Multifunctional in-situ mechanical testing machine applied to synchrotron radiation and testing method thereof

Abstract

The invention provides a multifunctional in-situ mechanical testing machine applied to synchrotron radiation and a testing method thereof, a host comprises a room-temperature testing part and a high-temperature testing part which are arranged up and down, and a DIC camera is placed on the outer side of the host; the room temperature test part comprises a room temperature clamping device and a first monitoring device, an observation hole is formed in the side face of the room temperature test part, and the DIC camera collects strain of a sample clamped by the room temperature clamping device through the observation hole; the high-temperature test part comprises a high-temperature clamping device, a heating device, a water cooling device and a second monitoring device; a driving device is arranged between the room-temperature testing part and the high-temperature testing part and is in driving connection with the room-temperature clamping device and the high-temperature clamping device respectively. The indoor temperature and high temperature integrated design is adopted, the middle actuating piston is shared, switching between the high temperature mode and the indoor temperature mode can be achieved, one machine has two purposes, the cost and the equipment weight can be greatly reduced, and the device is more suitable for the field condition of a synchrotron radiation light source.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical testing devices, and in particular to a multifunctional in-situ mechanical testing machine applied to synchrotron radiation and a testing method thereof. Background Art

[0002] Synchrotron X-ray diffraction is a technique that uses synchrotron radiation to conduct X-ray diffraction research. Synchrotron radiation is a high-brightness X-ray source with very strong radiation capabilities and high focusing characteristics. By exposing the sample to a synchrotron radiation source, very detailed X-ray diffraction data can be obtained. Synchrotron X-ray diffraction technology can provide high-resolution crystal structure information, as well as information such as the crystallography, surface structure, and defect structure of the material. It can be used to study the phase change behavior of the material, lattice distortion, the stress state of the material, and other issues, which is of great significance for understanding the properties of materials and developing new materials.

[0003] The existing Chinese patent with publication number CN201320673859 discloses a synchrotron radiation X-ray diffraction in-situ stretching device, which has three major components: a loader, a driver, and a fixed bracket. The loading component is mainly made of high-strength aluminum alloy or titanium alloy, including a base, a load driving part, a load transmission part, a sample fixture part, a stretching sensor part, and a Chinese guide rail part; the driver is integrated with a data acquisition card and a motor driver, and this part and the loader are independent of each other; the fixed bracket is made of high-strength aluminum alloy, and has a detachable interface at the bottom. The device is designed based on the principle of X-ray reflection optical path, and the sample loading fixture and load sensor highly meet the requirements. It can be effectively applied to the original microstructure and performance integrated test, and realizes the dynamic process of the distribution of stress and strain of each phase of the material in situ by using high-energy X-rays, and measures the mechanical properties of the material in the microscopic phase size analysis. The shortcomings of the existing technology are: the equipment can only perform stretching experiments, and the stretching space is limited. In order not to block the X-rays, a series of geometric conditions need to be met; the displacement change is used to replace the strain of the sample, which is not accurate enough; it does not have high temperature testing capabilities.

[0004] The existing Chinese patent with publication number CN201910210664 discloses a large load and high frequency in-situ tensile and fatigue testing machine based on X-ray imaging, wherein the imaging displacement table is rotatably mounted on the experimental platform, the base is fixed on the imaging displacement table, the frame is mounted on the base, the servo hydraulic cylinder is mounted on the frame, the lower clamp is screwed on the upper end of the piston rod of the hydraulic cylinder, the support seat platform is fixed on the four columns of the frame, the support cylinder is located above the support seat platform, the transparent enclosure is embedded between the support seat platform and the support barrel, the upper clamp is fixed on the support cylinder, the electro-hydraulic servo valve is connected to the upper and lower oil chambers of the hydraulic cylinder respectively, and the load sensor, the electro-hydraulic servo valve and the X-ray detector are connected to the data acquisition and control unit and the data processing unit in sequence. The shortcomings of the prior art are: synchrotron radiation X-ray imaging can reveal the formation of macroscopic defects, but cannot provide the evolution of the microstructure of the material, and cannot analyze the distribution of microscopic stress and strain; it does not have high temperature testing capabilities; the sample needs to be scanned during X-ray imaging, but this device can only scan 180°.

