In-situ neutron diffraction detection device

Abstract

The invention provides an in-situ neutron diffraction detection device, which comprises a box body used for providing a vacuum detection environment; the sample table is arranged in the box body, and a sample to be detected is placed on the sample table; the heating structure is arranged in the box body and is used for heating the sample to be detected; the cooling assembly is arranged in the box body and is used for cooling the sample to be detected; wherein the box body is provided with a neutron diffraction window, and a neutron beam irradiates the sample to be detected through the neutron diffraction window. According to the in-situ neutron diffraction detection device, the defect that residual stress in different process stages cannot be detected in the prior art can be overcome, and continuous detection of residual stress evolution in different process stages is realized, so that the evolution law of the residual stress in the whole cold and hot treatment process is obtained; therefore, a reliable reference is provided for accurate regulation and control of the residual stress.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of neutron diffraction detection, and particularly relates to an in-situ neutron diffraction detection device. BACKGROUND

[0002] Residual stress generated due to temperature gradient in the process of heat treatment of materials and parts exists widely in mechanical parts, and the release of residual stress in the process of processing and use will cause the size deformation of parts, and higher residual tensile stress will cause the fatigue performance of materials to decrease, thereby seriously affecting the performance of materials and the service life of parts. Therefore, the research and regulation of residual stress have attracted extensive attention in the field of mechanical manufacturing.

[0003] In terms of residual stress regulation, there are usually mechanical methods (including stretching or compression method, vibration aging method and pulsation method), heat treatment methods (including constant temperature aging method, thermal aging method, reverse quenching method, deformation heat treatment method and the like), and ultrasonic and magnetic field treatment methods, and the effects of various methods are different. Among them, the heat treatment method is more widely used, but generally the reduction of residual stress by heat treatment will cause the decrease of mechanical properties of materials, so it is necessary to consider the influence of process parameters on residual stress and select appropriate treatment temperature to ensure that the mechanical properties are not sacrificed, and therefore it is particularly necessary to fully master the evolution law of residual stress at different temperatures. In addition, cryogenic treatment is a material processing technology that places materials or parts in a low-temperature environment of-100 DEG C to improve the performance of materials through microstructure changes of materials, and in recent years, it has certain application in the regulation of residual stress of aluminum alloy, aluminum matrix composite and the like.

[0004] In order to accurately regulate the residual stress, it is necessary to fully master the evolution law and mechanism of residual stress at different processing stages, which is the basis for accurate regulation. In terms of detection and evaluation of residual stress, the neutron diffraction method has the advantages of high detection accuracy, non-destructive detection, three-dimensional detection, large penetration depth and the like compared with the X-ray method, blind hole method and profile method, and can accurately evaluate the internal residual stress of parts, and can realize in-situ detection combined with different in-situ devices.

[0005] Traditional residual stress detection means and methods cannot realize in-situ detection of residual stress at different process stages, and cannot obtain the change law of residual stress of parts in a continuous process, so it is difficult to provide favorable conditions for accurate regulation of residual stress. SUMMARY

[0006] The present application provides an in-situ neutron diffraction detection device, which solves the defect that residual stress at different process stages cannot be detected in the prior art, realizes continuous detection of the evolution of residual stress at different process stages, thereby obtains the evolution law of residual stress in the whole cold and hot treatment process, and thus provides a reliable reference for accurate regulation of residual stress.

[0007] The application provides an in-situ neutron diffraction detection device, comprising: a box body for providing a vacuum detection environment; a sample table arranged in the box body, wherein a sample to be detected is placed on the sample table; a heating structure arranged in the box body and used for heating treatment of the sample to be detected; a cooling assembly arranged in the box body and used for cooling treatment of the sample to be detected; wherein a neutron diffraction window is arranged on the box body, and a neutron beam irradiates the sample to be detected through the neutron diffraction window.

[0008] According to the in-situ neutron diffraction detection device provided by the application, the box body comprises an upper box body with an open bottom, a neutron diffraction window in a ring shape and a lower box body with an open top. The upper box body, the neutron diffraction window and the lower box body are sequentially connected in a top-down manner.

[0009] According to the in-situ neutron diffraction detection device provided by the application, a heat insulation sealing piece is arranged between the upper box body and the neutron diffraction window. A heat insulation sealing piece is arranged between the neutron diffraction window and the lower box body.

