Multifunctional pressure difference type method for testing compatibility of high-pressure hydrogen and materials

A test method and technology of high-pressure hydrogen, applied in the direction of applying stable tension/pressure to test the strength of materials, using repetitive force/pulse force to test the strength of materials, etc., can solve the problems of difficult measurement, signal drift, hydrogen leakage, etc., Achieve the effect of improving reliability and safety, avoiding servo test mechanisms, and reducing the probability of leakage
CN104880368AActive Publication Date: 2015-09-02ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2015-09-02

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Abstract

The invention relates to the field of development of material mechanical property testing devices, and aims at providing a multifunctional pressure difference type method for testing the compatibility of high-pressure hydrogen and materials. The method includes a bursting test method, a variable-hydrogen-pressure fatigue test method and a constant-hydrogen-pressure fatigue test method. By means of the method for applying loads on a disc sample through the pressure difference of the upper surface and the lower surface of the disc sample, complex servo test mechanisms are avoided, the device size is greatly reduced, the device input is reduced, operation is easy and convenient, and the test efficiency is improved; in the test process, parameters such as strain and displacement of the disc sample can be conveniently measured, and corresponding tested elements are not influenced by high-pressure hydrogen.
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Description

technical field

[0001] The invention relates to the field of development of testing equipment for mechanical properties of materials, in particular to a testing method for compatibility between multifunctional differential pressure high-pressure hydrogen and materials. Background technique

[0002] Hydrogen is an important part of the clean utilization of fossil energy and the development of new energy. Hydrogen is usually stored and transported in gaseous form under high pressure. In recent years, due to the development trend of higher pressure of high-pressure hydrogen system and complex service environment, the compatibility problem of materials used in high-pressure hydrogen system and hydrogen (ie hydrogen embrittlement problem) has gradually become prominent. Hydrogen embrittlement will reduce the toughness of the material and increase the crack growth rate, which will cause a sudden and serious failure of the high-pressure hydrogen system during service, causing grea...

Claims

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