[0005] Therefore, the inventors believe that it is necessary to provide a multifunctional in-situ mechanical testing machine for synchrotron radiation. By adopting an integrated design of room temperature and high temperature, a dual purpose machine can be achieved. Both static and dynamic tests can be carried out at high and room temperatures. Static tests include tension and compression, and dynamic tests include fatigue and creep. It can also greatly reduce costs and equipment weight, and is more suitable for the site conditions of synchrotron radiation light sources. Summary of the invention

[0006] In view of the defects in the prior art, the object of the present invention is to provide a multifunctional in-situ mechanical testing machine and a testing method thereof for use with synchrotron radiation.

[0007] According to the present invention, a multifunctional in-situ mechanical testing machine for synchrotron radiation comprises a mainframe and an electric control cabinet, wherein the mainframe comprises a room temperature test section and a high temperature test section arranged above and below, a DIC camera is placed outside the mainframe, and the electric control cabinet is electrically connected to the room temperature test section, the high temperature test section and the DIC camera respectively;

[0008] The room temperature test part comprises a room temperature clamping device and a first monitoring device, an observation hole is provided on the side of the room temperature test part, and the DIC camera collects the strain of the sample clamped by the room temperature clamping device through the observation hole;

[0009] The high temperature test section includes a high temperature clamping device, a heating device, a water cooling device and a second monitoring device;

[0010] A driving device is provided between the room temperature test part and the high temperature test part, and the driving device is drivingly connected to the room temperature clamping device and the high temperature clamping device respectively.

[0011] Preferably, the driving device comprises a piston and a silent oil source, the piston is connected to the silent oil source via a servo valve, and the piston can move up and down.

[0012] Preferably, the room temperature clamping device comprises a detachably mounted upper room temperature clamp and a lower room temperature clamp, the upper room temperature clamp and the lower room temperature clamp cooperate to clamp the vertical sample, the piston is transmission-connected to the lower room temperature clamp, and the lower room temperature clamp can move up and down.

[0013] Preferably, the first monitoring device comprises a first force sensor, and the first force sensor is arranged at the upper end of the room temperature upper fixture.

[0014] Preferably, the high temperature test part includes a high temperature chamber and a high temperature frame, the high temperature chamber is equipped with a high temperature chamber sealing plate, the high temperature chamber sealing plate is provided with an exhaust screw, the heating device includes a heating resistance wire, and a plurality of the heating resistance wires are distributed on the circumferential inner wall of the high temperature chamber.

[0015] Preferably, the high temperature clamping device comprises a detachably mounted high temperature lower clamp and a high temperature upper clamp, the high temperature lower clamp and the high temperature upper clamp cooperate to clamp the vertical sample, the piston is transmission-connected to the high temperature upper clamp, and the high temperature upper clamp can move up and down.

[0016] Preferably, the second monitoring device comprises a second force sensor and a thermocouple, the second force sensor is arranged at the lower end of the high temperature fixture, and the thermocouple is arranged in the middle of the high temperature test part;

[0017] The water cooling device comprises a water cooling machine, and one or more cooling water interfaces connected to the water cooling machine are arranged above the high temperature test part.

[0018] According to a test method of a multifunctional in-situ mechanical testing machine applied to synchrotron radiation provided by the present invention, the multifunctional in-situ mechanical testing machine applied to synchrotron radiation is used, including a room temperature test method and a high temperature test method.

