CN110441163B - High temperature ultrasonic fatigue in-situ testing instrument and testing method - Google Patents

Abstract

The invention relates to a high-temperature ultrasonic fatigue in-situ testing instrument and a testing method, and belongs to the field of precision scientific instruments. The instrument consists of an overall frame module, a mechanical loading module, a high-temperature loading module and an in-situ monitoring module. The overall frame module is used for precise positioning of each functional module, while providing stable support and effective vibration isolation; the mechanical loading module is used for the test sample. Static tensile/compression loads are applied simultaneously at both ends, ultrasonic fatigue loads are applied according to the test requirements, and accurate axial indexing can be achieved; the high temperature loading module is used to apply high temperature loads to the tested sample; the in-situ monitoring module is used to apply high temperature loads to the tested sample. The surface deformation damage and internal damage defects of the test samples were monitored in situ in parallel. It can realize the synchronous characterization and three-dimensional reconstruction of the defect information of the tested sample from the inside to the outside and from the outside to the inside. It has the characteristics of complex load environment, high test accuracy, and dynamic monitoring of material mechanical behavior and deformation damage mechanism.

Description

High temperature ultrasonic fatigue in-situ testing instrument and testing method

technical field

The invention relates to the field of precision scientific instruments, in particular to a high-temperature ultrasonic fatigue in-situ testing instrument and a testing method. The high-temperature loading of the tested material sample can be realized in a vacuum or inert gas atmosphere, and at the same time, the synchronous characterization and three-dimensional reconstruction of the defect information of the tested sample from the inside to the outside and from the outside to the inside can be realized. It provides a reliable method for studying the fatigue performance and deformation damage mechanism of materials in the fields of aerospace and equipment manufacturing under high temperature and ultrasonic loads.

Background technique

Combining in-situ monitoring methods, carrying out mechanical-thermal coupled fatigue testing is an important method to obtain the service performance of materials at high temperature and to explore the evolution law of fatigue performance. In the fields of aerospace and equipment manufacturing, some key structural materials, such as aero-engine turbine blades, automobile engine pistons, etc., often serve under high temperature and high frequency conditions, and fatigue failures often occur, causing serious economic losses to the country. How to achieve high-precision loading of high-temperature temperature field and high-frequency mechanical load, simulate materials close to actual service conditions, and combine in-situ monitoring devices to carry out in-situ monitoring of materials close to actual service conditions, is to evaluate the high-temperature fatigue performance and service conditions of materials. The key to safety.

Universal testing machines, ultrasonic fatigue testing machines, low-frequency fatigue testing machines, and fatigue testing machines with integrated muffle furnaces are relatively common material testing machines on the market. These testing machines are simple in structure and single in function, making it difficult to build a vacuum or inert gas atmosphere. , it is impossible to achieve high-precision loading of the high-temperature temperature field and high-frequency mechanical load of the tested sample, and due to the lack of an in-situ monitoring device, it is difficult to carry out in-situ monitoring of the tested sample during the test. Restricted by the existing material testing equipment and the existing testing methods are relatively simple, it is difficult to realize the research on the fatigue performance and deformation damage mechanism of materials in key fields such as aviation, aerospace and automobiles under the action of high temperature and ultrasonic fatigue.

With the wide application of optical microscopy imaging technology, infrared thermal imaging technology, X-ray crystal diffraction technology, etc. in the field of material micromechanical property testing, the in situ mechanical testing technology based on parallel monitoring of multiple in situ monitoring methods is used in key areas of high temperature materials. The role of fatigue performance and deformation damage mechanism research has become more and more prominent. For example, by using CT scanning imaging technology and optical microscopic imaging technology for simultaneous characterization, the internal three-dimensional topography and surface micro-region topography of the test sample can be intuitively obtained; by using CT scanning imaging technology and infrared thermal imaging technology for simultaneous characterization, the test sample can be visually obtained. The three-dimensional morphology of the internal damage of the test sample and the global temperature distribution information of the sample gauge section.

To sum up, in order to meet the major testing requirements of key structural materials in the fields of national aerospace and equipment manufacturing, combined with the existing in-situ monitoring technology, a high-temperature ultrasonic fatigue in-situ testing instrument is developed, and a high-temperature ultrasonic fatigue test instrument is provided. A bit test method is necessary.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a high-temperature ultrasonic fatigue in-situ testing instrument and a testing method to make up for the deficiencies of the existing testing methods and testing techniques. The instrument of the invention adopts hydraulic servo drive technology, electric servo drive technology, piezoelectric ultrasonic drive technology, combined with resistance wire radiation heating technology, can construct vacuum or inert gas atmosphere, and realize ultrasonic fatigue test of the tested sample under high temperature environment. At the same time, the high-depth-of-field microscopic imaging device, infrared thermal imaging device, and CT scanning device can be used to realize the simultaneous characterization and three-dimensional reconstruction of the defect information of the tested sample from the inside to the outside, from the outside to the inside; based on high-temperature ultrasonic fatigue in situ The test instrument provides a high-temperature ultrasonic fatigue in-situ test method for the major testing needs of key structural materials in the fields of national aerospace and equipment manufacturing. reliable means.

The above-mentioned purpose of the present invention is achieved through the following technical solutions:

High-temperature ultrasonic fatigue in-situ testing instrument, including overall frame module 1, mechanical loading module 2, in-situ monitoring module 3, high-temperature loading module 4, overall frame module 1 adopts a four-column structure, and realizes monitoring of mechanical loading module 2 and in-situ monitoring. The module 3, the firm support of the high temperature loading module 4, the mechanical loading module 2 are respectively through the support shell of the commercialized motor drive assembly 40, the connecting flange of the upper hydraulic cylinder 43 and the upper support plate 9 and the installation platform 5 in the overall frame module 1 Rigid connection to realize the simultaneous application of static tension/compression load to both ends of the tested sample, the in-situ monitoring module 3 is installed in the overall frame module 1 through the fixed bottom plate 67, the fixed seat 60, the guide seat 61 and the mounting bracket 58 respectively. Platform 5, CT fixing plate II14, column connecting block 8, CT fixing plate I7 are rigidly connected to realize the synchronous characterization and three-dimensional reconstruction of the defect information of the tested sample from the inside to the outside, from the outside to the inside; the high temperature loading module 4 passes the The "L"-shaped support 75 is rigidly connected to the installation platform 5 of the overall frame module 1, and is connected to the upper and lower ultrasonic probes 33 and 35 of the mechanical loading module 2 through the upper and lower dynamic sealing bellows 71 and 77. Vacuum or inert gas atmosphere to isolate oxygen to achieve high temperature loading of the test sample.