[0010] According to the in-situ neutron diffraction detection device provided by the application, the heating structure comprises at least one of an induction coil and a heating belt, and the induction coil and / or the heating belt are uniformly wound on the outer surface of the sample to be detected.

[0011] According to the in-situ neutron diffraction detection device provided by the application, the cooling assembly comprises a nitrogen module and a liquid ammonia module. The nitrogen module comprises a nitrogen pipeline connected to the inside of the box body, and an end portion of the nitrogen pipeline in the box body is provided with a nitrogen nozzle. The liquid ammonia module comprises a liquid nitrogen pipeline connected to the inside of the box body and a liquid nitrogen disperser in fluid communication with the liquid nitrogen pipeline, and liquid nitrogen is sprayed into the box body through the liquid nitrogen disperser.

[0012] According to the in-situ neutron diffraction detection device provided by the application, a driving member and a fan in transmission connection with the driving member are further included, the driving member is arranged outside the box body, and the fan is arranged inside the box body and close to the liquid nitrogen disperser.

[0013] According to the in-situ neutron diffraction detection device provided by the application, the nitrogen pipeline comprises a plurality of branch pipelines in communication with the inside of the box body, each of the branch pipelines is provided with the nitrogen nozzle, and the plurality of nitrogen nozzles are uniformly distributed at different sides of the sample to be detected.

[0014] According to the in-situ neutron diffraction detection device provided by the application, the sample table comprises a horizontal mounting table and a lifting structure arranged below the mounting table, and the lifting structure is configured to drive the mounting table to ascend or descend.

[0015] According to the in-situ neutron diffraction detection device provided by the application, the top of the box body is provided with an exhaust port.

[0016] According to the in-situ neutron diffraction detection device provided by the application, the box body is provided with a temperature sensor for detecting the temperature of the sample to be detected, and the temperature sensor is arranged in a spaced manner with the heating structure.

[0017] The in-situ neutron diffraction detection device provided by the application can realize the whole process of cold and hot treatment of the sample, integrate the neutron diffraction window, meet the detection of the residual stress of the sample at different process stages, realize the continuous detection of the residual stress evolution at different process stages, and thus obtain the evolution rule of the residual stress in the whole cold and hot treatment process, thereby providing a reliable reference for accurate control of the residual stress. The box body provides a vacuum detection environment, the vacuum insulation can reduce heat loss, ensures the stability of the temperature field, provides reliable conditions for in-situ monitoring of the quenching and deep cooling process, and can prevent the sample from being oxidized and frosted, thereby ensuring the temperature uniformity and the neutron window transmittance. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 Fig. 1 is a structural schematic view of the in-situ neutron diffraction detection device provided by the application.

[0020] Reference signs: 10, sample stage; 101, mounting table; 102, lifting structure; 11, heating structure; 12, neutron diffraction window; 13, upper box; 14, lower box; 15, heat insulation sealing element; 16, temperature sensor; 17, nitrogen module; 171, nitrogen pipeline; 172, nitrogen nozzle; 173, branch pipeline; 18, liquid ammonia module; 181, liquid nitrogen pipeline; 182, liquid nitrogen disperser; 183, electromagnetic valve; 19, driving member; 20, fan; 21, exhaust port; 100, sample. DETAILED DESCRIPTION

[0021] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0022] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0023] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection, or communication; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0025] As shown in Figure 1 The present application provides a kind of in-situ neutron diffraction detection device, comprising: Box, the box is used to provide installation space and vacuum detection environment; Sample stage 10, be located in the box, to be detected sample 100 is placed on the sample stage 10; Heating structure 11, be located in the box, for the heating treatment of the to-be-detected sample 100; Cooling assembly, be located in the box, for the cooling treatment of the to-be-detected sample 100; Wherein, the box is equipped with neutron diffraction window 12, neutron beam passes through the neutron diffraction window 12 and irradiates the to-be-detected sample 100.