[0019] Preferably, the room temperature test method comprises the following steps:

[0020] Step A1, placing a DIC camera on the side of the room temperature test part, and collecting the strain of the sample through the observation hole;

[0021] Step A2, grinding the sample surface with sandpaper and mechanically polishing until there are no obvious scratches, then electropolishing to eliminate the stress layer, and spraying speckle on the side of the sample for subsequent DIC camera measurement;

[0022] Step A3, press the sample with a room temperature upper clamp, adjust the length and verticality of the sample clamp, and then pre-tighten it with a first fastening screw, and adjust the center position of the sample so that the synchrotron radiation X-ray just passes through the gauge length section of the stretched sample;

[0023] Step A4, the piston moves upward to a preset position, and then the room temperature fixture is installed and pre-tightened with a second fastening screw;

[0024] Step A5, turn on the force holding function of the electric control cabinet and set it to 0N, and then completely tighten the room temperature upper clamp and the room temperature lower clamp;

[0025] Step A6, adjust the brightness and focus of the DIC camera to the clearest speckle, set the standard length of DIC acquisition calculation to 2mm, start collecting strain first, and then turn on the host and synchrotron radiation X-ray at the same time to collect fatigue data and diffraction data respectively.

[0026] Preferably, the high temperature test method comprises the following steps:

[0027] Step B1, polish the sample surface with sandpaper, open the sealing plate of the high temperature chamber, press the sample with a high temperature clamp, adjust the length and verticality of the sample clamp, and then pre-tighten it with the third fastening screw, and adjust the center position of the sample so that the synchrotron radiation X-ray just passes through the gauge length section of the tensile sample;

[0028] Step B2, the piston moves downward to a preset position, and then the high-temperature upper fixture is installed and pre-tightened with the fourth fastening screw;

[0029] Step B3, turn on the force holding function of the electric control cabinet and set it to 0N, and then completely tighten the high-temperature lower clamp and the high-temperature upper clamp;

[0030] Step B4, after the sample is installed, tighten the high temperature chamber sealing plate with the door screws, open the argon source and the exhaust screws on the high temperature chamber sealing plate, let the argon gas exhaust the air in the high temperature chamber, then re-tighten the exhaust screws and close the argon source;

[0031] Step B5, open the temperature control software of the electric control cabinet, set the target temperature and heating rate, keep the temperature for half an hour after reaching the set temperature, and then turn on the host and synchrotron radiation X-ray at the same time to collect stretching data and diffraction data respectively.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention adopts a room temperature and high temperature integrated design, and divides the main unit into two parts, a room temperature part and a high temperature part, which share the middle actuating piston. In actual operation, it is only necessary to connect different controllers to the electric control cabinet to achieve the switching between high temperature and room temperature modes, thus achieving dual uses of one machine, and greatly reducing the cost and weight of the equipment, making it more suitable for the site conditions of synchrotron radiation light sources.

[0034] 2. The present invention uses a DIC camera to measure the strain of the sample in the room temperature test section instead of using the displacement change to calculate the strain. It will not be affected by the fixture and the frame. DIC can obtain more accurate strain, thereby greatly improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0036] Figure 1 This is a schematic diagram of the structure of the room temperature test part of the present invention;

[0037] Figure 2 This is a schematic diagram of the external structure of the high temperature test part of the present invention;

[0038] Figure 3 It is a schematic diagram of the internal structure of the high temperature test part mainly embodied in the present invention.

[0039] As shown in the figure:

[0040] DIC camera 1 Observation hole 2 Sample 3

[0041] Room temperature upper fixture 4 First fastening screw 5 Piston 6

[0042] Room temperature fixture 7 Second fastening screw 8 First force sensor 9

[0043] Servo valve 10 First bolt 11 Room temperature frame 12

[0044] Heating resistance wire 13 High temperature chamber sealing plate 14 High temperature clamp 15

[0045] Third fastening screw 16 High temperature upper clamp 17 Fourth fastening screw 18

