|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
||On Enhancing the Mechanical Properties of DED Fabricated Ti–6Al–4V by Boron Addition and In-situ Reheating
||Kavindu Wijesinghe, Ajit Achuthan
|On-Site Speaker (Planned)
Additive manufacturing (AM) technologies for metals and alloys, in many cases, yield inferior mechanical properties under as-built conditions. The inferior properties are generally attributed to the large columnar grains with the strong texture of AM fabricated parts. This study investigates two methods to enhance the mechanical properties of directed energy deposited (DED) Ti-6Al-4V alloy. The first method involves modifying the material chemistry by boron addition up to 1.5 wt%, while the second method involves in-situ reheating. Specimens with various amounts of boron additives and subjected to in-situ reheating are printed. Then, their mechanical properties and microstructure are characterized using various experimental techniques. Preliminary results show that increasing boron addition decreased anisotropy gradually. Likewise, the in-situ reheating process improved tensile properties. Efforts to derive a comprehensive understanding of the mechanism responsible for the influence of boron addition and in-situ reheating on microstructure refinement and mechanical properties are currently ongoing.
||Additive Manufacturing, Titanium, Mechanical Properties