Abstract Machining accuracy can be compromised by elastic workpiece deformation and subsurface residual stress introduction during cutting. In order to anticipate the impact of cutting forces and surface integrity evolutions on finished surface and its geometrical errors, it is necessary to better understand the influence of cutting conditions and tool wear. In this study, machinability of Inconel 718 using a round carbide tool in finish turning conditions is assessed. Cutting forces evolution during tool life are analysed and accompanied by advanced investigations of cutting phenomena. An original mechanistic cutting force model is developed, identified and tested. It includes the effect of tool wear over time in its local formulation. This model allows predicting cutting forces evolution along tool pass for a wide range of finishing cutting conditions. Furthermore, a thorough analysis of residual stress profiles at different tool wear levels is led. It features quantitative results for fresh and worn tools. A study on the influence of cutting parameters and tool wear on residual stress profiles in the machining affected zone is highlighted.

中文翻译：

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Inconel 718 在车削过程中的可加工性：考虑刀具磨损的切削力模型，对表面完整性的影响

摘要 切削过程中工件的弹性变形和亚表面残余应力的引入会影响加工精度。为了预测切削力和表面完整性演变对成品表面及其几何误差的影响，有必要更好地了解切削条件和刀具磨损的影响。在这项研究中，评估了 Inconel 718 在精车条件下使用圆形硬质合金刀具的可加工性。对刀具寿命期间的切削力演变进行了分析，并伴随着对切削现象的高级研究。开发、识别和测试原始机械切削力模型。它在其局部公式中包括了工具磨损随时间的影响。该模型允许在各种精加工切削条件下预测沿刀具路径的切削力演变。此外，还对不同刀具磨损水平下的残余应力分布进行了全面分析。它具有新旧刀具的定量结果。重点研究了切削参数和刀具磨损对加工影响区残余应力分布的影响。