A device for testing mechanical properties in ultra-high temperature environments

Abstract

The utility model relates to the technical field of mechanical property testing of metal materials, specifically to a mechanical property testing device in an ultra-high temperature environment, including a sealed test chamber, and also including: two laser heating systems that penetrate the sealed test chamber and are symmetrically arranged, the emission ends of the laser heating systems extend into the sealed test chamber, and the laser beams emitted by the two laser heating systems are staggered in the sealed test chamber to form a heating position; a clamping unit, which is arranged in the sealed test chamber, and the sample clamped by the clamping unit is at the heating position; a testing unit. The laser beams emitted by the two laser heating systems are transmitted to the sealed test chamber through optical fibers, so that the double-sided heating of the sample is achieved simultaneously, and the sample can be quickly heated to an ultra-high temperature, thereby improving the test efficiency. The design of heating on both sides simultaneously ensures the temperature uniformity of the sample during the heating process, thereby improving the accuracy of the test; at the same time, a suitable test mode can be selected according to the needs to evaluate the mechanical properties of the sample.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material mechanical property testing, in particular to an ultra-high temperature environment mechanical property testing device. Background Art

[0002] Due to the continuous development of high-tech enterprises and national defense equipment, the study of the mechanical properties of materials in extreme environments has become particularly important. Therefore, it is necessary to understand the various mechanical performance indicators of materials in ultra-high temperature environments to provide strong evidence for material selection under different working conditions.

[0003] Develop a testing system for the mechanical properties of materials in ultra-high temperature environments to provide a theoretical basis and guidance for the optimal design of materials and structures in the aerospace and military industries, as well as the reliability of material process selection.

[0004] However, traditional mechanical properties testing devices mostly use induction coil heating or radiation heating by heating elements such as resistance wires. The test effect is limited in high temperature environments and it is difficult to achieve ultra-high temperature conditions. In addition, the temperature control of induction coil heating is not accurate and uniform, and the heating rate is slow. Summary of the invention

[0005] The purpose of the utility model is to provide a mechanical property testing device in an ultra-high temperature environment to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An ultra-high temperature environment mechanical properties testing device, comprising a sealed test chamber, and further comprising:

[0008] Two laser heating systems are symmetrically arranged and run through the sealed test cavity, wherein the emission ends of the laser heating systems extend into the sealed test cavity, and the laser beams emitted by the two laser heating systems are staggered in the sealed test cavity to form a heating position;

[0009] A clamping unit is disposed in the sealed test chamber, and the sample clamped by the clamping unit is at a heating position;

[0010] The test unit includes a device that penetrates the sealed test cavity and is connected to an auxiliary device.

[0011] As described above, in the ultra-high temperature environment mechanical properties testing device: a laser light leakage collection system is also arranged in the sealed test chamber, and the laser light leakage collection system is formed with two absorption surfaces, and the two absorption surfaces are respectively facing the laser beams emitted by the two laser heating systems.

[0012] The ultra-high temperature environment mechanical properties testing device as described above: the laser heating system is also provided with a coaxial temperature detection and control system for adjusting the temperature of the laser beam.

[0013] The ultra-high temperature environment mechanical properties testing device as described above: the sealed test chamber includes a sealed test chamber body with two ends connected and sealed doors arranged at both ends of the sealed test chamber body and sealed and fixed by multiple sets of locking bolts.

[0014] The ultra-high temperature environment mechanical properties testing device as described above: the sealed door is provided with an observation window.

[0015] The ultra-high temperature environment mechanical properties testing device as described above: the laser heating system is also integrated with a temperature detector, and the temperature detector establishes communication with the laser heating system.

[0016] The ultra-high temperature environment mechanical properties testing device as described above: the inner sides of the sealing test cavity and the sealing door are both formed with cavities;

[0017] The cavity is filled with an inert protective gas;

[0018] Alternatively, the cavity is in a vacuum state.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The laser beams emitted by the two laser heating systems are transmitted to the sealed test chamber through optical fibers, achieving simultaneous heating of both sides of the sample. The sample can be quickly heated to an ultra-high temperature, which improves the test efficiency. The design of simultaneous heating on both sides ensures the temperature uniformity of the sample during the heating process and improves the accuracy of the test. At the same time, the appropriate test mode can be selected as needed to evaluate the mechanical properties of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the ultra-high temperature environment mechanical properties testing device.

[0022] Figure 2 It is a side view of the ultra-high temperature environment mechanical properties testing device.

[0023] Figure 3 for Figure 2 Cross-section view along the AA direction.

[0024] In the figure: 1-sealed test chamber, 2-sealed door, 3-observation window, 4-locking bolt, 5-laser heating system, 6-coaxial temperature detection and control system, 7-test head, 8-auxiliary operation hole, 9-laser light leakage collection system, 10-sample. DETAILED DESCRIPTION

[0025] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0026] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0027] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0028] See also Figure 1-Figure 3 In an embodiment of the utility model, a mechanical property testing device in an ultra-high temperature environment includes a sealed test cavity, and also includes: two laser heating systems 5 that penetrate the sealed test cavity and are symmetrically arranged, the emitting ends of the laser heating systems 5 extend into the sealed test cavity, and the laser beams emitted by the two laser heating systems 5 are staggered in the sealed test cavity to form a heating position; a clamping unit is arranged in the sealed test cavity, and the sample 10 clamped by the clamping unit is at the heating position; a testing unit includes a device that penetrates the sealed test cavity and is connected to an auxiliary device.

[0029] Wherein, the clamping unit includes two clamping heads and a driving member for driving the clamping heads to move toward or in the opposite direction, and the driving member includes but is not limited to an electric telescopic rod. The clamping heads are provided with a water cooling structure to prevent damage to the clamping heads caused by high temperature.

