Study of solid-state phase transformations during additive manufacturing of Ti6Al4V

X-ray diffraction was used to study solid-state phase transformations, lattice strain evolution, and evolution of crystallographic defects and texture due to Solid-State Thermal Cycling (SSTC) in situ during Laser Metal Deposition (LMD) of Ti6Al4V. To perform the experiments we have developed a novel mini-LMD machine dedicated to synchrotron beamlines. Microstructure evolution due to SSTC during LMD of Ti6Al4V using different LMD parameters and residual stresses measurement in each sample after cooling down to room temperature were investigated.