Surface Integrity of Cryogenically Finished Additively Manufactured and Conventional Ti-6Al-4V Alloy

Additive manufacturing (AM) is used for the fabrication of solid components complex geometries customized applications. However, AM-fabricated frequently require finishing operations such as abrasive grinding, which causes a different surface characteristic compared to conventionally manufactured components. Thus, it essential study effect process parameters and heat treatment on quality AM because these may behave differently conventional In this study, characteristics samples Ti-6Al-4V with cryogenically cooled operation that processed samples. The under investigation were fabricated by two methods, namely, Direct Metal Laser Sintering (DMLS) processing. processes characteristics, microhardness, roughness, X-ray diffraction (XRD), mechanical properties has been studied. average roughness from cryogenic grinding was reduced 27.25% 23.15% AM, 30.08% 29.13% samples, dry moist conditions, respectively. finished DMLS showed increase microhardness 14.07%, 14.27%, 17.54% 17.48%, 8.06%, 38.68%, in dry, moist, DOC table feed increased, greater peak broadening observed. XRD indicates significant level plastic deformation occurred suggests are more sensitive process. Compared found have smallest grains layer just below surface. impact cooling higher