[0046] Door screw 19 Air vent screw 20 Second force sensor 21

[0047] Second bolt 22 High temperature frame 23 Cooling water interface 24

[0048] Thermocouple 25 DETAILED DESCRIPTION

[0049] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0050] Example 1

[0051] like Figure 1-3 As shown, a multifunctional in-situ mechanical testing machine for synchrotron radiation provided by the present invention includes a main machine and an electric control cabinet. The main machine includes a room temperature test part and a high temperature test part arranged upper and lower. A DIC camera 1 is placed on the outside of the main machine, and the electric control cabinet is electrically connected to the room temperature test part, the high temperature test part and the DIC camera 1 respectively; the room temperature test part includes a room temperature clamping device and a first monitoring device, and an observation hole 2 is arranged on the side of the room temperature test part, and the DIC camera 1 collects the strain of a sample 3 clamped by the room temperature clamping device through the observation hole 2; the high temperature test part includes a high temperature clamping device, a heating device, a water cooling device and a second monitoring device; a driving device is arranged between the room temperature test part and the high temperature test part, and the driving device is drivingly connected to the room temperature clamping device and the high temperature clamping device respectively.

[0052] The room temperature test section includes a room temperature frame 12 and a first bolt 11, and the high temperature test section includes a high temperature frame 23 and a second bolt 22. The room temperature frame 12 and the high temperature frame 12 play a fixed support role and require a certain rigidity, otherwise they are easy to deform during the test. The first bolt 11 and the second bolt 22 are used to fix the room temperature test section and the high temperature test section to the adapter plate, respectively, and then fixed to the platform of the synchrotron radiation source through the adapter plate. The equipment can be used upside down.

[0053] The driving device includes a piston 6 and a silent oil source. The piston 6 is connected to the silent oil source through a servo valve 10, and the piston 6 can move up and down.

[0054] The room temperature clamping device comprises a detachably mounted upper room temperature clamp 4 and a lower room temperature clamp 7, the upper room temperature clamp 4 and the lower room temperature clamp 7 cooperate to clamp the vertical sample 3, the piston 6 is transmission-connected to the lower room temperature clamp 7, and the lower room temperature clamp 7 can move up and down.

[0055] The first monitoring device comprises a first force sensor 9 , which is arranged at the upper end of the room temperature upper fixture 4 .

[0056] The high temperature test section includes a high temperature chamber, which is equipped with a high temperature chamber sealing plate 14, on which an exhaust screw 20 is provided, and a heating device includes a heating resistor 13, and a plurality of heating resistors 13 are distributed on the inner wall of the high temperature chamber.

[0057] The high temperature clamping device includes a detachably mounted high temperature lower clamp 15 and a high temperature upper clamp 17, which cooperate to clamp the vertical sample 3, and the piston 6 is transmission-connected to the high temperature upper clamp 17, which can move up and down.

[0058] The second monitoring device includes a second force sensor 21 and a thermocouple 25, wherein the second force sensor 21 is arranged at the lower end of the high temperature fixture 15, and the thermocouple 25 is arranged at the middle of the high temperature test part;

[0059] The water cooling device includes a water cooler, and one or more cooling water interfaces 24 connected to the water cooler are arranged above the high temperature test part.

[0060] The main unit is divided into two parts, the room temperature part and the high temperature part, with a common piston 6 as the drive in the middle. The two sides are respectively equipped with a first force sensor 9 and a second force sensor 21. When in use, you only need to switch the sensor according to the use temperature. This application integrates two traditional devices into one device, which not only realizes dual-purpose, but also greatly reduces the cost and equipment weight. The main unit weighs no more than 15kg, which is more suitable for the site conditions of synchrotron radiation light sources. The electric control cabinet integrates all control systems and performs a series of controls on the equipment through self-developed software, including load control, displacement control, temperature control, etc. Silent oil source and water cooler use commercial equipment.

