Abstract The report presents studies using: positron annihilation spectroscopy, electron backscattering diffraction (EBSD), and scanning electron microscopy (SEM) of a subsurface zone induced by a dry sliding test performed on pure molybdenum. In the zone dislocations and divacancies which concentration decreases with the depth increase from the worn surface have been found. However, after a long sliding test period, the cluster size increases to about five vacancies. SEM and EBSD observations revealed a fine grained 10 μm thick tribolayer adhering to the worn surface. Grains in this layer are randomly oriented, their size is less than 0.5 μm. On closer inspection, the continuous dynamic recrystallization process in this layer was identified. However, below a layer with elongated very thin grains with serrated boundaries was found clearly. Its microstructure is typical for dynamic geometric recrystallization. This layer, several micrometers thick, is an intermediate layer that separates the tribolayer from the base material of the sample.

中文翻译：

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使用正电子湮没和 EBSD 技术检测纯钼摩擦层中的动态再结晶

摘要 该报告介绍了使用正电子湮没光谱、电子背散射衍射 (EBSD) 和扫描电子显微镜 (SEM) 对由对纯钼进行的干滑动试验引起的地下区域的研究。在区域中发现了位错和双空位，其浓度随着磨损表面深度的增加而降低。然而，经过长时间的滑动测试后，集群大小增加到大约五个空缺。SEM 和 EBSD 观察显示附着在磨损表面上的细粒 10 μm 厚摩擦层。该层中的晶粒是随机取向的，它们的尺寸小于 0.5 μm。仔细观察后，确定了该层中的连续动态再结晶过程。然而，在具有锯齿状边界的细长的非常薄的晶粒的层之下被清楚地发现。其微观结构是动态几何再结晶的典型特征。该层有几微米厚，是将摩擦层与样品的基材分开的中间层。