3D-printed Ti6Al4V alloy by selective laser melting: a study of surface quality, dimensional accuracy, and mechanical characteristics

Tóm tắt

In this study, essential characteristics of selective laser melting (SLM)-printed parts (surface quality, mechanical properties, and dimensional accuracy) were evaluated simultaneously for potential practical applications. Parts were fabricated using industrially validated processing parameters recommended by the machine manufacturer to establish a comprehensive baseline assessment of manufacturing quality. Surface topography measurements showed relatively high surface roughness (Sa 8.60 µm, Sz 70.34 µm), mainly due to inherent SLM process characteristics. Compared to wrought Ti6Al4V, the fabricated Ti6Al4V exhibited higher tensile strength. The hardness of the printed parts (37.5 ± 1.1 HRC) suggests good wear resistance. Dimensional analysis revealed deviations ranging from approximately −25 µm to −200 µm, corresponding mainly to tolerance grades IT9-IT12. The roundness was in the range of 25 - 50 µm, while the coaxiality was approximately 27.7 µm. These results provide useful insights into the quality and limitations of SLM-printed Ti6Al4V parts for further investigation.