Abstract The lifetime of coated cutting tools is decisively influenced by residual stress gradients across cutting edges. Here, cross-sectional X-ray nanodiffraction with a beam size of 35 × 25 nm2 was used to retrieve gradient properties of a ~2 µm thick TiN coating on WC Co substrate. The planar regions next to the edge exhibit gradual and constant stress profiles with anisotropic defect build-ups on the flank and rake faces, respectively. Directly at the edge, nonlinear lateral and cross-sectional compressive residual stress gradients up to about −3 GPa were observed. The coating's 〈111〉 fibre texture orientation correlates with the orientation of principal stress components.

中文翻译：

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WC Co 上 TiN 涂层切削刃区域的纳米级残余应力和微观结构梯度

摘要 涂层刀具的寿命受切削刃上残余应力梯度的决定性影响。在这里，使用光束尺寸为 35 × 25 nm2 的横截面 X 射线纳米衍射来检索 WC Co 基板上约 2 µm 厚的 TiN 涂层的梯度特性。边缘附近的平面区域呈现出逐渐和恒定的应力分布，分别在后刀面和前刀面上形成各向异性缺陷。直接在边缘处，观察到高达约 -3 GPa 的非线性横向和横截面压缩残余应力梯度。涂层的<111> 纤维纹理取向与主应力分量的取向相关。