CN117723608A - Material hydrogen embrittlement detection device and method based on electrochemical hydrogen charging test - Google Patents
Material hydrogen embrittlement detection device and method based on electrochemical hydrogen charging test Download PDFInfo
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- CN117723608A CN117723608A CN202410174647.XA CN202410174647A CN117723608A CN 117723608 A CN117723608 A CN 117723608A CN 202410174647 A CN202410174647 A CN 202410174647A CN 117723608 A CN117723608 A CN 117723608A
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- 239000000463 material Substances 0.000 title claims abstract description 113
- 238000012360 testing method Methods 0.000 title claims abstract description 95
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 92
- 239000001257 hydrogen Substances 0.000 title claims abstract description 92
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 84
- 238000001514 detection method Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 26
- 239000011780 sodium chloride Substances 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 27
- 238000010168 coupling process Methods 0.000 claims description 27
- 238000005859 coupling reaction Methods 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000012512 characterization method Methods 0.000 claims description 13
- 238000012549 training Methods 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 11
- 150000002431 hydrogen Chemical class 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005518 electrochemistry Effects 0.000 claims description 2
- 238000002848 electrochemical method Methods 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241001422033 Thestylus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a material hydrogen embrittlement detection device and method based on an electrochemical hydrogen charging test, belonging to the technical field of electrochemical measurement, and comprising the following steps: the device comprises a test container, wherein sodium chloride solution is contained in the test container, stretching mechanisms are symmetrically arranged in the middle of the test container, material samples are vertically placed between the two stretching mechanisms, the material samples are completely immersed in the sodium chloride solution, an electrochemical control box is arranged outside the test container and is electrically connected with the material samples through electrode wires, a working electrode is further arranged on the electrochemical control box, the working electrode is immersed in the sodium chloride solution, an industrial camera is arranged outside the test container, and the industrial camera is directly opposite to the material samples for photographing monitoring; in the invention, in the detection of the hydrogen embrittlement performance of the material, the property, the processing technology and the microstructure data of the material sample can be preferentially acquired and evaluated.
Description
Technical Field
The invention belongs to the technical field of electrochemical measurement, and particularly relates to a device and a method for detecting hydrogen embrittlement of a material based on an electrochemical hydrogen charging test.
Background
The material hydrogen embrittlement is hydrogen induced cracking or hydrogen damage, which is the phenomenon of material mechanical property reduction, plasticity reduction, cracking or damage caused by hydrogen in metal. "delayed destruction" occurs in the case of hydrogen embrittlement, because diffusion of hydrogen atoms takes a certain time to proceed, so that destruction takes a certain time to occur. In the current hydrogen embrittlement test research of metal materials, as in the invention patent with publication number of CN105300874B, the evolution rule of damage is analyzed by testing various aspects such as experimental tensile stress, liquid corrosion performance, hydrogen charge amount, pH value, temperature and the like; the experimental mode is large in labor capacity and various in data processing, a long-term test is needed to obtain the hydrogen embrittlement damage rule of the material, and in a single test, although variable quantities such as tensile stress, pH value and temperature can be experimentally controlled, the detection accuracy is directly affected when the material is immersed in corrosive liquid for a long time and the tensile stress, hydrogen charging amount, pH value and temperature are subsequently readjusted, so that deviation is caused to the hydrogen embrittlement measurement result.
Therefore, it is necessary to provide a device and a method for detecting hydrogen embrittlement of materials based on electrochemical hydrogen charging test, so as to solve the problems in the prior art.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides the following technical solutions: material hydrogen embrittlement detection device based on electrochemistry hydrogen charging test, it includes: the device comprises a test container, wherein sodium chloride solution is contained in the test container, stretching mechanisms are symmetrically distributed in the middle of the test container, material samples are vertically placed between the two stretching mechanisms, the material samples are completely immersed in the sodium chloride solution, an electrochemical control box is arranged outside the test container and is electrically connected with the material samples through electrode wires, and a working electrode is further arranged on the electrochemical control box and immersed in the sodium chloride solution and used for adjusting the voltage value near the material samples;
a hydrogen storage tank is arranged outside the test container, a hydrogen transmission pipeline is connected to the hydrogen storage tank, and one end of the hydrogen transmission pipeline goes deep into the test container; the test container is externally connected with a liquid-changing temperature controller;
and an industrial camera is arranged outside the test container and is opposite to the photographing monitoring of the material sample.