The mechanical loading module 2 includes a hydraulic loading sub-module 15, an ultrasonic loading sub-module 16 and a sample transposition sub-module 17. The ultrasonic loading sub-module 16 realizes the ultrasonic fatigue loading of the tested sample, and the hydraulic loading sub-module 15 passes the upper , The lower piston rods 46 and 47 are rigidly connected with the expansion sleeve II41 of the sample transposition sub-module 17 and the expansion sleeve I38 of the ultrasonic loading sub-module 16; The intermediate connecting rod 27 is rigidly connected, and in one test experiment, the double-end synchronous static tensile load loading, ultrasonic fatigue load loading and axial accurate indexing can be realized at the same time.

The dimensions of the upper and lower high-temperature connecting rods 23 and 22 in the ultrasonic loading sub-module 16 are matched to the ultrasonic system, and the longitudinal vibration is reached at 20 kHz; the upper and lower high-temperature connecting rods 23 and 22 have symmetrically distributed "H" The cooling flow channel is of type type, and the inlet/outlet of the cooling flow channel is set at its vibration displacement node, so as to reduce the interference of the cooling water pipe to the vibration of the upper and lower high-temperature connecting rods 23 and 22 .

The in-situ monitoring module 3 includes a three-dimensional infrared thermal imaging sub-module 51, a high-depth-of-field microscopic imaging sub-module 52, and a CT scanning imaging sub-module 53. The three-dimensional infrared thermal imaging sub-module 51 includes two infrared thermal imaging devices 69. All are placed on the "H" type mounting plate 62 to realize the three-dimensional reconstruction of the global temperature information in the gauge length section of the tested sample; the high-depth-of-field microscopic imaging sub-module 52 is: the high-depth-of-field microscopic imaging device 65 is fixed on the microscope On the mounting plate 64, the microscope mounting plate 64 is fixed on the microscope three-degree-of-freedom positioning platform 66. Driven by the microscope three-degree-of-freedom positioning platform 66, the high-depth-of-field microscopic imaging device 65 is relative to the axial and radial positions of the sample to be tested. Fast and precise adjustment is performed to realize the follow-up monitoring of the surface morphology and defects of the central micro-area of the gauge length of the tested sample; the CT scanning imaging sub-module 53 is: the CT host 55 is fixed on the support plate 59, and the support plate 59 is fixed On the CT three-DOF positioning platform 54, the CT three-DOF positioning platform 54 is fixed on the fixing base 60, the high-resolution receiving plate 56 is fixed on the receiving plate Z-direction positioning platform 57, and the receiving plate Z-direction positioning platform 57 is fixed on On the mounting frame 58, driven by the CT three-degree-of-freedom positioning platform 54, the CT host 55 can be quickly and accurately adjusted relative to the axial and radial positions of the sample to be tested; driven by the receiving plate Z-direction positioning platform 57, the high The resolution receiving plate 56 is quickly and accurately adjusted relative to the axial direction of the sample to be tested. The CT host 55 is used in conjunction with the high-resolution receiving plate 56 to achieve layer-by-layer scanning and imaging of the gauge length segment of the sample to be tested.

The "H" type mounting plate 62 is connected with the slider assembly I68, the slider assembly I68 is matched with the guide rail assembly I63, the guide rail assembly I63 is rigidly connected with the guide rail seat 61, and the "H" type mounting plate 62 is machined with threaded holes. Blind holes are processed at the corresponding positions of the guide rail seat 61 , and the “H”-shaped mounting plate 62 moves up and down along the guide rail assembly 163 , and is fixed to the guide rail seat 61 by bolts.

In the above-mentioned high temperature loading module 4, the gas spring assembly 82 is rigidly connected with the flange of the upper dynamic sealing bellows 71 to limit the axial rotational freedom of the bellows and prevent the bellows from being damaged by torsion.

In the high temperature loading module 4, the rotary seal assemblies I, II 87, and 91 include a seal ring I 94, a seal ring assembly 95, a seal ring II 96, a seal shaft sleeve 97, and a seal flange 98. The seal ring assembly 95 is embedded in the upper ultrasonic probe 33. In the sealing groove of the shaft shoulder, the sealing ring I94 is embedded in the sealing groove of the sealing flange 98, and the sealing ring II96 is embedded in the sealing groove on the flange of the upper dynamic sealing bellows 71. The ultrasonic probes 33 and 35 cooperate to realize rotary sealing.

In the high temperature loading module 4, the built-in quartz observation window assembly 89 is an independent module, which is fixed on the outer wall of the vacuum chamber 72 by bolts; There is a gap between the layers of quartz glass, and circulating cooling water is introduced to achieve cooling. The bottom of the outer layer of quartz glass is close to the furnace wall of the heating furnace 78, and the inner diameter of the inner layer of quartz glass is larger than the outer diameter of the lens of the high depth of field microscope imaging device 65. During the test The lens of the high-depth-of-field microscopic imaging device 65 is inserted into the built-in quartz observation window assembly 89 to meet its microscopic imaging distance requirements.

In the above-mentioned high temperature loading module 4, the cavity support seat 74 is welded on the side wall of the vacuum chamber 72 and is rigidly connected with the slider assembly II86 through bolts, the slider assembly II86 cooperates with the guide rail assembly II79, and the guide rail assembly II79 is connected to the guide rail assembly II79 through bolts. The "L"-shaped support 75 is rigidly connected, and the "L"-shaped support 75 is rigidly connected to the installation platform 5. When the normal temperature test is performed, the vacuum chamber 72 moves along the guide rail, providing sufficient operating space for the test personnel.

Another object of the present invention is to provide a high-temperature ultrasonic fatigue in-situ testing method, the specific steps are as follows:

Step 1. Clamping of the ultrasonic sample 34: Move the "H" type mounting plate 62 to the upper limit position along the guide rail assembly I63, and fix it with bolts; open the vacuum chamber door 83, and connect the ultrasonic sample 34 through the double-ended stud to the upper limit position. The upper and lower high temperature connecting rods 23 and 22 are rigidly connected;

Step 2. High temperature loading of the ultrasonic sample 34: a vacuum environment is constructed in the vacuum chamber 72, or an inert gas is continuously introduced into the vacuum chamber 72 to construct an inert gas atmosphere; Infrared thermometers I, II 92, 93 monitor the temperature of the ultrasonic sample 34 gauge section in real time, and feed it back to the temperature controller , forming a closed-loop control;

Step 3. Static tensile/compressive load loading of the ultrasonic sample 34: The static tensile/compressive load loading of the ultrasonic sample 34 is realized by the mechanical loading module 2, and the upper and lower high-pressure oil drives the piston rods 46 and 47 to move toward each other, The power is transmitted to the ultrasonic loading sub-module 16 to drive the upper and lower high-temperature connecting rods 23 and 22 to move toward each other, so as to realize the static tensile/compressive load loading of the ultrasonic sample 34;

