Abstract

The manifestation of the indentation size effect as well as the change in elastic modulus of the Fe–20 wt % Cr alloy under nanoindentation in the annealed and irradiated (with 2 MeV electrons) state are studied. It is found that, within the range of the measurement results, all experimental points fit on one curve of the corresponding dependences. From this, it is concluded that there is no effect of irradiation on the nanocharacteristics of the alloy. A peaked modular effect is found—a sharp increase and then a rapid decrease in the elastic modulus of the alloy during nanoindentation. The thickness of the layer in which this effect is manifested does not exceed ~1500 nm. A noticeable experimental scatter in the measurement results is explained by the possible formation of a developed relief of the surface during annealing.

中文翻译：

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Fe-20Cr合金纳米压痕下的峰模效应

摘要

研究了在退火和辐照（带有2 MeV电子）状态下，纳米压痕下压痕尺寸效应的表现以及Fe-20wt％Cr合金的弹性模量的变化。可以发现，在测量结果的范围内，所有实验点都拟合在一条相应依存关系的曲线上。由此得出结论，辐照对合金的纳米特性没有影响。在纳米压痕过程中，发现了一个模块化的峰值效应，即合金的弹性模量急剧增加，然后迅速减小。表现出这种作用的层的厚度不超过〜1500nm。测量结果中明显的实验性分散是由于退火过程中可能形成的表面凸凹形成。