[0030] The auxiliary equipment includes a test device for mechanical property testing, including but not limited to tensile, compression, bending and other tests. The appropriate test mode can be selected according to needs to evaluate the mechanical properties of the sample. The test data is recorded and stored in real time through a data acquisition system for subsequent analysis.

[0031] Among them, it should be supplemented that the mechanical properties testing device and the clamping unit are connected by flange connection. The mechanical properties testing device is equipped with a high-precision mechanical sensor. The force output by the motor drives the sample clamping device to rise or fall, thereby applying different forms of force such as tension, compression, and bending to the sample. During the loading process, the force sensor measures the force applied to the sample in real time.

[0032] In this embodiment, the laser beams emitted by the two laser heating systems 5 are transmitted to the sealed test chamber through optical fibers, thereby achieving simultaneous heating of both sides of the sample 10. The sample 10 can be quickly heated to an ultra-high temperature, thereby improving the test efficiency. The design of simultaneous heating on both sides ensures the temperature uniformity of the sample during the heating process, thereby improving the accuracy of the test.

[0033] Furthermore, a laser light leakage collection system 9 is also provided in the sealed test cavity. The laser light leakage collection system 9 is formed with two absorption surfaces. A cavity is formed in the laser light leakage collection system 9. Cooling water is flowed in the cavity. The two absorption surfaces are respectively directed toward the laser beams emitted by the two laser heating systems 5, so as to absorb and conduct the preheating generated by the laser beam leakage. The absorption surface is made of black carbon-based material. The surface of the absorption surface is rough to prevent secondary reflection of the laser and can quickly absorb the leaked laser. The absorbed laser will generate heat, which is promptly taken away by circulating water cooling.

[0034] The laser heating system 5 is also provided with a coaxial temperature detection and control system 6 for adjusting the temperature of the laser beam. The laser heating system 5 adopts a high-power laser, such as a CO2 laser or a fiber laser, whose wavelength and power density can be adjusted according to the material properties of the sample to ensure that the laser energy is efficiently absorbed by the sample 10. The laser beam is transmitted to both sides of the test cavity through the optical fiber and is focused on the sample 10 through a focusing mirror to achieve double-sided heating at the same time. The heating spot size is 5-300mm in length and 5-100mm in width.

[0035] The coaxial temperature detection and control system 6 achieves precise control of the temperature of the sample 10 by controlling the laser heating system 5 , thereby meeting different testing requirements.

[0036] Furthermore, the sealing test chamber includes a sealing test chamber 1 with two ends connected and a sealing door 2 arranged at both ends of the sealing test chamber and sealed and fixed by multiple sets of locking bolts 4, an observation window 3 is provided on the sealing door 2, and an inflation port is provided on the sealing door 2 for filling inert gas into the sealing test chamber 1 or evacuating the chamber.

[0037] The sealing test cavity 1 is provided with an auxiliary operation hole 8 for installing other auxiliary components, such as an extensometer for testing the tensile or compressive deformation of materials in a high temperature environment; a thermal imager for infrared thermal imaging, etc.

[0038] The laser heating system 5 is also integrated with a temperature detector, which establishes communication with the laser heating system 5. The temperature detector is a temperature sensor that can realize coaxial temperature measurement and signal transmission, and adjust the power and heating time of the laser according to the preset temperature curve to ensure that the sample can be quickly and evenly heated to the set temperature.

[0039] A cavity is formed inside the sealing test cavity 1 and the sealing door 2 , and the cavity is filled with an inert protective gas, or the cavity is in a vacuum state, so as to effectively protect the sealing test cavity 1 and the sealing door 2 .

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An ultra-high temperature environment mechanical properties testing device, comprising a sealed test chamber, characterized in that: Also includes: Two laser heating systems (5) are symmetrically arranged and extend through the sealed test cavity, wherein the emission ends of the laser heating systems (5) extend into the sealed test cavity, and the laser beams emitted by the two laser heating systems (5) are staggered in the sealed test cavity to form a heating position; A clamping unit is disposed in the sealed test chamber, and the sample (10) clamped by the clamping unit is at a heating position; The test unit includes a device that penetrates the sealed test cavity and is connected to an auxiliary device.

2. The ultra-high temperature environment mechanical properties testing device according to claim 1, characterized in that: A laser light leakage collection system (9) is also provided in the sealed test chamber. The laser light leakage collection system (9) is formed with two absorption surfaces, and the two absorption surfaces are respectively directed toward the laser beams emitted by the two laser heating systems (5).

3. The ultra-high temperature environment mechanical properties testing device according to claim 2, characterized in that: The laser heating system (5) is also provided with a coaxial temperature detection and control system (6) for adjusting the temperature of the laser beam.

4. The ultra-high temperature environment mechanical properties testing device according to claim 3, characterized in that: The sealing test chamber comprises a sealing test chamber body (1) with two ends connected, and sealing doors (2) arranged at two ends of the sealing test chamber body and sealed and fixed by a plurality of sets of locking bolts (4).

5. The ultra-high temperature environment mechanical properties testing device according to claim 4, characterized in that: The sealed door (2) is provided with an observation window (3).

6. The ultra-high temperature environment mechanical properties testing device according to claim 5, characterized in that: The laser heating system (5) is also integrated with a temperature detector, and the temperature detector establishes communication with the laser heating system (5).

7. The ultra-high temperature environment mechanical properties testing device according to claim 6, characterized in that: The inner sides of the sealing test cavity (1) and the sealing door (2) are both formed with cavities; The cavity is filled with an inert protective gas; Alternatively, the cavity is in a vacuum state.

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