Step 4. Ultrasonic fatigue load loading of the ultrasonic sample 34: The ultrasonic fatigue load loading of the ultrasonic sample 34 is realized by the ultrasonic loading sub-module 16, and the weak mechanical vibration output by the ultrasonic transducer 26 passes through the upper ultrasonic connector 25 and the upper ultrasonic wave. After the two poles of the probe 33 are amplified, they are sequentially transmitted to the upper high-temperature connecting rod 23, the ultrasonic sample 34, the lower high-temperature connecting rod 22, the lower ultrasonic probe 35, and the lower ultrasonic connector 21, and these parts are excited to form a stable resonance at 20 kHz, The ultrasonic fatigue load loading of the ultrasonic sample 34 is realized;

Step 5. Axial indexing of the ultrasonic sample 34: The axial indexing of the ultrasonic sample 34 is realized by the sample indexing sub-module 17, and the power output by the servo motor in the commercial motor drive assembly 40 is transmitted to the speed reducer. The spline shaft 39 drives the ultrasonic loading sub-module 16 to rotate to realize the axial indexing of the ultrasonic sample 34;

Step 6. Parallel in-situ monitoring of the ultrasonic sample 34: The parallel in-situ monitoring of the ultrasonic sample 34 is realized by the in-situ monitoring module 3. In the three-dimensional infrared thermal imaging sub-module 51, two infrared thermal imaging devices 69 are placed On the "H"-shaped mounting plate 62, the three-dimensional reconstruction of the temperature information of the gauge length section of the test sample is realized; in the high-depth-of-field microscopic imaging sub-module 52, the microscope three-degree-of-freedom positioning platform 66 drives the high-depth-of-field microscopic imaging The device 65 can quickly and accurately adjust the axial and radial positions of the sample to be tested, so as to realize the follow-up monitoring of the surface morphology and defects of the micro-area in the center of the gauge distance of the sample to be tested; in the CT scanning imaging sub-module 53, the CT three The drive CT host 55 of the degree of freedom positioning platform 54 scans and images the gauge length section of the tested sample layer by layer, so as to realize three-dimensional reconstruction of the global defect information of the gauge length section of the tested sample; 3D infrared thermal imaging sub-module 51, high depth of field display The micro-imaging sub-module 52 and the CT scanning imaging sub-module 53 can be used simultaneously, or used in combination, or used individually, to realize dynamic in-situ monitoring of the ultrasonic sample 34 during the test.

The beneficial effects of the present invention are:

1. Adopt multi-factor coupled modular design ideas. The instrument consists of an overall frame module, a mechanical loading module, an in-situ monitoring module, and a high-temperature loading module. The mechanical loading module includes a hydraulic loading sub-module, an ultrasonic loading sub-module and a sample transposition sub-module, and the in-situ monitoring module includes a three-dimensional infrared thermal Imaging sub-module, high-depth microscopic imaging sub-module, CT scanning imaging sub-module. Standardize and modularize equipment for easy maintenance.

2. It can effectively prevent the surface oxidation of the tested sample. The mechanical pump (external device) and the molecular pump (external device) can be used to extract the air (oxygen) in the vacuum chamber by two-stage vacuuming, or continuously pass inert gas into the vacuum chamber to remove the air (oxygen), and build a vacuum or inert gas. Gas atmosphere to prevent oxidation of the surface of the test sample.

3. It can realistically simulate the actual service conditions of materials. The invention adopts hydraulic servo drive technology, electric servo drive technology, piezoelectric ultrasonic drive technology, and resistance wire radiation heating technology, which can realize high-precision loading of the high-temperature temperature field and high-frequency mechanical load of the tested sample, and truly simulate aviation, aerospace and other industries. Actual service conditions of materials in key fields such as automobiles.

4. Parallel in-situ monitoring of damage information inside the sample can be realized. The invention integrates a high-depth-of-field microscopic imaging device, an infrared thermal imaging device, and a CT scanning device, and can realize the synchronous characterization and three-dimensional reconstruction of the defect information of the tested sample from the inside to the outside, from the outside to the inside, and is suitable for aviation, aerospace and automobiles. It provides a reliable method to study the fatigue performance and deformation damage mechanism of materials in key fields such as high temperature and ultrasonic fatigue.

Description of drawings

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The schematic examples of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

Fig. 1 is the overall appearance structure schematic diagram of the present invention;

Fig. 2 is the structural schematic diagram of the overall frame module of the present invention;

3 is a schematic structural diagram of a mechanical loading module of the present invention;

4 is a schematic structural diagram of an ultrasonic loading sub-module of the present invention;

5 is a schematic structural diagram of a sample transposition sub-module of the present invention;

6 is a schematic structural diagram of a hydraulic loading sub-module of the present invention;

7 is a schematic structural diagram of an in-situ monitoring module of the present invention;

8 is a schematic structural diagram of a CT scanning imaging sub-module of the present invention;

9 is a schematic structural diagram of a three-dimensional infrared thermal imaging sub-module and a high-depth-of-field microscopic imaging sub-module of the present invention;

10 is a front view of the high temperature loading module of the present invention;

Figure 11 is a rear view of the high temperature loading module of the present invention;

12 is a schematic structural diagram of the temperature measuring assembly of the present invention;

13 is a schematic structural diagram of the rotary seal assembly of the present invention;

Fig. 14 is the distribution diagram of the vibration displacement and stress of the ultrasonic loading sub-module of the present invention;

Fig. 15 is the distribution diagram of the vibration displacement and stress of the high-temperature connecting rod of the present invention;

16 is a schematic diagram of the parallel in-situ monitoring of the present invention;

17 is a schematic structural diagram of the embedded quartz observation window assembly of the present invention;

18 is a schematic diagram of load loading and in-situ testing of the present invention;

FIG. 19 is a schematic structural diagram of an hourglass-shaped ultrasonic sample.

