WC-Co hard metals are increasingly used in parts with more complex and highly fatigue loading situations. This requires a transition of material strength data provided by the manufacturer to the actual component. The method of the effectively loaded volume and surface has proven to work well for several static loading conditions and component sizes. This work provides evidence that this method can also be used with cyclic loading conditions. Specimen with three different effectively loaded volumes and surfaces have been exposed to monotonically increasing, as well as high cycle fatigue loads under four-point bending. The effectively loaded volumes and surfaces match the found characteristic fracture strengths as well as the logarithmic numbers of cycles to failure. A theoretical transition from the characteristic fracture strength to the fatigue limit across different geometries is demonstrated and matches the experimental data.

WC-Co 硬质合金越来越多地用于具有更复杂和高度疲劳载荷情况的零件。这需要将制造商提供的材料强度数据转换为实际组件。有效加载体积和表面的方法已被证明适用于多种静态加载条件和组件尺寸。这项工作提供的证据表明，该方法也可用于循环加载条件。具有三种不同有效载荷体积和表面的试样已暴露于单调递增以及四点弯曲下的高周疲劳载荷。有效加载的体积和表面与发现的特征断裂强度以及失效循环的对数相匹配。