Further, preferably, the stretching mechanism provides pulse tensile stress to detect a material test, wherein before the material sample is subjected to hydrogen embrittlement detection, the material property, the processing technology and the microstructure of the material sample are evaluated, simultaneously, the characterization characteristics of the material sample are combined, hydrogen embrittlement performance reference data corresponding to the material sample are indexed and called according to the obtained characterization data and the obtained material characteristics, the test environment characteristic factors of the material sample are indexed based on the reference data, at the moment, the stretching mechanism adjusts the tensile strength, simultaneously, the hydrogen passing amount of the hydrogen storage tank is controlled, and the test temperature is adjusted by the liquid change temperature controller.
Further, preferably, the stretching mechanism includes: the testing frame, its one side is fixed with the locating plate, one side of locating plate is vertical to be fixed with the guide rail, testing frame one side is provided with L type frame plate, L type frame plate pass through the slider with guide rail looks sliding connection, vertical sliding is provided with the guide cylinder on the testing frame, guide the jar in pass through the shaft coupling with L type frame plate is connected, vertical symmetry is fixed with even post on the L type frame plate, each even equal sliding connection has the fixed plate on the post, the spring has been cup jointed to the below that lies in the fixed plate on even post, all vertical be fixed with branch on the fixed plate, the lower extreme of branch is fixed with the grip block, be provided with dynamic loading mechanism in the guide cylinder, dynamic loading mechanism with the shaft coupling is connected.
Further, as preferable, a transmission tooth holder is mounted on the test frame, a shaft sleeve is rotatably arranged in the center of the transmission tooth holder, a motor is arranged on the test frame, the output end of the motor is in meshed transmission with the transmission tooth holder through a gear, a thread disc is sleeved on the shaft sleeve, a thread groove is formed in the inner wall of the guide cylinder, and the thread disc is in sliding connection with the guide cylinder through a thread meshing effect;
the clamping plates are two distributed left and right, a connecting bolt is transversely connected in series between the two clamping plates, a lock nut is arranged on the connecting bolt, a pull shaft is fixed on the clamping plates, one end of the pull shaft is connected to the other clamping plate in a sliding and penetrating mode, and the pull shaft is positioned for a material test through a positioning hole groove on the end face of a material sample.
Further, preferably, the positioning hole groove is arranged as a vertical bar-shaped hole, the clamping plates are internally and horizontally embedded with contact pins, and the contact pins are slidably arranged in the clamping plates through inner springs and are contacted with the surface of the material sample; and a displacement sensor is also arranged on the clamping plate.
Further, preferably, the dynamic loading mechanism includes: the fixed sleeve is coaxially fixed in the guide cylinder, one end of the coupling is slidably connected in the fixed sleeve, the fixed sleeve is rotationally provided with a coupling pipe, the coupling pipe is rotationally sleeved with one end of the coupling, the fixed sleeve is rotationally provided with a driving shaft, the driving shaft is fixed with the coupling pipe and rotationally drives the coupling pipe, a pin is vertically fixed on the side wall of the coupling, an inner guide groove is formed in the coupling pipe, and the pin is slidably connected in the inner guide groove.
Further preferably, the inner guide groove is constructed in a multi-stage structure, and the slope of each stage of groove hole is different;
the drive shaft is capable of forward and reverse pulse rotation.
Further, as an optimization, a control module is arranged on the stretching mechanism and is connected with a peripheral control system, wherein the peripheral control system builds a training model according to a hydrogen embrittlement performance reference data set of the material sample, the training model scores importance of the characteristics of the property, the processing technology, the microstructure and the characterization characteristic of the material sample, and recommended characteristics are determined according to the importance scores;
model training is carried out on the reference data set based on recommended features, and a plurality of candidate regression models are obtained;
obtaining model scores of the candidate regression models based on a preset model evaluation method, and determining a recommended regression model; repeating data training on the recommended regression model, and detecting the accuracy of the model through a test set in the reference data set;
and defining and minimizing a loss function, and adjusting and optimizing the built regression model.