In the figure: 1. Overall frame module; 2. Mechanical loading module; 3. In-situ monitoring module; 4. High temperature loading module; 5. Installation platform; 6. Upright column fixing sleeve; 7. CT fixing plate I; 8. Upright column Connection block; 9. Upper support plate; 10. Locking screw; 11. Lifting ring screw; 12. Upright column; 13. Cold air gun support plate; 14. CT fixing plate II; 15. Hydraulic loading sub-module; 16. Ultrasonic loading sub-module Module; 17. Sample transposition sub-module; 18. Intermediate connecting plate; 19. Lower connector fixing plate I; 20. Lower nut; 21. Lower ultrasonic connector; 22. Lower high-temperature connecting rod; 23. Upper high-temperature connecting rod ; 24, upper connector fixing plate I; 25, upper ultrasonic connector; 26, ultrasonic transducer; 27, middle connecting rod; 28, force sensor; 29, force sensor fixing plate; 30, uploading force rod; 31, Upper connector fixing plate II; 32. Upper nut; 33. Upper ultrasonic probe; 34. Ultrasonic sample; 35. Lower ultrasonic probe; 36. Lower connector fixing plate II; 37. Lower dowel rod; 38. Expansion Sleeve I; 39, Spline Shaft; 40, Commercial Motor Drive Components; 41, Expansion Sleeve II; 42, Expansion Sleeve III; 43, Upper Hydraulic Cylinder; 44, Upper Accumulator; 45, Upper Valve Plate Assembly ;46, upper piston rod; 47, lower piston rod; 48, lower valve plate assembly; 49, lower accumulator; 50, lower hydraulic cylinder; 51, 3D infrared thermal imaging sub-module; 52, high depth of field microscopy imaging sub Module; 53, CT scanning imaging sub-module; 54, CT three-degree-of-freedom positioning platform; 55, CT host; 56, high-resolution receiving plate; 57, receiving plate Z-direction positioning platform; 58, mounting frame; 59, support plate ;60, fixed seat; 61, guide rail seat; 62, "H" type mounting plate; 63, guide rail assembly I; 64, microscope mounting plate; 65, high depth of field microscope imaging device; 66, microscope three-degree-of-freedom positioning platform; 67, fixed bottom plate; 68, slider assembly I; 69, infrared thermal imaging device; 70, refrigeration assembly; 71, upper dynamic sealing bellows; 72, vacuum chamber; 73, left quartz observation window; 74, cavity support seat ;75, "L" type support; 76, cavity door lock; 77, lower dynamic sealing bellows; 78, heating furnace; 79, guide rail assembly II; 80, front quartz observation window; 81, vacuum pressure gauge; 82, gas spring assembly; 83, vacuum chamber door; 84, chamber door handle; 85, hinge; 86, slider assembly II; 87, rotary seal assembly I; 88, right quartz observation window; 89, embedded quartz observation Window assembly; 90, vacuum bellows assembly; 91, rotary seal assembly II; 92, infrared thermometer I; 93, infrared thermometer II; 94, sealing ring I; 95, sealing ring assembly; 96, sealing ring II ; 97, sealing sleeve; 98, sealing flange.

Detailed ways

The details of the present invention and the specific implementations thereof will be further described below with reference to the accompanying drawings.

1 to 19, the high temperature ultrasonic fatigue in-situ testing instrument and testing method of the present invention is composed of an overall frame module, a mechanical loading module, a high-temperature loading module and an in-situ monitoring module. Among them: the overall frame module is used to accurately position each functional module, while providing stable support and effective vibration isolation; the mechanical loading module is used to simultaneously apply static tensile/compression loads to both ends of the tested sample, and ultrasonic fatigue loads are applied according to the test requirements. , and can achieve precise axial indexing; the high-temperature loading module is used to apply high-temperature load to the tested sample; the in-situ monitoring module is used to perform parallel in-situ monitoring of the surface deformation damage and internal damage defects of the tested sample. The present invention provides a high-temperature ultrasonic fatigue in-situ testing method in order to meet the major demands of the fields of aerospace, equipment manufacturing and other fields for testing and guaranteeing the mechanical properties of key materials, which has the advantages of complex load environment, high testing accuracy, and can dynamically monitor the mechanical behavior of materials at the same time. Characterization of damage mechanisms with deformation.

1 to 13, the high-temperature ultrasonic fatigue in-situ testing instrument of the present invention includes an overall frame module 1, a mechanical loading module 2, an in-situ monitoring module 3, and a high-temperature loading module 4. The overall frame module 1 adopts a four-column type The structure is used to achieve firm support for the mechanical loading module 2, the in-situ monitoring module 3, and the high-temperature loading module 4, and to provide precise installation positioning and effective vibration isolation treatment. The mechanical loading module 2 is rigidly connected to the upper support plate 9 and the mounting platform 5 in the overall frame module 1 through the support shell of the commercialized motor drive assembly 40 and the connection flange of the upper hydraulic cylinder 43, respectively, for realizing the test sample. Static tensile/compression loads are applied simultaneously at both ends, ultrasonic fatigue loads are applied according to test requirements, and accurate axial indexing can be achieved. The in-situ monitoring module 3 is rigidly connected to the installation platform 5, the CT fixing plate II14, the column connecting block 8, and the CT fixing plate I7 in the overall frame module 1 through the fixed base plate 67, the fixed seat 60, the guide rail seat 61 and the mounting bracket 58, respectively. It is used to realize the simultaneous characterization and three-dimensional reconstruction of the defect information of the tested sample from the inside to the outside, from the outside to the inside; the high temperature loading module 4 is rigidly connected to the installation platform 5 of the overall frame module 1 through the "L"-shaped support 75 , and connect with the upper and lower ultrasonic probes 33 and 35 in the mechanical loading module 2 through the upper and lower dynamic sealing bellows 71 and 77, which can construct a vacuum or inert gas atmosphere to isolate oxygen and realize high temperature loading of the tested sample. .

Referring to FIG. 2 , the overall frame module 1 of the present invention includes an installation platform 5 , a column fixing sleeve 6 , a CT fixing plate I7 , a column connecting block 8 , an upper support plate 9 , a locking screw 10 , an eye bolt 11 , and a column 12 , Cold air gun support plate 13, CT fixing plate II 14, etc. The installation platform 5 is fixed on the ground by the anchor screws, the lower end of the column 12 is in interference fit with the column fixing sleeve 6, and the upper end of the column 12 is connected with the upper support plate 9 through the locking screw 10. Rigid connection, CT fixing plate I7, cold air gun support plate 13, CT fixing plate II14 are rigidly connected to the column 12 through the column connecting block 8, and the lifting ring screw 11 is rigidly connected to the upper support plate 9 to achieve firm support for the remaining modules , and provide accurate installation positioning and effective vibration isolation treatment.

Referring to FIG. 3, the mechanical loading module 2 of the present invention includes a hydraulic loading sub-module 15, an ultrasonic loading sub-module 16 and a sample indexing sub-module 17. The hydraulic loading sub-module 15 passes through the upper and lower piston rods 46 and 47 respectively. It is rigidly connected with the expansion sleeve II41 of the sample indexing sub-module 17 and the expansion and tightening sleeve I38 of the ultrasonic loading sub-module 16; the sample indexing sub-module 17 is rigidly connected with the intermediate connecting rod 27 of the ultrasonic loading sub-module 16 through the expansion sleeve III42 , In one test, the test sample can be simultaneously loaded with double-end synchronous static tensile load, ultrasonic fatigue load and axial accurate indexing.

