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Loading device and loading mode for use in measurement of hydrogen diffusion in stress field

A loading device and stress field technology, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as test structure interference, decision-making affecting hydrogen diffusion, test structure data dispersion, etc., to achieve the effect of reducing deviation and effective evaluation

Inactive Publication Date: 2010-05-12
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, due to the unavoidable internal stress in the sample, it will cause great interference to the test structure, making the data of the test structure scattered, affecting people's decision-making on the hydrogen diffusion problem in a specific metal structure, and has great impact on the theoretical research and structural research involving hydrogen damage. Engineering evaluations are adversely affected

Method used

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  • Loading device and loading mode for use in measurement of hydrogen diffusion in stress field
  • Loading device and loading mode for use in measurement of hydrogen diffusion in stress field
  • Loading device and loading mode for use in measurement of hydrogen diffusion in stress field

Examples

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Embodiment Construction

[0048] A loading device for hydrogen diffusion measurement in stress field, such as figure 1 Shown, including:

[0049] Positioning frame 1, a rigid support arranged between the hydrogen permeation double electrolytic cell 100 and 200, on which a chute is arranged along the long axis of the sample to be tested;

[0050] The two sets of loading frames 21 and 22 are supported by the positioning frame 1, arranged in parallel along the long axis of the sample 3 to be tested, and can slide along the chute in the positioning frame 1. Each set of loading frames includes two main frames, which are separate On both sides of the test sample 3 along the short axis direction, sandwich the test sample 3 and perpendicular to the upper and lower surfaces of the test sample 3, such as figure 2 Shown

[0051] The loading windows 41, 42, 41', 42' are opened on each group of loading frames 21, 22. The upper and lower surfaces of the sample 3 to be tested are the vertical planes, and they are divided i...

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Abstract

The invention relates to a loading device and a loading mode for use in the measurement of hydrogen diffusion in a stress field. In the loading device and the loading mode, a loading frame and a loading strip apply a load 1 and / or an axially loading platform applies a load 2 and a hydrogen permeation double electrolytic cell is adopted at the same time so as to realize the random change of a dynamic field in the direction of hydrogen permeation in a thin film within a certain range, namely the change of the size, direction and gradient of the stress field to change conditions for hydrogen diffusion and simulate the conditions of hydrogen diffusion in an actual material. The loading device and the loading mode are widely used in the measurement of the metal hydrogen flux and hydrogen diffusion coefficient of a specified stress field, so an advanced technical means is provided for testing the hydrogen corrosion, hydrogen permeation and hydrogen brittleness sensibility of steel and titanium alloy and other materials used in petroleum and natural gas drilling and transmission equipment, hydrogenation reactors, oil and gas transmission equipment, marine fixed structures, submerged pipelines and the like.

Description

Technical field [0001] The invention relates to a device for generating a given stress field in a film-like metal sample. It adopts a pair of rigid frames and attachments, and cooperates with a hydrogen permeation double electrolytic cell, which can change the hydrogen permeation direction in the film within a certain range. The mechanical field, that is, the magnitude, direction and gradient of the stress field, can change the hydrogen diffusion conditions, simulate the hydrogen diffusion conditions in actual materials, and provide advanced research methods for hydrogen diffusion theory research and material hydrogen embrittlement / hydrogen corrosion damage mechanism. Background technique [0002] The study of hydrogen diffusion kinetics in metal materials generally adopts the "dual electrolytic cell method", that is, there is an electrolytic cell on each side of the film sample to be tested: one is a hydrogen-charged electrolytic cell, and the other is an oxidized electrolytic ce...

Claims

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Application Information

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IPC IPC(8): G01N17/02
Inventor 权高峰
Owner DALIAN JIAOTONG UNIVERSITY
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