The lifetime of cyclically loaded devices is often limited by the fatigue resistance of their individual phases. An advanced method is presented for measuring the high-cycle fatigue behavior of materials at the micrometer scale using a nanoindenter. It is based on the cyclic deflection of focused ion beam-fabricated microcantilevers using the continuous stiffness method (CSM). In line with experimental data on bulk nanocrystalline copper, the specimens exhibit grain coarsening followed by the formation of extrusions and a fatigue strength exponent of −0.10. The method is suitable for characterizing single phases and individual components of further complex systems.

中文翻译：

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动态微悬臂弯曲的小规模高周疲劳试验

周期性加载的设备的寿命通常受到其各个相的抗疲劳性的限制。提出了一种先进的方法，用于使用纳米压头在微米级上测量材料的高周疲劳行为。它基于使用连续刚度法（CSM）的聚焦离子束制造的微悬臂梁的循环挠度。根据块状纳米晶铜的实验数据，样品表现出晶粒粗化，随后形成挤压，疲劳强度指数为-0.10。该方法适用于表征其他复杂系统的单相和单个组件。