Transmission electron microscopic (TEM) in situ mechanical testing has become a widely utilized tool for simultaneously measuring mechanical properties and understanding fundamental deformation mechanisms in irradiated and nuclear materials. Although tensile and compression specimen geometries are among the most common, opportunities remain for investigating alternative geometries that could provide unique insights into the plasticity of irradiated materials. This work demonstrates a new TEM in situ cantilever beam configuration. Cantilevers are produced from as-received and proton-irradiated (1 dpa, 500°C) Fe-9%Cr oxide dispersion-strengthened steel. Flow stress is measured using a TEM in situ depth-sensing mechanical testing holder. A 200-MPa increase in flow stress is measured due to irradiation. Size effects arise when the intrinsic (i.e., microstructural) size approaches the extrinsic (i.e., external dimensions) size and can be described using a power law relationship as a function of the material microstructure and cantilever dimensions.

中文翻译：

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使用 TEM 原位悬臂梁评估辐照对 Fe-9%Cr ODS 中流动应力的影响的方法

透射电子显微镜 (TEM) 原位机械测试已成为一种广泛使用的工具，用于同时测量机械性能和了解辐照材料和核材料的基本变形机制。虽然拉伸和压缩试样的几何形状是最常见的，但仍有机会研究替代几何形状，这些几何形状可以为辐照材料的塑性提供独特的见解。这项工作展示了一种新的 TEM 原位悬臂梁配置。悬臂由原样和质子辐照 (1 dpa, 500°C) Fe-9%Cr 氧化物弥散强化钢制成。使用 TEM 原位深度传感机械测试支架测量流动应力。由于辐照，测量到流动应力增加了 200 兆帕。当内在的（即，