[0026] Specifically, the in-situ neutron diffraction detection device of the present application can realize continuous detection of the residual stress evolution of the metal sample 100 (hereinafter referred to as sample 100) at different process stages of solid solution quenching, cryogenic treatment, and aging treatment (tempering), thereby providing a residual stress detection means for the whole process of cold and hot treatment of metal components. By obtaining the evolution law of residual stress in the whole cold and hot treatment process, a reliable reference is provided for accurate control of residual stress. Among them, the sample table 10, the heating structure 11 and the cooling assembly are integrated in the box, which can accurately control the temperature of the sample 100, and can perform the whole process of solid solution quenching, cryogenic treatment, and aging treatment. Moreover, the neutron diffraction window 12 is provided on the box to meet the neutron diffraction detection, and the overall structure of the device is simple and easy to operate. Each process stage can be detected by neutron diffraction in time, which is conducive to providing accurate residual stress data and ensuring experimental results. The vacuum environment is formed in the box, and the heat loss can be reduced by vacuum insulation to ensure the stability of the temperature field and provide reliable conditions for in-situ monitoring of quenching and cryogenic processes. Moreover, it can prevent the sample 100 from oxidizing and frosting, thereby ensuring temperature uniformity and neutron window transmittance. The box is connected with a vacuum generating device, for example, to provide a vacuum environment for the box during the process treatment by the vacuum generating device.

[0027] As a preferred embodiment of the present application, the box comprises an upper box 13 with an open bottom, a neutron diffraction window 12 in the form of a ring, and a lower box 14 with an open top. The upper box 13, the neutron diffraction window 12, and the lower box 14 are connected in sequence from top to bottom.

[0028] The box of the present application adopts a three-section structure for splicing, wherein the upper box 13 and the lower box 14 may, for example, adopt a vacuum insulated box, and the box material may, for example, be selected from stainless steel and the like, which is compatible with providing a vacuum environment and high temperature resistance, thereby providing a reliable environment for quenching and cryogenic treatment of the sample 100, while having good mechanical strength. The ring-shaped structure in the middle serves as the neutron diffraction window 12, which is formed by splicing and combining to form an overall box. On the one hand, it is easy to process and can reduce the processing difficulty, and on the other hand, it can provide a neutron irradiation range of 360 degrees in the circumferential direction, support neutron propagation from multiple different angles, and facilitate detection of different sites of the sample 100, thereby improving the accuracy of the detection results. The neutron diffraction window 12 may, for example, be made of vacuum insulated aluminum alloy or SiC glass, to ensure a certain neutron transmittance.

[0029] Further, in order to improve the heat insulation and sealing performance of the overall box, a heat insulation sealing piece 15 can be used to connect the two sections at the splicing position, and low-temperature glue is used for bonding, so as to reduce the heat leakage at the connection position and avoid frost formation at the window position. That is, the heat insulation sealing piece 15 is arranged between the upper box 13 and the neutron diffraction window 12, and the heat insulation sealing piece 15 is also arranged between the neutron diffraction window 12 and the lower box 14, and the adjacent box structures are connected by the low-temperature glue. The heat insulation sealing piece 15 can be made of a plurality of layers of heat insulation materials, such as aluminum foil and polyimide film, which are alternately stacked, so as to reduce the thermal conductivity. Alternatively, the heat insulation sealing piece 15 can be made of a non-metal material, which is selected according to actual needs.

[0030] The heating structure 11 of the present application can adopt the form of induction heating or direct electric heating, which is selected flexibly according to actual needs. In order to improve the heating uniformity, the heating structure can be in the form of a wire or a strip, which is wound on the outer surface of the sample 100, so as to cover a large range of the sample 100, improve the heating efficiency, and improve the heating uniformity.

[0031] As a preferred embodiment of the present application, the heating structure 11 includes at least one of an induction coil and a heating strip, and the induction coil and / or the heating strip are uniformly wound on the outer surface of the sample 100.

[0032] As shown in Figure 1 whether the induction coil or the heating strip is used or both are used, the spiral winding can be conveniently performed on the outer surface of the sample 100, and the line spacing of the spiral winding can be controlled according to the required heating effect, so as to improve the heating efficiency and uniformity. When the induction coil is used, the alternating current is passed into the coil through the high-frequency induction power supply, a magnetic field is generated, the magnetic field penetrates the metal sample 100 to induce eddy current inside, heat is generated through the resistance effect to heat the sample 100; this mode has high heating efficiency. When the heating strip is used, the heat generated by the heating strip after being electrified can heat the sample 100 through heat conduction and radiation, and the structure is simple and the cost is low. The use of the induction coil and / or the heating strip can realize rapid heating and heat preservation of the workpiece, so as to realize heat treatment at different temperatures.