[0061] When working, first connect the power supply, coolant, heating wire, thermocouple and other gas circuits of the equipment. Select the appropriate controller according to the temperature of the experiment and connect it to the electric control cabinet. After opening the self-developed test software, select the parameters of the corresponding controller and connect the communication between the equipment and the software.

[0062] This application adopts an integrated design of room temperature and high temperature, innovatively connecting the room temperature test section and the high temperature test section together, sharing the middle actuating piston. In actual operation, it is only necessary to connect different controllers to the electrical control cabinet to switch between high temperature and room temperature modes, achieving dual use of one machine.

[0063] This application is equipped with DIC to measure the strain of the sample during the experiment, instead of using the displacement change to calculate the strain. The displacement change is affected by the fixture and the frame, so there is a large error between the calculated strain and the actual value. Using DIC can obtain more accurate strain.

[0064] Two sets of control software developed independently are used in conjunction with this application, corresponding to static tests and dynamic tests respectively. Static tests include tension and compression, and dynamic tests include fatigue and creep. Both static and dynamic tests can be performed at high temperatures and room temperatures.

[0065] This application fully considers the characteristics of synchrotron radiation X-ray diffraction and physical space limitations, and designs an integrated multifunctional testing machine, which greatly reduces the size of the equipment, enriches the equipment functions, and is equipped with room temperature and high temperature dual spaces, and the mode can be flexibly switched according to the required temperature during use.

[0066] Example 2

[0067] Based on Example 1, a test method for a multifunctional in-situ mechanical testing machine applied to synchrotron radiation provided in accordance with the present invention includes a room temperature test method and a high temperature test method.

[0068] When conducting a room temperature experiment, select a room temperature controller and connect it to the electrical control cabinet. The room temperature test method includes the following steps:

[0069] Step A1, placing a DIC camera 1 on the side of the room temperature test part, and collecting the strain of the sample 3 through the observation hole 2;

[0070] Step A2, grinding the surface of the sample 3 with 320-mesh, 600-mesh, 1000-mesh and 2000-mesh sandpapers respectively, and mechanically polishing until there are no obvious scratches, and then electrolytic polishing is performed to eliminate the stress layer, and the side of the sample 3 is sprayed with speckle for subsequent measurement by the DIC camera 1;

[0071] Step A3, press the sample 3 with the upper clamp 4 at room temperature, adjust the length and verticality of the sample 3, and then slightly tighten it with the first fastening screw 5, and use the lifting platform provided by the light source to adjust the center position of the sample 3 so that the synchrotron radiation X-ray just passes through the gauge length section of the stretched sample 3. The light source is equipped with a red laser at the same position as the X-ray for position calibration, which facilitates fine adjustment of the sample 3 and the equipment to ensure that the position is accurate;

[0072] Step A4, controlling the piston 6 to move upward to a preset position through the software system, and then installing the room temperature clamp 7 and slightly tightening it with the second fastening screw 8;

[0073] Step A5, turn on the force holding function in the software of the electric control cabinet and set it to 0N, which can avoid introducing prestress when tightening the sample 3, and then completely tighten the room temperature upper clamp 4 and the room temperature lower clamp 7;

[0074] Step A6, open the DIC software, adjust the brightness and focus of DIC camera 1 to the clearest speckle, set the standard length of DIC acquisition calculation to 2 mm, start collecting strain first, and then turn on the equipment and synchrotron radiation X-ray at the same time to collect fatigue data and diffraction data respectively.