Further preferably, after the material sample passes through the contact pin and the displacement sensor in the stretching mechanism to obtain the characterization characteristic data, the regression model outputs a test environment characteristic factor target value of the material sample, and the dynamic loading mechanism in the stretching mechanism adjusts the dynamic loading strength based on the output target value.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, in the hydrogen embrittlement performance detection of the material, the property, processing technology and microstructure data of the material sample can be preferentially acquired and evaluated, meanwhile, the characteristic characteristics (coarse superdegree, thickness, corrosion resistance and the like) of the material are combined, the hydrogen embrittlement performance reference data of the material is acquired, at the moment, the experimental environment characteristic factor target value of the material sample is output by the peripheral control system in combination with a training model, so that the experimental tensile stress, the hydrogen flux (concentration), the temperature, the PH value and the like can be correspondingly adjusted by taking the experimental environment characteristic factor target value as a reference, the experimental tensile stress, the hydrogen flux (concentration), the temperature, the PH value and the like can be correspondingly adjusted, the output target value can be matched, and in an experiment, the dynamic loading mechanism in the stretching mechanism can provide micro dynamic tensile stress change, the adjustment corresponding to the groove slope of the inner guide groove section is divided into a multi-section loading stage (step-by-step reinforcement), and the hydrogen embrittlement of the material is detected according to the material stretching test.
Drawings
FIG. 1 is a schematic structural diagram of a material hydrogen embrittlement detection device based on an electrochemical hydrogen charging test;
FIG. 2 is a schematic structural diagram of a stretching mechanism in a material hydrogen embrittlement detection device based on an electrochemical hydrogen charging test;
FIG. 3 is a schematic diagram of the structure of a guide cylinder in a material hydrogen embrittlement detection device based on an electrochemical hydrogen charging test;
FIG. 4 is a schematic structural diagram of a dynamic loading mechanism in a material hydrogen embrittlement detection device based on an electrochemical hydrogen charging test;
FIG. 5 is a schematic structural diagram of a linkage tube in a material hydrogen embrittlement detection device based on an electrochemical hydrogen charging test;
FIG. 6 is a schematic plan view showing the development of an inner channel in a hydrogen embrittlement detection device for materials based on an electrochemical hydrogen charging test;
in the figure: 1. a test vessel; 11. an industrial camera; 12. a liquid-changing temperature controller; 2. an electrochemical control box; 21. a working electrode; 22. a hydrogen storage tank; 23. a hydrogen delivery pipeline; 3. a stretching mechanism; 31. a test rack; 32. a positioning plate; 33. an L-shaped frame plate; 34. a spring; 35. a fixing plate; 36. a support rod; 4. a guide cylinder; 41. coupling shaft; 42. a transmission tooth holder; 43. a shaft sleeve; 44. a threaded disc; 45. a motor; 5. a dynamic loading mechanism; 51. a fixed sleeve; 52. a linkage tube; 53. a drive shaft; 54. a pin; 55. an inner guide groove; 6. a clamping plate; 61. a connecting bolt; 62. pulling a shaft; 63. a stylus.
Detailed Description
Referring to fig. 1 to 6, in an embodiment of the present invention, a material hydrogen embrittlement detection device based on an electrochemical hydrogen charging test includes: the test container 1 is internally provided with a sodium chloride solution, the middle part of the test container 1 is provided with a stretching mechanism 3, the stretching mechanisms 3 are vertically symmetrically distributed, a material sample is vertically arranged between the two stretching mechanisms 3, the material sample is completely immersed in the sodium chloride solution, the test container 1 is externally provided with an electrochemical control box 2, the electrochemical control box 2 is electrically connected with the material sample through an electrode wire (namely, the material sample is taken as a cathode to be placed in the solution), and the electrochemical control box 2 is also provided with a working electrode 21, and the working electrode 21 is immersed in the sodium chloride solution and is used for adjusting a voltage value near the material sample; platinum (Pt) is mostly used as the working electrode, which has excellent catalytic activity and corrosion resistance;
a hydrogen storage tank 22 is arranged outside the test container 1, a hydrogen transmission pipeline 23 is connected to the hydrogen storage tank 22, and one end of the hydrogen transmission pipeline 23 extends into the test container 1; the outside of the test container 1 is connected with a liquid-changing temperature controller 12; it should be noted that the material sample should remain completely immersed in the sodium chloride solution, and in the hydrogen transport in the hydrogen storage tank, hydrogen molecules will be adsorbed onto the surface of the material sample and further diffuse into the metal lattice to form internal hydrogen;
an industrial camera 11 is arranged outside the test container 1, and the industrial camera 11 is used for photographing and monitoring the material sample so as to conduct microscopic observation on the material sample.
