In the process of irradiation of materials by fluxes of heavy particles (protons, neutrons, alpha particles), damage to material structure is often observed. As a result of the accumulation of such damages, there is a subsequent change in the properties of materials, in particular, its embrittlement and hardening. Monitoring of the embrittlement process is important for nuclear reactor vessels exposed to high neutron fluxes. In this work, to observe the effect of heavy irradiation particles on the mechanical properties of metals, we propose to use vibrating wire resonators, in which the natural frequency of oscillations of the wire strongly depends on its tension. The change in the elastic characteristics of the wire alters the value of the natural frequency of wire oscillations. The natural oscillations are generated by a special circuit. Preliminary experiments to study the embrittlement effect of a stretched wire are performed by heating the wire with an electric current. In the case of short pulses, a significant increase in frequency is achieved, which is explained by the process of hardening of the material as a result of the thermal impact on the wire (rapid heating and cooling).

中文翻译：

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通过测量线振荡频率来监测金属线脆化

在重粒子流（质子、中子、α粒子）照射材料的过程中，经常观察到材料结构的破坏。由于此类损伤的累积，材料的性能随之发生变化，特别是脆化和硬化。监测脆化过程对于暴露于高中子通量的核反应堆容器非常重要。在这项工作中，为了观察重辐照粒子对金属机械性能的影响，我们建议使用振弦谐振器，其中振弦振动的固有频率很大程度上取决于其张力。线材弹性特性的变化改变了线材振动的固有频率值。自然振荡是由特殊电路产生的。通过用电流加热金属丝来进行研究拉伸金属丝脆化效应的初步实验。在短脉冲的情况下，频率显着增加，这是由于对线材的热影响（快速加热和冷却）导致材料硬化的过程来解释的。