A test device for testing the tensile properties of materials under high temperature and high pressure gas

Abstract

The invention discloses a test device for testing a tensile property of a material in high-temperature high-pressure gas. The test device comprises a sample chamber, an upper pressing nut and a lower pressing nut, wherein a hollow cavity is formed in the sample chamber; two ends of the cavity are sealed by pressing sealing rings through the upper pressing nut and the lower pressing nut; an air inlet connected with the cavity is formed in one side of the sample chamber, and an air outlet connected with the cavity is formed in the other side of the sample chamber. The acting effect on a material of the device is completely different from that of a tensile test which is performed on a material stored at normal temperature and under high pressure under atmosphere or that of a normal-pressure high-temperature tensile test only on a material. The device can be used for performing a mechanical property test on a material in a comprehensive high-temperature and high-pressure corrosive gas environment, has the actual significance on demonstration of safety and reliability of a material during application and is designed for the first time.

Description

technical field [0001] The invention relates to a tensile performance test, in particular to a test device for in-situ testing of the tensile properties of materials in a high-temperature and high-pressure gas environment. The gas environment is high-pressure gas, and is suitable for materials whose yield strength is greater than the test pressure. Background technique [0002] In military, aerospace, nuclear energy and other fields, high-temperature and high-pressure containers have been widely used. When container materials are used in corrosive high-pressure gas environments such as hydrogen and water vapor, the use environment will accelerate the corrosion and damage of container materials. , resulting in the risk of accidents. [0003] At present, there is no test device for in-situ testing of the mechanical properties of materials in high-temperature, high-pressure gas environments. In order to meet a wide range of social needs, a test device for in-situ testing of mat...

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Problems solved by technology

[0002] In military, aerospace, nuclear energy and other fields, high-temperature and high-pressure containers have been widely used. When container materials are used in corrosive high-pressure gas environments such as hydrogen and water vapor, the use environment will accelerate the corrosion and damage of container materials. , resulting in the risk of accidents

[0003] At present, there is no test device for in-situ testing of the mechanical properties of materials in high-temperature, high-pressure gas environments. In order to meet a wide range of social needs, a test device for in-situ testing of material tensile properties in high-temperature, high-pressure gas environments has been designed. On the testing machine, the maximum pressure of the test gas environment can reach 50MPa. This device can be used to test the strength and plasticity of materials under different gas pressure and temperature environments.

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