Stress corrosion tensile sample adopting ion irradiation to simulate neutron irradiation and preparation method of stress corrosion tensile sample

Abstract

The invention belongs to the field of the preparation of stress corrosion tensile samples, and particularly relates to a stress corrosion tensile sample adopting ion irradiation to simulate neutron irradiation and a preparation method, which is used for studying stress corrosion sensitivity of an irradiated material so as to evaluate the service performance of the material in a high-temperature high-pressure water environment of a nuclear power plant. The tensile sample comprises parallel portion scale distance section with a rectangular cross section, a tangential transitional arc portion and a threaded connection clamping portion. The preparation method comprises the following steps: (a) preparing a sample unit body; (b) grinding by using abrasive paper; (c) manually polishing; (d) ultrasonically cleaning; (e) pre-observing; and (f) performing EBSD detection. The stress corrosion tensile sample provided by the invention can uniformly receive the ion irradiation, and can effectively enable the influence of the irradiation to be prominent; the preparation method is simple, the practicability is high, and the cost is low; and the preparation method can effectively avoid the change of chemical components on the surface of the sample.

Description

technical field [0001] The invention belongs to the field of preparation of stress corrosion tensile samples, specifically a stress corrosion tensile sample suitable for ion irradiation to simulate neutron irradiation and a preparation method thereof, and mainly studies metals (including alloys, and can also be used for other materials) The stress corrosion behavior after irradiation is further used to study the stress corrosion sensitivity of materials after irradiation, so as to evaluate the service performance of materials in the high temperature and high pressure water environment of nuclear power plants. Background technique [0002] Feedback from the operation experience of in-service nuclear power plants shows that materials such as austenitic stainless steel in the core have been in service for a long time in strong neutron irradiation and high-temperature, high-pressure water corrosion environments, and radiation-induced stress corrosion cracking (IASCC) will occur. ...

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Problems solved by technology

On the other hand, the traditional uniaxial loading tensile test mostly uses rod-shaped tensile specimens, and the size is large

Considering the small effective irradiation area and effective penetration ability of the ion beam, the traditional stress corrosion tensile specimen is not suitable for evaluating the stress corrosion susceptibility of the irradiated material.

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