[0075] When conducting a high temperature experiment, a high temperature controller is selected and connected to the electric control cabinet. Since the heating resistors 13 are arranged around the high temperature chamber, it is impossible to set an observation window from the side. Therefore, the high temperature test uses displacement instead of strain. The high temperature test method includes the following steps:

[0076] Step B1, polish the surface of sample 3 with 320 mesh, 600 mesh, 1000 mesh and 2000 mesh sandpaper respectively, open the high temperature chamber sealing plate 14, press sample 3 with the high temperature lower clamp 15, adjust the clamping length and verticality of sample 3, and then tighten it slightly with the third fastening screw 16. Because there is a difference in height between the room temperature part and the high temperature part, it is necessary to readjust the height through the lifting platform provided by the light source so that the step radiated X-ray just passes through the gauge section of the stretched sample 3. The light source is equipped with a red laser at the same position as the X-ray for calibration, which is convenient for fine-tuning of sample 3 and equipment to ensure accurate position;

[0077] Step B2, control the piston 6 to move downward to a preset position through the software system, then install the high-temperature upper clamp 17 and slightly tighten it with the fourth fastening screw 18;

[0078] Step B3, turn on the force holding function in the software of the electric control cabinet and set it to 0N, which can avoid introducing prestress when tightening the sample 3, and then completely tighten the high-temperature lower clamp 15 and the high-temperature upper clamp 17;

[0079] Step B4, after the sample 3 is installed, tighten the high temperature chamber sealing plate 14 with the door screw 19, open the argon source and the exhaust screw 20 on the high temperature chamber sealing plate 14, and let the argon gas exhaust the air in the high temperature chamber. After about one minute, tighten the exhaust screw 20 again and close the argon source;

[0080] Step B5, open the temperature control software of the electric control cabinet, set the target temperature and heating rate. In this experiment, the target temperature is 400°C, and the heating rate is 20°C / min. After reaching the set temperature, keep it warm for half an hour and then turn on the equipment and synchrotron radiation X-ray at the same time to collect stretching data and diffraction data respectively.

[0081] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0082] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A multifunctional in-situ mechanical testing machine for synchrotron radiation, characterized in that: The device comprises a mainframe and an electric control cabinet, wherein the mainframe comprises a room temperature test section and a high temperature test section arranged above and below, a DIC camera (1) is placed outside the mainframe, and the electric control cabinet is electrically connected to the room temperature test section, the high temperature test section and the DIC camera (1) respectively; The room temperature test section comprises a room temperature clamping device and a first monitoring device, an observation hole (2) is arranged on the side of the room temperature test section, and the DIC camera (1) collects the strain of the sample (3) clamped by the room temperature clamping device through the observation hole (2); The high temperature test section includes a high temperature clamping device, a heating device, a water cooling device and a second monitoring device; A driving device is provided between the room temperature test part and the high temperature test part, and the driving device is drivingly connected to the room temperature clamping device and the high temperature clamping device respectively.

2. The multifunctional in-situ mechanical testing machine for synchrotron radiation according to claim 1, characterized in that: The driving device comprises a piston (6) and a silent oil source, the piston (6) being connected to the silent oil source via a servo valve (10), and the piston (6) being capable of moving up and down.

3. The multifunctional in-situ mechanical testing machine for synchrotron radiation according to claim 1, characterized in that: The room temperature clamping device comprises a detachably mounted upper clamp (4) and a lower clamp (7) at room temperature, wherein the upper clamp (4) and the lower clamp (7) cooperate to clamp a vertical sample (3), and the piston (6) is transmission-connected to the lower clamp (7), and the lower clamp (7) at room temperature can move up and down.

4. The multifunctional in-situ mechanical testing machine for synchrotron radiation according to claim 3, characterized in that: The first monitoring device comprises a first force sensor (9), and the first force sensor (9) is arranged on the upper end of the room temperature upper fixture (4).

5. The multifunctional in-situ mechanical testing machine for synchrotron radiation according to claim 1, characterized in that: The high temperature test section comprises a high temperature chamber and a high temperature frame (23), the high temperature chamber is provided with a high temperature chamber sealing plate (14), an exhaust screw (20) is arranged on the high temperature chamber sealing plate (14), the heating device comprises a heating resistance wire (13), and a plurality of the heating resistance wires (13) are distributed on the inner wall of the circumference of the high temperature chamber.