In this embodiment, the stretching mechanism 3 provides a pulse tensile stress to detect a material test, where before the material sample is tested for hydrogen embrittlement, the material properties (such as chemical components, lattice structure, phase composition and mechanical properties of the material), the processing technology (such as heat treatment conditions and cold working rate) and microstructure of the material sample are evaluated, and meanwhile, according to the obtained characterization data and material properties, the hydrogen embrittlement performance reference data corresponding to the material sample is indexed and called according to the obtained characterization data and material properties, that is, each piece of the obtained characterization data is compared with a known material hydrogen embrittlement performance database and called with an index, so that data points similar to or corresponding to the current sample are found, and the above information is combined, so as to predict the hydrogen embrittlement sensitivity of the material sample, and at this time, the stretching strength is adjusted based on the test environmental characteristic factors of the material sample, and the hydrogen passing amount of the hydrogen storage tank 22 is controlled by the liquid change temperature controller 12, so as to improve the test environment condition, thereby achieving a single-time and direct-free crack test, and avoiding the single-time test period.
Referring to fig. 2, as a preferred embodiment, the stretching mechanism 3 includes: the testing frame 31, its one side is fixed with locating plate 32, the vertical guide rail that is fixed with in one side of locating plate 32, testing frame 31 one side is provided with L type frame plate 33, L type frame plate 33 pass through the slider with guide rail looks sliding connection, vertical sliding is provided with on the testing frame 31 and leads jar 4, lead jar 4 in pass through shaft coupling 41 with L type frame plate 33 is connected, vertical symmetry is fixed with on the L type frame plate 33 links the post, each link and all sliding connection has fixed plate 35 on the post, link the below that lies in fixed plate 35 on the post and cup jointed spring 34, all vertical be fixed with branch 36 on the fixed plate 35, the lower extreme of branch 36 is fixed with grip block 6, be provided with dynamic loading mechanism 5 in the guide jar 4, dynamic loading mechanism 5 with the shaft coupling 41 is connected, and the guide jar in two tensioning mechanisms can realize the tensile stress adjustment to the material sample in vertical reverse slip.
Referring to fig. 3, in this embodiment, a transmission gear seat 42 is mounted on the test frame 31, a shaft sleeve 43 is rotatably disposed in the center of the transmission gear seat 42, a motor 45 is disposed on the test frame 31, an output end of the motor 45 is in meshed transmission with the transmission gear seat 42 through a gear, a thread disc 44 is sleeved on the shaft sleeve 43, a thread groove is disposed on an inner wall of the guide cylinder 4, the thread disc 44 is meshed with the thread groove, and the thread disc 44 is slidably connected with the guide cylinder 4 through a thread meshing effect; the tensile stress adjustment precision reaches 0.5% -1% of the full range, and the maximum load can reach 2.5kN;
the clamping plates 6 are two distributed left and right, a connecting bolt 61 is transversely connected in series between the two clamping plates 6, a lock nut is arranged on the connecting bolt 61, a pull shaft 62 is fixed on the clamping plates 6, one end of the pull shaft 62 is slidably connected to the other clamping plate 6 in a penetrating manner, and the pull shaft 62 is used for positioning a material test through a positioning hole groove on the end face of a material sample.
In this embodiment, the positioning hole slots are configured as vertical bar-shaped holes, the holding plates 6 are horizontally embedded with contact pins 63, and the contact pins 63 are slidably arranged in the holding plates 6 through inner springs and contact with the surface of the material sample; the clamping plate 6 is further provided with a displacement sensor for detecting the thickness of a material sample, and it is noted that when the material sample is initially clamped and placed, the pull shaft 62 can be abutted against one end of the positioning hole groove, when the stretching mechanism works in a stretching mode, the pull shaft 62 slides along the positioning hole groove, and the roughness value precision of the surface of the material test is obtained under contact induction of the contact pin.