Referring to FIG. 4 , the ultrasonic loading sub-module 16 of the present invention is used to realize the ultrasonic fatigue loading of the tested sample. High temperature connecting rod 22, upper high temperature connecting rod 23, upper connector fixing plate I24, upper ultrasonic connector 25, ultrasonic transducer 26, intermediate connecting rod 27, force sensor 28, force sensor fixing plate 29, uploading force rod 30, The upper connector fixing plate II31, the upper nut 32, the upper ultrasonic probe 33, the ultrasonic sample 34, the lower ultrasonic probe 35, the lower connector fixing plate II36, the lower force transmission rod 37, the expansion sleeve I38, etc. It is rigidly connected with the force sensor 28, the force sensor 28 is rigidly connected with the force sensor fixing plate 29, the force sensor fixing plate 29 is rigidly connected with the uploading rod 30, and the uploading rod 30 passes through the upper connector fixing plate II31 and the upper connector fixing plate I24. , The upper nut 32 is rigidly connected with the upper ultrasonic connector 25, the expansion sleeve I38 is rigidly connected with the intermediate connecting plate 18, the intermediate connecting plate 18 is rigidly connected with the lower power transmission rod 37, and the lower power transmission rod 37 is fixed through the lower connector fixing plate I19 , the lower connector fixing plate II 36, the lower nut 20 is rigidly connected with the lower ultrasonic connector 21, the ultrasonic transducer 26, the upper ultrasonic connector 25, the upper ultrasonic probe 33, the upper high temperature connecting rod 23, the ultrasonic sample 34, the lower high temperature The connecting rod 22 , the lower ultrasonic probe 35 , and the lower ultrasonic connector 21 are all rigidly connected by double-ended studs, so as to realize ultrasonic fatigue loading of the test sample.

The dimensions of the upper and lower high-temperature connecting rods 23 and 22 in the ultrasonic loading sub-module 16 are specially designed and combined with simulation analysis to ensure that they can match the ultrasonic system and achieve longitudinal vibration at 20 kHz; The connecting rods 23 and 22 are provided with symmetrically distributed "H"-shaped cooling channels, and the outlet/inlet of the cooling channels are set at the vibration displacement nodes, so as to reduce the impact of the cooling water pipes on the upper and lower high-temperature connecting rods 23 and 22. vibration disturbance.

Referring to FIG. 5 , the sample indexing sub-module 17 of the present invention is composed of a commercial motor drive assembly 40, an expansion sleeve II 41, an expansion sleeve III 42, etc., wherein the commercial motor drive assembly 40 is composed of the expansion sleeve II 41, The shaft connected to the expansion sleeve III42 is the spline shaft 39. During the test, the hydraulic loading sub-module 15 can drive the spline shaft 39 to perform linear motion, and the sample indexing sub-module 17 can drive the spline shaft 39 to perform rotational movement, thereby At the same time, the static tensile loading and precise axial indexing of the tested sample are realized.

6 , the hydraulic loading sub-module 15 of the present invention consists of an upper hydraulic cylinder 43, an upper accumulator 44, an upper valve plate assembly 45, an upper piston rod 46, a lower piston rod 47, a lower valve plate assembly 48, a lower accumulator The upper accumulator 44 is installed on the upper valve plate assembly 45, and the upper valve plate assembly 45 is rigidly connected with the upper hydraulic cylinder 43 through bolts; the lower accumulator 49 is installed on the lower valve plate assembly. 48, the lower valve plate assembly 48 is rigidly connected with the lower hydraulic cylinder 50 through bolts, so as to realize the simultaneous loading of the double-ended static tensile/compressive load on the tested sample.

Referring to FIG. 7 , the in-situ monitoring module 3 of the present invention is connected to the mounting platform 5 , the CT fixing plate II 14 , and the column connecting block in the overall frame module 1 through the fixed base plate 67 , the fixed seat 60 , the guide rail seat 61 and the mounting bracket 58 respectively. 8. The CT fixing plate I7 is rigidly connected to realize the synchronous characterization and three-dimensional reconstruction of the defect information of the tested sample from the inside to the outside, from the outside to the inside.

8 and 9, the in-situ monitoring module 3 of the present invention includes a three-dimensional infrared thermal imaging sub-module 51, a high-depth microscopic imaging sub-module 52, and a CT scanning imaging sub-module 53, wherein the three-dimensional infrared thermal imaging sub-module 53. The module 51 is used to realize the three-dimensional reconstruction of the temperature information of the gauge length section of the tested sample, including the guide rail seat 61, the "H" type mounting plate 62, the guide rail assembly I63, the slider assembly I68, the infrared thermal imaging device 69, etc., two The infrared thermal imaging devices 69 are placed on the "H" type mounting plate 62, and the two are at a certain angle, so as to realize the three-dimensional reconstruction of the global temperature information of the gauge length section of the tested sample; the high depth of field microscopic imaging sub-module 52 is used to realize the microscopic observation of the surface defect information of the tested sample, including the microscope mounting plate 64, the high-depth-of-field microscopic imaging device 65, the microscope three-degree-of-freedom positioning platform 66, the fixed base plate 67, etc. The high-depth-of-field microscopic imaging device 65 passes Bolts are fixed on the microscope mounting plate 64, and the microscope mounting plate 64 is fixed on the microscope three-degree-of-freedom positioning platform 66 by bolts. Driven by the microscope three-degree-of-freedom positioning platform 66, the high-depth-of-field microscopic imaging device 65 can be relative to the sample to be tested. The axial and radial positions of the test sample can be adjusted quickly and accurately, so as to realize the follow-up monitoring of the surface morphology and defects of the central micro-area of the test sample; the CT scanning imaging sub-module 53 is used to realize the test sample standard distance 3D reconstruction of the global defect information, including CT three-degree-of-freedom positioning platform 54, CT host 55, high-resolution receiving plate 56, receiving plate Z-direction positioning platform 57, mounting frame 58, support plate 59, fixing seat 60, etc., CT The host 55 is fixed on the support plate 59 by bolts, the support plate 59 is fixed on the CT three-degree-of-freedom positioning platform 54 by bolts, the CT three-degree-of-freedom positioning platform 54 is fixed on the fixed seat 60 by bolts, and the high-resolution receiving plate 56 passes through The bolts are fixed on the Z-direction positioning platform 57 of the receiving plate, and the Z-direction positioning platform 57 of the receiving plate is fixed on the mounting frame 58 by bolts. The axial and radial positions can be adjusted quickly and accurately; driven by the Z-direction positioning platform 57 of the receiving plate, the high-resolution receiving plate 56 can be quickly and accurately adjusted relative to the axial direction of the sample to be tested. The CT host 55 and the high-resolution The receiving plate 56 is used together to realize layer-by-layer scanning and imaging of the gauge length segment of the test sample.

The "H" type mounting plate 62 is connected with the slider assembly I68 through bolts, the slider assembly I68 is matched with the guide rail assembly I63, the guide rail assembly I63 is rigidly connected with the guide rail seat 61 through bolts, and the "H" type mounting plate 62 is processed on the There are threaded holes, and blind holes are processed at the corresponding positions of the guide rail seat 61 . The “H” type mounting plate 62 can move up and down along the guide rail assembly 163 and is fixed to the guide rail seat 61 by bolts.

