The versatility and potential applications of additive manufacturing have accelerated the development of additive/subtractive hybrid manufacturing methods. LPBF processes are exceptionally efficient at producing complex-shaped, thin-walled, hollow, or slender parts; however, finishing machining operations are necessary to ensure part assembly and surface quality. Rapid solidification during LPBF processes generates columnar grain structures in alloys. This is associated with crystalline textures and anisotropy, and therefore, mechanical properties are highly dependent on space directions, thus affecting cutting force and its variability.

In this study, theoretical and experimental analyses examined the effects of LPBF parameters on cutting forces and the anisotropy of alloys. Therefore, an oblique cutting Taylor based model was proposed to quantify the crystallographic effects on the shear strength. For this, the tool geometry, tool position, and laser scanning strategy were considered along with the microstructures, crystallographic textures and grain morphologies of two samples with different layer thicknesses (low-volumetric energy density (VED) and high-VED) using scanning electron microscopy and electron backscatter diffraction. Peripheral milling operations had been performed under 54 experimental conditions to evaluate the interactions between the machining parameters along with the layer thickness and the microstructural characteristics of printed alloys. The analysis revealed a significant interaction between the direction of the plane of the shear band and the grain orientation along the main axis. Three milling configurations were evaluated. The effects of the layer thickness on the evolution of the cutting force were elucidated. Additionally, the low-VED sample exhibited higher anisotropy in the cutting force compared to the high-VED one. The anisotropy in the latter corresponds to a high, dense <001> ring-like texture; however, the crystallographic effect is lower in the low-VED sample. A good correlation between the cutting force fluctuation and the predicted Taylor factor was obtained. Lastly, the grain boundary density was acceptably correlated with the level of cutting force for both the printed cases.

增材制造的多功能性和潜在应用加速了增材/减材混合制造方法的发展。LPBF 工艺在生产复杂形状、薄壁、中空或细长零件方面非常有效；然而，精加工操作是确保零件装配和表面质量所必需的。LPBF 过程中的快速凝固在合金中产生柱状晶粒结构。这与晶体结构和各向异性有关，因此，机械性能高度依赖于空间方向，从而影响切削力及其可变性。

在这项研究中，理论和实验分析检验了 LPBF 参数对切削力和合金各向异性的影响。因此，提出了一种基于斜切泰勒的模型来量化晶体学对剪切强度的影响。为此，考虑了工具几何形状、工具位置和激光扫描策略，以及使用扫描电子的具有不同层厚度（低体积能量密度 (VED) 和高 VED）的两个样品的微观结构、晶体结构和晶粒形态。显微镜和电子背散射衍射。在 54 个实验条件下进行了周边铣削操作，以评估加工参数与层厚度和打印合金的微观结构特征之间的相互作用。分析揭示了剪切带平面方向和沿主轴的晶粒取向之间存在显着的相互作用。评估了三种铣削配置。阐明了层厚度对切削力演变的影响。此外，与高 VED 样品相比，低 VED 样品在切削力方面表现出更高的各向异性。后者的各向异性对应于高、致密的<001>环状结构；然而，低 VED 样品的晶体学效应较低。获得了切削力波动与预测的泰勒因子之间的良好相关性。最后，晶界密度与两种印刷外壳的切削力水平之间的相关性是可以接受的。