Ti6Al4V produced by selective laser melting (SLM) is replacing the use of casting workpieces as it is a net-near shape process that can maintain its mechanical and biocompatibility properties and it can produce scaffolds geometry reducing the workpiece weight. Typically, the microstructure produced by SLM differs from casted workpieces, the surface roughness of SLM is also different is also higher compared to casted pieces. If it is needed precision and smooth surfaces, it is necessary to add machining after SLM, especially for the production of channels smaller than 1 mm, which is the case of micromilling. For the definition of micromilling, it is not recommended to use the ones indicated for meso scale and there are few studies on the micromilling of Ti6AL4V implants produced by SLM. This study compares the machinability of the standard commercial Ti6Al4V with produced by SLM during micromilling process using different feed per tooth configurations (from 0.5 to 4.0 $\mu$m). The analysis of machinability considered cutting forces, surface roughness, burr formation analysis and microchips morphology. Despite presenting higher strength and hardness, SLM material presented higher machinability with lower forces, lower surface roughness and less burs, explained by the SLM microstructural of fined acicular $\alpha$’ martensite due to the rapid cooling of the material.

通过选择性激光熔化（SLM）生产的Ti6Al4V替代了铸造工件的使用，因为它是一种近净形状的工艺，可以保持其机械和生物相容性，并且可以产生降低工件重量的支架几何形状。通常，由SLM产生的微观结构与铸造工件不同，与铸造件相比，SLM的表面粗糙度也有所不同。如果需要精密和光滑的表面，则必须在SLM之后添加机械加工，特别是对于小于1 mm的通道生产，这是微铣削的情况。对于微铣削的定义，不建议使用用于介观尺度的方法，关于SLM生产的Ti6AL4V植入物的微铣削研究很少。$\mu$m）。可加工性的分析考虑了切削力，表面粗糙度，毛刺形成分析和微芯片形态。尽管具有较高的强度和硬度，但SLM材料仍具有较高的机械加工性，较低的作用力，较低的表面粗糙度和较少的毛刺，这是由细针状的SLM显微组织解释的$\alpha$由于材料的快速冷却，马氏体。