10 to 12 , the high-temperature loading module 4 of the present invention is composed of a refrigeration assembly 70 , an upper dynamic sealing bellows 71 , a vacuum chamber 72 , a left quartz observation window 73 , a cavity support seat 74 , and an “L”-shaped support 75 , chamber door lock 76, lower dynamic sealing bellows 77, heating furnace 78, guide rail assembly II 79, front quartz observation window 80, vacuum pressure gauge 81, gas spring assembly 82, vacuum chamber door 83, chamber door handle 84, hinge 85. Slider assembly II86, rotary seal assembly I87, right quartz observation window 88, embedded quartz observation window assembly 89, vacuum bellows assembly 90, rotary seal assembly II91, infrared thermometer I92, infrared thermometer II93, etc. Composition, vacuum or inert gas atmosphere can be constructed to isolate oxygen to achieve high temperature loading of up to 1200 °C on the tested sample. The refrigeration assembly 70 is rigidly connected to the cold air gun support plate 13 by screws; the left quartz observation window 73, the front quartz observation window 80, and the right quartz observation window 88 are rigidly connected to the outer wall of the vacuum chamber 72 by screws; the chamber door locker 76, the chamber door The handle 84 is rigidly connected to the outer wall of the vacuum chamber 72 by screws; the hinge 85 is rigidly connected to the vacuum chamber 72 and the vacuum chamber door 83 by screws;

In the high temperature loading module 4, the gas spring assembly 82 is rigidly connected to the flange of the upper dynamic sealing bellows 71 through bolts, so as to limit the axial rotational freedom of the bellows and prevent the bellows from being damaged by torsion.

Referring to FIG. 13 , in the high-temperature loading module 4 of the present invention, the rotary seal assemblies I, II 87 and 91 include a seal ring I 94 , a seal ring assembly 95 , a seal ring II 96 , a seal shaft sleeve 97 , and a seal flange 98 , etc. , the sealing ring assembly 95 is embedded in the sealing groove of the shaft shoulder of the upper ultrasonic probe 33, the sealing ring I94 is embedded in the sealing groove of the sealing flange 98, the sealing ring II96 is embedded in the sealing groove on the flange of the upper dynamic sealing bellows 71, and the rotary seal Assemblies I, II 87 and 91 cooperate with the upper and lower ultrasonic probes 33 and 35 to achieve rotary sealing.

In the high temperature loading module 4, the built-in quartz observation window assembly 89 is an independent module, which is fixed on the outer wall of the vacuum chamber 72 by bolts for easy disassembly; the built-in quartz observation window assembly 89 is composed of inner and outer layers of quartz glass. , There is a gap between the inner and outer layers of quartz glass, which is used to pass circulating cooling water to achieve cooling. The bottom of the outer layer of quartz glass is close to the furnace wall of the heating furnace 78, and the inner diameter of the inner layer of quartz glass is slightly larger than that of the high-depth-of-field microscopic imaging device 65. The outer diameter of the lens, the lens of the high-depth-of-field microscopic imaging device 65 can be inserted into the built-in quartz observation window assembly 89 during the test to meet its microscopic imaging distance requirements.

In the above-mentioned high temperature loading module 4, the cavity support seat 74 is welded on the side wall of the vacuum chamber 72 and is rigidly connected with the slider assembly II86 through bolts, the slider assembly II86 cooperates with the guide rail assembly II79, and the guide rail assembly II79 is connected to the guide rail assembly II79 through bolts. The "L"-shaped support 75 is rigidly connected, and the "L"-shaped support 75 is rigidly connected to the mounting platform 5 through bolts. When the normal temperature test is performed, the vacuum chamber 72 can move along the guide rail, providing sufficient operating space for the test personnel.

Referring to FIGS. 1 to 17 , in the high-temperature ultrasonic fatigue in-situ test method of the present invention, when the high-temperature ultrasonic fatigue in-situ test is performed, the specific steps are as follows:

Step 1. Clamping of the ultrasonic sample 34: Move the "H"-shaped mounting plate 62 to the upper limit position along the guide rail assembly I63, and fix it with bolts. This step is to avoid the vacuum chamber door 83 being opened and closed with the three-dimensional infrared thermal imaging. The sub-module 51 interferes; the vacuum chamber door 83 is opened, and the ultrasonic sample 34 is rigidly connected to the upper and lower high-temperature connecting rods 23 and 22 through the double-ended stud;

Step 2. High-temperature loading of the ultrasonic sample 34: use a mechanical pump (external device) and a molecular pump (external device) to extract the air (oxygen) in the vacuum chamber 72 by two-stage vacuuming to build a vacuum environment, or pump the air into the vacuum chamber. The inert gas is continuously introduced into the vacuum chamber 72 to remove the air (oxygen) in the vacuum chamber 72, and an inert gas atmosphere is constructed; the temperature controller introduces different voltages to the resistance wires in the heating furnace 78 to make it generate heat, and realizes it by thermal radiation. High temperature loading of ultrasonic sample 34 at different temperatures; infrared thermometers I, II 92, 93 monitor the temperature of ultrasonic sample 34 gauge section in real time, and feed it back to the temperature controller to form closed-loop control;

Step 3. Static tensile/compressive load loading of the ultrasonic sample 34: The static tensile/compressive load loading of the ultrasonic sample 34 is realized by the mechanical loading module 2, and the upper and lower high-pressure oil drives the piston rods 46 and 47 to move toward each other, The power is transmitted to the ultrasonic loading sub-module 16 to drive the upper and lower high-temperature connecting rods 23 and 22 to move toward each other, so as to realize the static tensile/compressive load loading of the ultrasonic sample 34;

Step 4. Ultrasonic fatigue load loading of the ultrasonic sample 34: The ultrasonic fatigue load loading of the ultrasonic sample 34 is realized by the ultrasonic loading sub-module 16, and the weak mechanical vibration output by the ultrasonic transducer 26 passes through the upper ultrasonic connector 25 and the upper ultrasonic wave. After the two poles of the probe 33 are amplified, they are sequentially transmitted to the upper high-temperature connecting rod 23, the ultrasonic sample 34, the lower high-temperature connecting rod 22, the lower ultrasonic probe 35, and the ultrasonic connector 21. These parts are excited to form a stable resonance at 20 kHz, and the realization of Ultrasonic fatigue load loading of ultrasonic sample 34;

Step 5. Axial indexing of the ultrasonic sample 34: The axial indexing of the ultrasonic sample 34 is realized by the sample indexing sub-module 17, and the power output by the servo motor in the commercial motor drive assembly 40 is transmitted to the speed reducer. The spline shaft 39 drives the ultrasonic loading sub-module 16 to rotate to realize the axial indexing of the ultrasonic sample 34;