[0033] Preferably, the box is provided with a temperature sensor 16 for detecting the temperature of the sample 100, which is arranged in a spaced manner with the heating structure 11. The temperature sensor 16 is arranged in the region of the sample 100 which is not wound by the coil or the heating belt. For example, in some embodiments, the sample 100 is divided into two symmetrical winding regions in the upper and lower parts, and the temperature sensor 16 is arranged in the space between the two winding regions, so that the temperature sensor 16 is arranged close to the middle of the sample 100, and the detected temperature of the sample 100 is relatively accurate. Of course, in other embodiments, when the winding regions are arranged continuously or only one winding region is arranged, the temperature sensor 16 can be arranged at any position of the upper end, the middle or the lower end of the sample 100, as long as it is away from the coil or the heating belt.

[0034] As a preferred embodiment of the present application, the cooling assembly comprises a nitrogen module 17 and a liquid ammonia module 18. The nitrogen module 17 comprises a nitrogen pipeline 171 which is communicated with the inside of the box, and a nitrogen nozzle 172 which is arranged at the end of the nitrogen pipeline 171 in the inside of the box. The liquid ammonia module 18 comprises a liquid nitrogen pipeline 181 which is communicated with the inside of the box, and a liquid nitrogen disperser 182 which is in fluid communication with the liquid nitrogen pipeline 181, and the liquid nitrogen is sprayed into the box through the liquid nitrogen disperser 182.

[0035] Through the cooperation of the nitrogen module 17 and the liquid ammonia module 18, the sample 100 can be rapidly cooled under the double cooling effect, and a large temperature range can be provided, which provides favorable conditions for the cryogenic treatment of the sample 100. In addition, suitable modules can be selected for work according to different process stages, so as to improve the flexibility. For example, during the quenching stage of the sample 100, only the nitrogen module 17 can be used, the liquid ammonia module 18 can be used as a backup solution, or the two modules can be used together to accelerate the cooling of the sample 100. During the cryogenic treatment stage, only the liquid ammonia module 18 can be used, or the two modules can be used together.

[0036] By setting the nitrogen gas nozzle 172, high-pressure nitrogen gas forms a high-speed airflow through the porous nozzle array, directly impacting the sample 100 surface to take away heat, which can improve the efficiency of convective heat transfer. By setting the liquid nitrogen disperser 182, liquid nitrogen can be atomized into small droplets or uniform airflow, covering the entire surface of the sample 100 through the porous structure or cyclone nozzle, which can achieve three-dimensional uniform cooling while avoiding interference with neutron detection and avoiding frost formation of liquid nitrogen gas on the observation window, thereby ensuring neutron beam transmittance. In order to reduce the interference of neutron beam scattering, the liquid nitrogen can be guided to the heat exchanger on the side of the sample stage 10, and indirect cooling is achieved through the heat conduction block, or when direct spraying is used, a superfine atomizing nozzle is used to reduce the scattering of gas-liquid phase flow to neutrons. The nitrogen gas nozzle 172 and the liquid nitrogen disperser 182 can both use a porous structure, and the specific pore size is set according to actual needs.

[0037] In some embodiments, the in-situ neutron diffraction detection device further comprises a driving member 19 arranged outside the box body and a fan 20 driven by the driving member 19, wherein the fan 20 is arranged inside the box body and close to the liquid nitrogen disperser 182.

[0038] As shown in Figure 1 , by setting the fan 20, the fan 20 cooperates with the cooling assembly, the fan 20 can drive the low-temperature nitrogen gas to circulate in the box body, break the thermal boundary layer of natural convection, and make the cold nitrogen gas fully contact with the surface of the sample 100, thereby improving the heat exchange efficiency; the fan 20 can uniformly deliver the atomized droplets sprayed from the liquid nitrogen disperser 182 to each part of the sample 100, thereby improving the cooling uniformity and avoiding local overcooling. Specifically, the position of the fan 20 can be arranged above or below the liquid nitrogen disperser 182, as shown in Figure 1 , the fan 20 is arranged between the liquid nitrogen disperser 182 and the nitrogen gas nozzle 172.

[0039] In some embodiments, the nitrogen gas pipeline 171 comprises a plurality of branch pipelines 173 in communication with the inside of the box body, each of the branch pipelines 173 is provided with the nitrogen gas nozzle 172, and a plurality of the nitrogen gas nozzles 172 are uniformly arranged at different sides of the sample 100.