Referring to fig. 4 and 5, in this embodiment, the dynamic loading mechanism 5 includes: the fixed sleeve 51 is coaxially fixed in the guide cylinder 4, one end of the coupling 41 is slidably connected in the fixed sleeve 51, the fixed sleeve 51 is rotatably provided with the coupling pipe 52, the coupling pipe 52 is rotatably sleeved with one end of the coupling 41, the fixed sleeve 51 is rotatably provided with the driving shaft 53, the driving shaft 53 is fixedly connected with the coupling pipe 52 and rotatably drives the coupling pipe 52, the side wall of the coupling 41 is vertically fixed with the pin 54, the coupling pipe 52 is provided with the inner guide groove 55, the pin 54 is slidably connected in the inner guide groove 55, namely, when the driving shaft 53 is rotatably adjusted, the pin 54 slides along the inner guide groove 55, and at the moment, the coupling 41 can correspondingly vertically slide to achieve continuous dynamic adjustment.
Referring to fig. 6, as a preferred embodiment, the inner guiding groove 55 is configured as a multi-stage structure, and the slope of each stage of slot is different;
the driving shaft 53 can perform forward and reverse pulse rotation, for example, the inner guide groove is divided into a three-section structure, the inclination of each section is 10 degrees, 25 degrees and 40 degrees in sequence, in the first stage loading, the pin slides back and forth along the 10-degree inner guide groove (the tensile stress is in the range of 0-50N), the test is usually 1 hour, and the industrial camera detects the surface condition of the material in real time; if cracks are generated, the hydrogen embrittlement performance reference data of the material sample is a true value, and when the material sample can enter a second stage (namely pass a first stage loading test), the test is always kept for 1 hour, the surface condition of the material is observed, and if the cracks are generated, the compensation quantity is added to the hydrogen embrittlement performance reference data of the material sample; and selecting a new material test for retesting, wherein the stretching mechanism is adjusted based on the compensation amount, and when the material sample can enter the third stage, the same steps are adopted.
In this embodiment, a control module is disposed on the stretching mechanism 3, and the control module is connected with a peripheral control system (not shown in the figure), where the peripheral control system constructs a training model according to the hydrogen embrittlement performance reference data set of the material sample, and the training model scores the characteristics of the property, the processing technology, the microstructure and the characterization characteristic of the material sample, and determines the recommended characteristics according to the importance scores;
model training is carried out on the reference data set based on recommended features, and a plurality of candidate regression models are obtained;
obtaining model scores of the candidate regression models based on a preset model evaluation method, and determining a recommended regression model; repeating data training on the recommended regression model, and detecting model accuracy through a test set (30% in the data set) in the reference data set;
defining a loss function, minimizing the loss function, and adjusting and optimizing the built regression model; wherein, the loss function expression is as follows:
y is the label (i.e., the true value), a is the predicted value, and the model accuracy is higher as the loss function is smaller.
In this embodiment, after the material sample passes through the stylus 63 and the displacement sensor in the stretching mechanism 3 to obtain the characterization characteristic data, the regression model outputs the target value of the experimental environmental characteristic factor of the material sample, and the dynamic loading mechanism 5 in the stretching mechanism 3 adjusts the dynamic loading strength based on the output target value.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. Material hydrogen embrittlement detection device based on electrochemistry hydrogen charging test, which is characterized by comprising: the device comprises a test container (1), wherein sodium chloride solution is contained in the test container (1), a stretching mechanism (3) is arranged in the middle of the test container (1), the stretching mechanisms (3) are vertically symmetrically distributed, material samples are vertically placed between the two stretching mechanisms (3), the material samples are completely immersed in the sodium chloride solution, an electrochemical control box (2) is arranged outside the test container (1), the electrochemical control box (2) is electrically connected with the material samples through an electrode wire, a working electrode (21) is further arranged on the electrochemical control box (2), and the working electrode (21) is immersed in the sodium chloride solution and is used for adjusting the voltage value near the material samples;
a hydrogen storage tank (22) is arranged outside the test container (1), a hydrogen transmission pipeline (23) is connected to the hydrogen storage tank (22), and one end of the hydrogen transmission pipeline (23) goes deep into the test container (1); the outside of the test container (1) is connected with a liquid-exchanging temperature controller (12);
