High-temperature and high-pressure circulating water constant-load extension experimental device with acoustic emission testing function

Abstract

The invention belongs to the technical field of material experiments, in particular relates to a high-temperature and high-pressure circulating water constant-load extension experimental device with an in-situ acoustic emission testing function and aims to solve the problems of stress corrosion test under the high-temperature and high-pressure water environment conditions and transferring and acquisition of an acoustic emission signal in the high-temperature and high-pressure water environment. The device comprises a high-temperature and high-pressure circulating water system, a constant-loadloading device, a control system and an acoustic emission signal acoustic emission monitoring system, wherein the high-temperature and high-pressure circulating water system provides a dynamic high-temperature and high-pressure water environment; the constant-load loading device performs constant-load extension on a sample in a high-pressure autoclave; the control system controls the high-temperature and high-pressure circulating water system; and the acoustic emission signal acoustic emission monitoring system is used for monitoring the sample in the high-pressure autoclave in an on-line mode. The device is simple in structure, convenient to use and maintain, can better meet experimental requirements, and provides important significance for development of the stress corrosion research ofa nuclear power material in the high-temperature and high-pressure water environment and improvement of the service security, reliability and economical efficiency of the key equipment of nuclear power plants in China.

Description

technical field [0001] The invention belongs to the technical field of material experiments, more precisely, relates to a constant-load tensile test device for high-temperature and high-pressure circulating water with in-situ acoustic emission testing. Background technique [0002] Stress corrosion of materials under high temperature and high pressure environment is a major problem faced by many fields, such as petroleum, chemical industry, electric power and other industries. At present, my country's commercial nuclear power plants mainly use pressurized water reactors. Since the service environment of pressurized water reactor nuclear power plants is high-temperature and high-pressure circulating water (280-325°C, 8-16MPa), its pressure boundaries include pressure vessels, steam generators, loop pipelines, and heat exchangers. The components are subjected to certain service stress, and the component materials may suffer serious environmental damage. Among them, stress corro...

AI Technical Summary

Problems solved by technology

First of all, solve the problem of the device for stress corrosion testing under high temperature and high pressure water environment, and the constant load tensile test is one of the effective test methods for stress corrosion research

Secondly, solve the problem of transmission and collection of acoustic emission signals in high-temperature and high-pressure water environments, because usually acoustic emission probes cannot be directly placed in high-temperature and high-pressure water environments to collect data

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