6. The multifunctional in-situ mechanical testing machine for synchrotron radiation according to claim 1, characterized in that: The high temperature clamping device comprises a detachably mounted high temperature lower clamp (15) and a high temperature upper clamp (17), wherein the high temperature lower clamp (15) and the high temperature upper clamp (17) cooperate to clamp a vertical sample (3), the piston (6) is transmission-connected to the high temperature upper clamp (17), and the high temperature upper clamp (17) can move up and down.

7. The multifunctional in-situ mechanical testing machine for synchrotron radiation according to claim 6, characterized in that: The second monitoring device comprises a second force sensor (21) and a thermocouple (25), wherein the second force sensor (21) is arranged at the lower end of the high temperature clamp (15), and the thermocouple (25) is arranged at the middle of the high temperature test part; The water cooling device comprises a water cooling machine, and one or more cooling water interfaces (24) connected to the water cooling machine are arranged above the high temperature test part.

8. A test method for a multifunctional in-situ mechanical testing machine applied to synchrotron radiation, characterized in that: The multifunctional in-situ mechanical testing machine for synchrotron radiation as described in any one of claims 1 to 7 comprises a room temperature test method and a high temperature test method.

9. The testing method of the multifunctional in-situ mechanical testing machine applied to synchrotron radiation according to claim 8, characterized in that: The room temperature test method comprises the following steps: Step A1, placing a DIC camera (1) on the side of the room temperature test part, and collecting the strain of the sample (3) through the observation hole (2); Step A2, grinding the surface of the sample (3) with sandpaper and mechanically polishing until there are no obvious scratches, then electropolishing to eliminate the stress layer, and spraying speckle on the side of the sample (3) for subsequent measurement by the DIC camera (1); Step A3, pressing the sample (3) with the room temperature upper clamp (4), adjusting the length and verticality of the sample (3) clamped, and then pre-tightening with the first fastening screw (5), adjusting the center position of the sample (3) so that the synchrotron radiation X-ray just passes through the gauge length section of the stretched sample (3); Step A4, the piston (6) moves upward to a preset position, and then the room temperature clamp (7) is installed and pre-tightened with a second fastening screw (8); Step A5, turn on the force holding function of the electric control cabinet and set it to 0N, and then completely tighten the room temperature upper clamp (4) and the room temperature lower clamp (7); Step A6, adjust the brightness and focus of the DIC camera (1) to the clearest speckle, set the DIC acquisition calculation standard length to 2 mm, start collecting strain first, then turn on the host and synchrotron radiation X-ray at the same time to collect fatigue data and diffraction data respectively.

10. The testing method of the multifunctional in-situ mechanical testing machine applied to synchrotron radiation according to claim 8, characterized in that: The high temperature test method comprises the following steps: Step B1, polish the surface of the sample (3) with sandpaper, open the high temperature chamber sealing plate (14), press the sample (3) with the high temperature clamp (15), adjust the clamping length and verticality of the sample (3), and then pre-tighten it with the third fastening screw (16), and adjust the center position of the sample (3) so that the synchrotron radiation X-ray just passes through the gauge section of the tensile sample (3); Step B2, the piston (6) moves downward to a preset position, and then the high-temperature upper clamp (17) is installed and pre-tightened with the fourth fastening screw (18); Step B3, turn on the force holding function of the electric control cabinet and set it to 0N, and then completely tighten the high-temperature lower clamp (15) and the high-temperature upper clamp (17); Step B4, after the sample (3) is installed, tighten the high temperature chamber sealing plate (14) with the door screw (19), open the argon gas source and the exhaust screw (20) on the high temperature chamber sealing plate (14), let the argon gas exhaust the air in the high temperature chamber, then re-tighten the exhaust screw (20), and close the argon gas source; Step B5, open the temperature control software of the electric control cabinet, set the target temperature and heating rate, keep the temperature for half an hour after reaching the set temperature, and then turn on the host and synchrotron radiation X-ray at the same time to collect stretching data and diffraction data respectively.

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