Ti-6Al-4V, with one of the findings showing a basket-weave α microstructure that is far more interconnected than previously reported. Furthermore, 3-grain clusters were observed and their boundary character was determined. This research highlights the importance of 3D characterisation in understanding the evolution of complex microstructures during additive manufacturing.