[0040] As shown in Figure 1 , the distribution of two nitrogen gas nozzles 172 is shown, of course, in other examples, the number of nitrogen gas nozzles 172 is not limited to two, for example, three, four or more nitrogen gas nozzles 172 can be arranged at intervals along the circumferential direction of the sample 100. By arranging a plurality of nitrogen gas nozzles 172, nitrogen gas is sprayed to cool the different sides of the sample 100 at the same time, which can improve the cooling rate and the cooling uniformity.

[0041] Further, the nitrogen pipeline 171 is provided with a pressure valve, and the liquid nitrogen pipeline 181 is provided with an electromagnetic valve 183, the nitrogen inlet pressure is controlled through the pressure valve, and the liquid nitrogen flow is controlled through the electromagnetic valve 183, so that the cooling rate can be accurately adjusted to meet the cooling requirements in different scenes.

[0042] As a preferred embodiment of the present application, the sample table 10 comprises a horizontal mounting table 101 and a lifting structure 102 arranged below the mounting table 101, and the lifting structure 102 is configured to drive the mounting table 101 to rise or fall.

[0043] By arranging the height-adjustable mounting table 101, the height of the sample 100 can be adjusted, and in the sample 100 processing stage, the sample 100 is raised to be close to the nitrogen nozzle 172 and the liquid nitrogen disperser 182, which is beneficial to obtain maximum cooling airflow coverage and improve the cooling rate. In the neutron diffraction detection stage, the effective area of the sample 100 is arranged opposite to the neutron diffraction window 12 by accurately adjusting the height of the sample 100, so as to ensure the effect of neutrons. In addition, the height change of the sample 100 can change the angle between the incident neutron beam and the surface of the sample 100, so that multi-angle diffraction data can be obtained without moving the detector, and a more flexible detection means is provided. Since the height of the sample table 10 is adjustable, the height of the sample 100 itself does not need to be worried, and the device is suitable for detection of samples 100 of various specifications, and the universality of the device can be improved. The lifting structure 102 can adopt a conventional pneumatic drive or motor drive structure, which will not be described in detail here.

[0044] As a preferred embodiment of the present application, the top of the box body is provided with an exhaust port 21.

[0045] As shown in Figure 1 By arranging the exhaust port 21, the exhaust can be carried out in combination with different process stages of the sample 100, such as high-temperature exhaust gas emission, which is also beneficial to maintaining a certain vacuum degree in the box body.

[0046] The in-situ neutron diffraction detection device provided by the present application can realize the whole process of cold and hot treatment of the sample 100, integrate the neutron diffraction window 12, meet the detection of residual stress of the sample 100 in different process stages, realize continuous detection of residual stress evolution in different process stages, and obtain the evolution rule of residual stress in the whole cold and hot treatment process, thereby providing a reliable reference for accurate control of residual stress. The vacuum detection environment is provided by the box body, the heat loss is reduced by using vacuum insulation, the temperature field is stable, the in-situ monitoring of quenching and deep cooling process is provided with reliable conditions, and the sample 100 can be prevented from being oxidized and frosted, so as to ensure the temperature uniformity and the neutron window transmittance.

[0047] On the basis of the above in-situ neutron diffraction detection device, the application also provides a metal component cold and hot treatment whole-process residual stress in-situ neutron diffraction detection method, which can realize continuous detection of residual stress evolution of a metal solid solution quenching, cryogenic treatment, aging treatment (tempering) at different process stages, and obtain the evolution law of residual stress in the whole cold and hot treatment process.

[0048] In some embodiments, the size of the aluminum alloy component is selected as Φ200mm*60mm as the sample 100, the sample 100 is installed on the sample table 10, in the first process stage, the heating structure 11 is turned on to heat the sample 100, the heating temperature, i.e., the first temperature (such as 400-800℃) is set, the sample 100 is kept at the set temperature for a certain time, then the power of the heating structure 11 is turned off, the cooling assembly is started to cool the sample 100, and when the temperature of the sample 100 cools to the set temperature and is uniform, the neutron diffraction residual stress detection is started, the sample 100 can be selected to be detected at different positions along the circumference at the same height, or the positions at different heights can be selected to be detected. By adjusting the cooling rate and the box temperature, the residual stress distribution after quenching treatment of different parameters can be realized.