Step 6. Parallel in-situ monitoring of the ultrasonic sample 34: The parallel in-situ monitoring of the ultrasonic sample 34 is realized by the in-situ monitoring module 3. In the three-dimensional infrared thermal imaging sub-module 51, two infrared thermal imaging devices 69 are placed On the "H"-shaped mounting plate 62, and the two are at a certain angle, the three-dimensional reconstruction of the temperature information of the gauge length section of the tested sample is realized; in the high-depth-of-field microscopic imaging sub-module 52, the microscope three-degree-of-freedom positioning platform 66 The driven high-depth-of-field microscopic imaging device 65 can quickly and accurately adjust the axial and radial positions of the sample to be tested, so as to realize the follow-up monitoring of the surface topography and defects of the micro-area in the center of the gauge length of the sample to be tested; imaging in CT scanning In the sub-module 53, the CT host 55 driven by the CT three-degree-of-freedom positioning platform 54 performs layer-by-layer scanning and imaging of the gauge length segment of the tested sample, so as to realize three-dimensional reconstruction of the global defect information of the gauge length segment of the tested sample; 3D infrared thermal imaging The sub-modules 51 , the high-depth-of-field microscopic imaging sub-module 52 , and the CT scanning imaging sub-module 53 can be used at the same time, or used in combination, or individually, to realize dynamic in-situ monitoring of the ultrasonic sample 34 during the test.

Referring to Fig. 14 to Fig. 19, the relevant formula of the in-situ monitoring of the present invention is as follows:

CT scan imaging principle formula

为穿过被测试样后的射线强度，

为射线入射强度，

为射线衰减系数，

为射线穿过的被测试样厚度。In the formula,

is the ray intensity after passing through the test sample,

is the ray incident intensity,

is the ray attenuation coefficient,

It is the thickness of the test sample through which the ray passes.

