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System and method for testing mechanical properties of conductor material at high-temperature vacuum environment

A conductor material, high-temperature vacuum technology, applied in the direction of applying stable tension/pressure to test the strength of materials, analyzing materials, and conducting material analysis through optical means, which can solve inaccurate temperature measurement, difficulty in strain measurement, slow heating rate, etc. problem, to achieve the effect of accurate measurement, high test efficiency and good stability

Active Publication Date: 2017-05-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the above deficiencies, the present invention discloses a system for testing the mechanical properties of conductor materials in a high-temperature vacuum environment, which realizes the testing of mechanical properties such as high-temperature tensile, compressive strength, and modulus of materials in the temperature range of 600°C-3000°C. It solves the problems of slow heating rate, inaccurate temperature measurement, difficulty in strain measurement and oxidation of materials in the high-temperature mechanical performance test of current materials.

Method used

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  • System and method for testing mechanical properties of conductor material at high-temperature vacuum environment

Examples

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Effect test

Embodiment 1

[0049] Such as figure 1 , 4 As shown, a system for testing the mechanical properties of conductor materials in a high-temperature vacuum environment, including a high-temperature deformation test subsystem, a temperature control subsystem and a loading subsystem,

[0050] The high temperature deformation testing subsystem includes two CCD cameras 1, LED blue light sources 2 and a first computer 3, the two CCD cameras 1 are connected to the first computer 3 through data lines, and the LED blue light sources 2 are used for collecting image data Supplement monochromatic blue light in the process, and add narrow-band blue light filters in front of the lenses of the two CCD cameras 1 at the same time, and the first computer 3 records and saves the image data collected by the two CCD cameras 1;

[0051] The temperature control subsystem includes a double colorimetric pyrometer 4, an electrode 5, a temperature control box 6 and a second computer 7. The double colorimetric pyrometer ...

Embodiment 2

[0054] The test method for testing the mechanical properties of conductor materials under a high-temperature vacuum environment obtained by the system of Example 1 is as follows:

[0055] (1) Make high-temperature speckles on the surface of the material by spraying with a brush, first dry at room temperature, and then dry in a drying oven at 92°C for 2 hours; check the appearance of the sample, number and record the surface state of the sample, and use Measure the width and thickness of any three places in the gauge length area of ​​the sample with a caliper, take the average value, and record the data as shown in Table 1; install the sample to ensure that the sample axis coincides with the tensile axis of the testing machine;

[0056] Table 1

[0057]

[0058] (2) Adjust the upper, middle and lower sections of the double colorimetric pyrometer so that the indicating lasers are respectively hit on the upper, middle and lower sections of the sample, and ensure that the faste...

Embodiment 3

[0084] The test method adopted in this implementation is the same as that in Example 2, the difference is that the sample is compressed by a mechanical testing machine, and the results obtained are as follows Figure 6 and Figure 7 As shown, the test data results are shown in Table 2:

[0085] Table 2

[0086]

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Abstract

The invention provides a system and method for testing mechanical properties of a conductor material at a high-temperature vacuum environment. According to the system and the method, the problems that the high-temperature strain is difficult to test, the sample heating efficiency is low, and the like are solved. The system comprises a high-temperature strain test subsystem, a temperature control subsystem and a loading subsystem; and a stretch process is carried out in a vacuum environmental chamber, and a sample is loaded by virtue of a mechanical test machine. According to the method, a Joule effect is adopted, a material is put into the vacuum environmental chamber, the normal temperature absolute vacuum degree can reach 0.025Pa, low voltage and high current are introduced to the conductor material so as to rapidly heat the sample, the loading is carried out after reaching a target temperature, meanwhile, data collection is carried out on a high-temperature deformation field by virtue of a DIC strain test technique so as to obtain a strain field of a whole sample scale distance section and a displacement-load curve of the sample, and subsequent processing is carried out so as to obtain high-temperature tensile / compression modulus and tensile strength of the sample. The system and the method have the advantages of high heating speed, uniform temperature field, high deformation measurement precision and the like.

Description

technical field [0001] The invention belongs to the technical field of testing high-temperature mechanical properties of materials, and specifically relates to a system and a testing method for testing the mechanical properties of conductor materials in a high-temperature vacuum environment. [0002] technical background [0003] With the development of aerospace technology, hypersonic vehicles have received great attention from many countries. When a hypersonic vehicle flies in the dense atmosphere, it will have severe friction with the air, and most of the kinetic energy of the vehicle will be converted into heat energy, causing the temperature of the tip to rise sharply. According to the preliminary aerodynamic thermal environment estimation, the reentry aerodynamic heating at the end is at 2500°C (sliding 12,000km), and the large area reentry aerodynamic heating temperature is between 400-1100°C. In order to ensure the safety of the aircraft, the material of its thermal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18G01N21/84
CPCG01N3/18G01N21/84G01N2203/0003G01N2203/0016G01N2203/0085G01N2203/0226G01N2203/0676G01N2203/0682
Inventor 韩新星许承海孟松鹤解维华金华易法军
Owner HARBIN INST OF TECH
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