[0049] After the quenching state residual stress detection is completed, the second process stage is entered, the cooling assembly is started to cool the sample 100 at a certain rate, different low-temperature temperatures, i.e., the second temperature (such as -120℃, -160℃, -180℃) are set, the neutron diffraction detection is started after the sample 100 is kept at the set temperature for a certain time, and the residual stress at different temperatures is detected at the same position (usually the center position).

[0050] After the in-situ detection during the cryogenic treatment process is completed, the third process stage is entered, the heating structure 11 is started, the aging temperature of the sample 100, i.e., the third temperature (such as 120-180℃) is set, and the residual stress at the same position under different holding times is detected after the temperature is uniform.

[0051] When the cooling assembly is started in different process stages, any one of the nitrogen module 17 and the liquid ammonia module 18 can be started according to the needs, both modules can be started at the same time, or the two modules can be alternately started to achieve better cooling effect.

[0052] Through the above detection device and method, the residual stress distribution of the aluminum alloy component at different stages of solid solution quenching, cryogenic treatment and aging treatment can be obtained.

[0053] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An in-situ neutron diffraction detection device, characterized in that: include: A box body, wherein the box body is used to provide a vacuum detection environment; A sample stage (10) is provided in the box, and a sample to be tested (100) is placed on the sample stage (10); A heating structure (11) is provided in the box body and is used to heat the sample to be tested (100); A cooling component, disposed in the box, for cooling the sample (100) to be tested; A neutron diffraction window (12) is provided on the box, and the neutron beam irradiates the sample to be detected (100) through the neutron diffraction window (12).

2. The in-situ neutron diffraction detection device according to claim 1, characterized in that: The box includes an upper box (13) with an open bottom, a ring-shaped neutron diffraction window (12), and a lower box (14) with an open top; The upper box body (13), the neutron diffraction window (12), and the lower box body (14) are spliced ​​and connected in sequence from top to bottom.

3. The in-situ neutron diffraction detection device according to claim 2, characterized in that: A heat-insulating seal (15) is provided between the upper box (13) and the neutron diffraction window (12); A heat-insulating seal (15) is provided between the neutron diffraction window (12) and the lower box (14).

4. The in-situ neutron diffraction detection device according to claim 1, characterized in that: The heating structure (11) comprises at least one of an induction coil and a heating belt, and the induction coil and / or the heating belt are uniformly wound around the outer surface of the sample to be detected (100).

5. The in-situ neutron diffraction detection device according to claim 1, characterized in that: The cooling assembly includes a nitrogen module (17) and a liquid ammonia module (18); The nitrogen module (17) includes a nitrogen pipeline (171) connected to the interior of the box, and a nitrogen nozzle (172) is provided at the end of the nitrogen pipeline (171) located inside the box; The liquid ammonia module (18) comprises a liquid nitrogen pipeline (181) connected to the interior of the box body and a liquid nitrogen disperser (182) in fluid communication with the liquid nitrogen pipeline (181), and liquid nitrogen is sprayed into the box body through the liquid nitrogen disperser (182).

6. The in-situ neutron diffraction detection device according to claim 5, characterized in that: Also includes: A driving member (19) and a fan (20) connected to the driving member (19) in a transmission manner, wherein the driving member (19) is arranged outside the box, and the fan (20) is arranged inside the box and close to the liquid nitrogen disperser (182).

7. The in-situ neutron diffraction detection device according to claim 5, characterized in that: The nitrogen pipeline (171) includes a plurality of branch pipelines (173) connected to the interior of the box, each branch pipeline (173) is provided with a nitrogen nozzle (172), and the plurality of nitrogen nozzles (172) are distributed on different sides of the sample to be tested (100).

8. The in-situ neutron diffraction detection device according to claim 1, characterized in that: The sample stage (10) comprises a horizontal mounting platform (101) and a lifting structure (102) provided below the mounting platform (101), wherein the lifting structure (102) is configured to drive the mounting platform (101) to rise or fall.

9. The in-situ neutron diffraction detection device according to claim 1, characterized in that: An exhaust port (21) is provided on the top of the box.

10. The in-situ neutron diffraction detection device according to any one of claims 1 to 9, characterized in that: A temperature sensor (16) for detecting the temperature of the sample (100) to be detected is provided in the box, and the temperature sensor (16) is spaced apart from the heating structure (11).

Images