The microstructural and mechanical anisotropy of metallic additive manufactured parts is well-established as the nature itself of the process induces the formation of columnar grains along the build-up direction. However, the effect of this anisotropy on the alloy machinability is rarely considered and a deeper understanding is needed. In the current study, Ti6Al4V prisms were fabricated by laser powder bed fusion in both vertical and horizontal orientation. After heat treatment, the prisms were slot milled at different cutting parameters to assess the influence of the build-up orientation on the surface quality, focusing on the surface topography. The results show that the skewness parameter can distinguish the machined surface of differently oriented AM parts and that the horizontal orientation allows for better machinability when considering the burrs height and the chip morphology.

金属添加剂制造零件的微观结构和机械各向异性是公认的，因为该过程本身的性质会诱导沿堆积方向形成柱状晶粒。但是，很少考虑这种各向异性对合金可切削性的影响，因此需要更深入的了解。在当前的研究中，通过激光粉末床熔合在垂直和水平方向上制造了Ti6Al4V棱镜。热处理后，将棱镜在不同的切削参数下进行槽铣，以评估堆积方向对表面质量的影响，重点是表面形貌。