Agradecimentos: The authors thank the National Council for Scientific and Technological Development (CNPq) for the financial support and Omnitek BR for providing the samples. This work was supported by the National Council for Scientific and Technological Development (CNPq), award number: 133231/2019-4 Ver menos

Abstract: In order to obtain miniaturised products, additive manufacturing (AM) combined with micromachining presents a great potential on reducing manufacturing costs and material waste. The machinability of metals in general is well known for conventional machining processes. However, for micromachining processes, there are still gaps regarding the material’s behaviour. Likewise, the machinability of materials obtained by additive manufacturing still needs to be investigated. In this context, the present work aims to compare the micromilling process of an additive manufactured Ti6Al4V alloy produced by laser powder bed fusion (LPBF) and a commercial wrought Ti6Al4V alloy. The samples were examined through scanning electron microscope (SEM), energy-dispersive x-ray spectroscopy (EDS), and Vickers hardness measurements. No statistical differences were obtained when comparing the machining forces, burr formation, and surface roughness when micromilling the AM and wrought alloys. It was observed that the minimum chip thickness was not achieved in the experiments with higher tool diameter and lower feed per tooth, which led to a different workload on each edge of the tool. Better surface roughness was obtained in the combination of higher cutting speed and lower tool diameter. The experiments with lower material removal rate led to higher burr formation. From these analyses, it is possible to better understand the machinability of the Ti6Al4V alloy produced by AM Ver menos