Liquid-state in-situ corrosion fatigue device and testing method

Abstract

The invention provides a liquid-state in-situ corrosion fatigue device and a testing method. The device comprises a panel, a side plate, a guide pipe, a fixed platform and a sealing part. The liquid-state in-situ corrosion fatigue device has the advantages that a flow speed of a corrosion solution can be adjusted through changing the power of a submersible pump. The liquid-state in-situ corrosionfatigue device has good sealing performance, can be repeatedly utilized for long time, has certain corrosion resistance and has certain tolerance on inorganic acid and alkali type corrosion media; theliquid-state in-situ corrosion fatigue device is low in cost, simple in structure and easy to process and assemble; the testing method provided by the invention is combined, and a test sample can bemonitored in real time in a liquid in-situ corrosion fatigue experiment process. The testing method can be used for eliminating influences, caused by the corrosion solution, on DIC (Density IndicatingController) information acquisition quality; good analysis precision can be ensured. The testing method is simple in steps and is easy to operate.

Description

technical field [0001] The invention belongs to the technical field of material in-situ corrosion fatigue research, in particular to a liquid in-situ corrosion fatigue device and a testing method. Background technique [0002] In practical engineering applications, fatigue and corrosion of materials often occur at the same time. This form of failure is called corrosion fatigue, which leads to cracking of materials at low stress levels. This form of damage has no symptoms and is more likely to cause serious safety hazards. In order to study this kind of actual damage condition, it is necessary to provide a corrosion environment for the sample by the in-situ corrosion device while bearing the fatigue load, and maintain a good seal for a long time under the dynamic load to avoid the leakage of the corrosive medium, which is of great importance The in-situ corrosion device puts forward higher design requirements. At present, there are few design methods of corrosion equipment, ...

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Problems solved by technology

At present, there are few design methods of corrosion equipment, and its overall adaptability to samples of different shapes needs to be improved

In addition, due to the complex environment of the sample during the in-situ corrosion fatigue test, the corrosion equipment and corrosive liquid will cause difficulties in the real-time information collection of the sample

[0003] The Chinese patent application whose publication number is 106596384 discloses a corrosion solution circulation system for metal material corrosion fatigue experiments, and the Chinese patent application whose publication number is 206002043 discloses a corrosion fatigue test device based on a partial labor test machine, although These two devices can realize in-situ corrosion fatigue test in liquid environment, but they are poorly adaptable to samples of different sizes and shapes, and lack effective in-situ characterization methods, so it is impossible to collect samples on the surface of samples during the experiment. Information such as strain field or fatigue crack growth

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