The above descriptions are only preferred examples of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made to the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. A high-temperature ultrasonic fatigue in-situ testing instrument, characterized in that: it comprises an integral frame module (1), a mechanical loading module (2), an in-situ monitoring module (3), a high-temperature loading module (4), an integral frame module ( 1) The four-column structure is adopted to achieve firm support for the mechanical loading module (2), the in-situ monitoring module (3), and the high-temperature loading module (4). The mechanical loading module (2) is driven by a commercial motor assembly (40). ), the connecting flange of the upper hydraulic cylinder (43) are rigidly connected with the upper support plate (9) and the mounting platform (5) in the overall frame module (1), so as to realize the synchronous application of static pressure to both ends of the tested sample. Tensile/compressive load, the in-situ monitoring module (3) is connected to the mounting platform ( 5), CT fixed plate II (14), column connecting block (8), CT fixed plate I (7) are rigidly connected to realize the simultaneous characterization and three-dimensional characterization of the defect information of the tested sample from the inside to the outside, from the outside to the inside Reconstruction; the high temperature loading module (4) is rigidly connected to the mounting platform (5) of the overall frame module (1) through the "L"-shaped support (75), and is connected to the mounting platform (5) of the overall frame module (1) through the upper and lower dynamic sealing bellows (71, 77) The upper and lower ultrasonic probes (33, 35) in the mechanical loading module (2) are connected, and a vacuum or inert gas atmosphere is constructed to isolate oxygen, so as to realize high temperature loading of the tested sample; The mechanical loading module (2) comprises a hydraulic loading sub-module (15), an ultrasonic loading sub-module (16) and a sample transposition sub-module (17), and the ultrasonic loading sub-module (16) realizes ultrasonic fatigue of the test sample Loading, the hydraulic loading sub-module (15) respectively passes through the upper and lower piston rods (46, 47), the expansion sleeve II (41) of the sample indexing sub-module (17) and the expansion sleeve of the ultrasonic loading sub-module (16) I (38) Rigid connection; the sample indexing sub-module (17) is rigidly connected to the intermediate connecting rod (27) of the ultrasonic loading sub-module (16) through the expansion sleeve III (42). The tested sample is subjected to double-end synchronous static tensile load loading, ultrasonic fatigue load loading and axial precise indexing; The dimensions of the upper and lower high-temperature connecting rods (23, 22) in the ultrasonic loading sub-module (16) match the ultrasonic system, and achieve longitudinal vibration at 20 kHz; the upper and lower high-temperature connecting rods (23, 22) There are symmetrically distributed "H"-shaped cooling channels, and the outlet/inlet of the cooling channels are set at the vibration displacement nodes to reduce the interference of the cooling water pipes to the vibration of the upper and lower high-temperature connecting rods (23, 22); The in-situ monitoring module (3) includes a three-dimensional infrared thermal imaging sub-module (51), a high-depth-of-field microscopic imaging sub-module (52), and a CT scanning imaging sub-module (53). The three-dimensional infrared thermal imaging sub-module ( The two infrared thermal imaging devices (69) of 51) are both placed on the "H" type mounting plate (62) to realize the three-dimensional reconstruction of the global temperature information in the gauge length section of the test sample; The module (52) is: the high-depth-of-field microscopic imaging device (65) is fixed on the microscope mounting plate (64), the microscope mounting plate (64) is fixed on the microscope three-degree-of-freedom positioning platform (66), and the microscope three-degree-of-freedom positioning platform (66) Driven by the platform (66), the high-depth-of-field microscopic imaging device (65) is rapidly and accurately adjusted relative to the axial and radial positions of the sample to be tested, so as to realize the detection of the surface topography and defects of the micro-area in the center of the gauge length of the sample to be tested. Follow-up monitoring; the CT scanning imaging sub-module (53) is: the CT host (55) is fixed on the support plate (59), the support plate (59) is fixed on the CT three-degree-of-freedom positioning platform (54), the CT three-degree-of-freedom positioning platform (54) The degree of freedom positioning platform (54) is fixed on the fixing base (60), the high-resolution receiving plate (56) is fixed on the receiving plate Z-direction positioning platform (57), and the receiving plate Z-direction positioning platform (57) is fixed on the mounting frame (58), driven by the CT three-degree-of-freedom positioning platform (54), the CT host (55) is quickly and accurately adjusted relative to the axial and radial positions of the sample to be tested; the Z-direction positioning platform (57) on the receiving plate ), the high-resolution receiving plate (56) is quickly and accurately adjusted relative to the axial direction of the sample to be tested. The CT host (55) is used in conjunction with the high-resolution receiving plate (56) to realize the standard length of the sample to be tested. Slice-by-slice scanning, imaging. 2. The high-temperature ultrasonic fatigue in-situ testing instrument according to claim 1, wherein the "H" type mounting plate (62) is connected to the slider assembly I (68), and the slider assembly I (68) Cooperate with the guide rail assembly I (63), the guide rail assembly I (63) is rigidly connected with the guide rail seat (61), the "H" type mounting plate (62) is machined with threaded holes, and the corresponding position of the guide rail seat (61) is machined with blinds. The "H" type mounting plate (62) moves up and down along the guide rail assembly I (63), and is fixed with the guide rail seat (61) by bolts. 3. The high-temperature ultrasonic fatigue in-situ testing instrument according to claim 1, characterized in that: in the high-temperature loading module (4), the gas spring assembly (82) and the flange of the upper dynamic sealing bellows (71) The rigid connection limits the axial freedom of the bellows and prevents the bellows from being damaged by torsion. 4. The high-temperature ultrasonic fatigue in-situ testing instrument according to claim 1, characterized in that: in the high-temperature loading module (4), the rotary seal assemblies I, II (87, 91) comprise a sealing ring I (94) , sealing ring assembly (95), sealing ring II (96), sealing shaft sleeve (97), sealing flange (98), the sealing ring assembly (95) is embedded in the sealing groove of the shaft shoulder of the upper ultrasonic probe (33), sealing Ring I (94) is embedded in the sealing groove of the sealing flange (98), and the sealing ring II (96) is embedded in the sealing groove on the flange of the upper dynamic sealing bellows (71). ) cooperates with the upper and lower ultrasonic probes (33, 35) to achieve rotary sealing. 5. The high-temperature ultrasonic fatigue in-situ testing instrument according to claim 1, characterized in that: in the high-temperature loading module (4), the embedded quartz observation window assembly (89) is an independent module, which is fixed by bolts On the outer wall of the vacuum chamber (72); the built-in quartz observation window assembly (89) is composed of inner and outer layers of quartz glass, there is a gap between the inner and outer layers of quartz glass, and circulating cooling water is introduced to achieve cooling, and the bottom of the outer layer of quartz glass is Close to the furnace wall of the heating furnace (78), the inner diameter of the inner layer of quartz glass is larger than the outer diameter of the lens of the high-depth-of-field microscopic imaging device (65), and the lens of the high-depth-of-field microscopic imaging device (65) penetrates into the embedded quartz glass during the test. observation window assembly (89) to meet its microscopic imaging distance requirements. 6. The high-temperature ultrasonic fatigue in-situ testing instrument according to claim 1, characterized in that: in the high-temperature loading module (4), the cavity support seat (74) is welded on the side wall of the vacuum cavity (72), And it is rigidly connected with the slider assembly II (86) through bolts, the slider assembly II (86) is matched with the guide rail assembly II (79), and the guide rail assembly II (79) is rigidly connected with the "L" type support (75) through bolts , the "L"-shaped support (75) is rigidly connected with the installation platform (5), when the normal temperature test is performed, the vacuum chamber (72) moves along the guide rail, providing sufficient operating space for the test personnel. 7. the test method of the high temperature ultrasonic fatigue in-situ testing instrument according to any one of claims 1 to 6, is characterized in that: concrete steps are as follows: Step 1. Clamping of the ultrasonic sample (34): move the "H" type mounting plate (62) along the guide rail assembly I (63) to the upper limit position, and fix it with bolts; open the vacuum chamber door (83), put the ultrasonic The sample (34) is rigidly connected with the upper and lower high-temperature connecting rods (23, 22) through studs; Step 2. High temperature loading of the ultrasonic sample (34): a vacuum environment is constructed in the vacuum chamber (72), or an inert gas is continuously introduced into the vacuum chamber (72) to construct an inert gas atmosphere; the temperature controller is directed to the heating furnace (78) The resistance wire inside is connected to different voltages to make it generate heat, and the ultrasonic sample (34) is loaded at different temperatures at high temperature by means of thermal radiation; infrared thermometers I and II (92, 93) monitor the ultrasonic sample in real time. (34) The temperature of the gauge length section is fed back to the temperature controller to form closed-loop control; Step 3. Static tensile/compressive load loading of the ultrasonic sample (34): The static tensile/compressive load loading of the ultrasonic sample (34) is realized by the mechanical loading module (2), and the upper and lower high-pressure oil drives the piston rod (46, 47) move towards each other, transmit the power to the ultrasonic loading sub-module (16), drive the upper and lower high-temperature connecting rods (23, 22) to move towards each other, and realize the static tensile/compression load on the ultrasonic sample (34). load; Step 4. Ultrasonic fatigue load loading of the ultrasonic sample (34): The ultrasonic fatigue load loading of the ultrasonic sample (34) is realized by the ultrasonic loading sub-module (16), and the weak mechanical vibration output by the ultrasonic transducer (26) is processed by the ultrasonic loading sub-module (16). After the two poles of the upper ultrasonic connector (25) and the upper ultrasonic probe (33) are amplified, they are sequentially transmitted to the upper high-temperature connecting rod (23), the ultrasonic sample (34), the lower high-temperature connecting rod (22), and the lower ultrasonic probe (35). ) and the lower ultrasonic connector (21), to excite these parts to form a stable resonance at 20 kHz, so as to realize the ultrasonic fatigue load loading of the ultrasonic sample (34); Step 5. Axial indexing of the ultrasonic sample (34): The axial indexing of the ultrasonic sample (34) is realized by the sample indexing sub-module (17), and the output of the servo motor in the commercialized motor drive assembly (40) The power from the spool is transmitted to the spline shaft (39) through the reducer, and drives the ultrasonic loading sub-module (16) to rotate, so as to realize the axial indexing of the ultrasonic sample (34); Step 6. Parallel in-situ monitoring of the ultrasonic sample (34): The parallel in-situ monitoring of the ultrasonic sample (34) is realized by the in-situ monitoring module (3). In the three-dimensional infrared thermal imaging sub-module (51), two Each infrared thermal imaging device (69) is placed on the "H"-shaped mounting plate (62) to realize three-dimensional reconstruction of the temperature information in the gauge length section of the tested sample; in the high-depth-of-field microscopic imaging sub-module (52), The microscope three-degree-of-freedom positioning platform (66) drives the high-depth-of-field microscopic imaging device (65) to quickly and accurately adjust the axial and radial positions of the sample to be tested, so as to realize the surface topography, micro-area of the center of the gauge length of the sample to be tested, Follow-up monitoring of defects; in the CT scanning imaging sub-module (53), the CT host (55) driven by the CT three-degree-of-freedom positioning platform (54) scans and images the gauge length segment of the tested sample layer by layer, so as to realize the detection of the tested sample. Three-dimensional reconstruction of the global defect information in the gauge length section of the test sample; the three-dimensional infrared thermal imaging sub-module (51), the high-depth-of-field microscopic imaging sub-module (52), and the CT scanning imaging sub-module (53) can be used at the same time, or used in combination , or used individually, to achieve dynamic in-situ monitoring of the ultrasonic sample (34) during the test.

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