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A corrosion fatigue crack growth test device

A crack growth test and corrosion fatigue technology, which is applied in the direction of measuring devices, weather resistance/light resistance/corrosion resistance, wear resistance testing, etc., can solve problems such as solution leakage, and achieve the effect of easy operation, volume reduction, and vertical loading

Active Publication Date: 2018-07-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the problems existing in the prior art, the main purpose of the present invention is to provide a corrosion fatigue crack growth test device, which solves the special requirements of the fatigue testing machine in the prior art, the need to modify the flexibility coefficient and the easy solution of the clamping extension timing. In case of leakage, the device can accurately measure the corrosion fatigue crack length and control the heating temperature of the solution

Method used

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  • A corrosion fatigue crack growth test device
  • A corrosion fatigue crack growth test device
  • A corrosion fatigue crack growth test device

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Embodiment

[0033] like Figure 1 to Figure 4 As shown, the corrosion fatigue crack growth test device of this embodiment includes a load application system, a crack detection system and a temperature control system. The specific structure and use process are as follows:

[0034] The load application system is equipped with an upper U-shaped fixture 7 and a lower U-shaped fixture 10 with a raised platform for loading the CT sample 14; the lower U-shaped fixture 10 has a raised platform 21 for carrying the environmental box 4 (plexiglass) , the boss 21 is loaded from the lower U-shaped clamp installation port 13 on the bottom surface of the environmental box 4 .

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Abstract

The invention relates to the field of corrosion fatigue crack measurement, in particular to a corrosion fatigue crack growth test device, which is suitable for measuring the corrosion fatigue crack growth rate and threshold value of materials by the flexibility method, and solves the problem of the fatigue test when the sample is clamped in the prior art. The loading direction of the machine has special requirements, or the parameters of the flexibility formula need to be modified during the clamping extension timing, and the solution is easy to leak. The device includes a load application system, a crack detection system and a temperature control system. The device of the present invention is easy to operate, install and use, and the conventional vertical fatigue testing machine can be used to load the CT sample in the solution, which effectively avoids the leakage of the solution, does not need to modify the flexibility formula, and is suitable for the calculation of the flexibility method at room temperature or high temperature solution Testing of corrosion fatigue crack growth rate and threshold value of materials. Its temperature control is accurate, and it can measure the corrosion fatigue crack growth rate and threshold value of materials under normal temperature solution and high temperature solution, and it is easy to observe the corrosion state of the sample in real time.

Description

technical field [0001] The invention relates to the field of corrosion fatigue crack measurement, in particular to a corrosion fatigue crack growth test device, which is suitable for measuring the corrosion fatigue crack growth rate and threshold value of materials by a flexibility method. Background technique [0002] The measurement of fatigue cracks has always been one of the concerns of fatigue fracture researchers. Usually, visual inspection, potential drop method and flexibility method are used to measure fatigue cracks. Among them, the visual method requires the test personnel to observe and record the length of the crack in real time, and the workload is relatively large. In a corrosive environment, visual observation of the crack length is prone to large errors. For fatigue tests in corrosive media, the drop-of-potential method needs to consider the insulation between the sample and the clamping system and the insulation between the wire and the sample welding point...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/56G01N17/00
Inventor 周宇张波赵东杨王俭秋柯伟韩恩厚
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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