| Abstract Scope |
This study investigates the process–microstructure–property (PMP) relationships in Ti-6Al-4V components fabricated via laser hot-wire directed energy deposition (LHW-DED), integrating both experimental and simulation approaches. Using a single-wall geometry as the reference structure, interlayer delay was systematically varied to examine the influence of thermal accumulation on melt pool behavior, dimensional accuracy, microstructure, crystallographic texture, mechanical properties, and residual stress development in the as-built material. Microstructural and textural analyses were performed using imaging techniques, i.e., SEM and EBSD. Mechanical behavior was characterized through tensile testing and Vickers microhardness measurements, while anisotropic response associated with texture was evaluated using the viscoplastic self-consistent (VPSC) model. Residual stresses were assessed via neutron diffraction and the slitting method. Additionally, in-situ synchrotron X-ray diffraction was employed to study the effect of layerwise deposition on phase transformation kinetics under multipass laser scanning. Overall, this work offers a comprehensive understanding of the PMP relationships in LHW-DED Ti-6Al-4V. |