an industrial camera (11) is arranged outside the test container (1), and the industrial camera (11) is directly opposite to the photographing monitoring of the material sample;
the stretching mechanism (3) comprises: the testing device comprises a testing frame (31), wherein a positioning plate (32) is fixed on one side of the testing frame, a guide rail is vertically fixed on one side of the positioning plate (32), an L-shaped frame plate (33) is arranged on one side of the testing frame (31), the L-shaped frame plate (33) is connected with the guide rail in a sliding mode through a sliding piece, a guide cylinder (4) is vertically arranged on the testing frame (31) in a sliding mode, the guide cylinder (4) is connected with the L-shaped frame plate (33) through a coupling (41), connecting columns are vertically and symmetrically fixed on the L-shaped frame plate (33), a fixing plate (35) is connected onto each connecting column in a sliding mode, a spring (34) is sleeved below the fixing plate (35), a supporting rod (36) is vertically fixed on the fixing plate (35), a clamping plate (6) is fixed at the lower end of the supporting rod (36), a dynamic loading mechanism (5) is arranged in the guide cylinder (4), and the dynamic loading mechanism (5) is connected with the coupling (41);
the testing rack (31) is provided with a transmission tooth holder (42), the center in the transmission tooth holder (42) is rotationally provided with a shaft sleeve (43), the testing rack (31) is provided with a motor (45), the output end of the motor (45) is in meshed transmission with the transmission tooth holder (42) through a gear, the shaft sleeve (43) is sleeved with a thread disc (44), the inner wall of the guide cylinder (4) is provided with a thread groove, and the thread disc (44) is in sliding connection with the guide cylinder (4) through a thread meshing effect;
the clamping plates (6) are two left and right distributed, a connecting bolt (61) is transversely connected in series between the two clamping plates (6), a lock nut is arranged on the connecting bolt (61), a pull shaft (62) is fixed on the clamping plates (6), one end of the pull shaft (62) is connected to the other clamping plate (6) in a sliding and penetrating mode, and the pull shaft (62) positions a material test through a positioning hole groove on the end face of a material sample;
the positioning hole grooves are arranged as vertical strip-shaped holes, contact pins (63) are horizontally embedded in the clamping plates (6), and the contact pins (63) are slidably arranged in the clamping plates (6) through inner springs and are contacted with the surfaces of the material samples; and a displacement sensor is also arranged on the clamping plate (6).
2. The electrochemical hydrogen embrittlement detection device based on the electrochemical hydrogen charging test according to claim 1, characterized in that the dynamic loading mechanism (5) comprises: fixed cover (51), coaxial fixed is in leading jar (4), the one end sliding connection of shaft coupling (41) is in fixed cover (51), fixed cover (51) internal rotation is provided with linkage pipe (52), linkage pipe (52) with the one end of shaft coupling (41) rotates the cup joint mutually, it is provided with drive shaft (53) to rotate on fixed cover (51), drive shaft (53) with linkage pipe (52) are fixed mutually to rotary drive linkage pipe (52), be fixed with pin (54) perpendicularly on shaft coupling (41) lateral wall, interior guide slot (55) have been seted up on linkage pipe (52), pin (54) sliding connection is in interior guide slot (55).
3. The electrochemical hydrogen embrittlement detection device according to claim 2, characterized in that the inner guide groove (55) is constructed in a multi-stage structure, and the slope of each stage of groove hole is different;
the drive shaft (53) is capable of forward and reverse pulse rotation.
4. A method for detecting hydrogen embrittlement of a material based on an electrochemical hydrogen charging test, which adopts the device for detecting hydrogen embrittlement of a material based on an electrochemical hydrogen charging test according to any one of claims 1 to 3, characterized by comprising the steps of:
the stretching mechanism (3) provides pulse tensile stress to detect a material test, wherein before the material sample is subjected to hydrogen embrittlement detection, the material property, the processing technology and the microstructure of the material sample are evaluated, simultaneously, the characterization characteristics of the material sample are combined, hydrogen embrittlement performance reference data corresponding to the material sample are indexed and called according to the obtained characterization data and the material characteristics, the test environment characteristic factors of the material sample are indexed based on the reference data, at the moment, the stretching mechanism (3) adjusts the stretching strength, simultaneously, the hydrogen passing amount of the hydrogen storage tank (22) is controlled, and the test temperature is adjusted by the liquid change temperature controller (12).
5. The method for detecting hydrogen embrittlement of material based on electrochemical hydrogen charging test according to claim 4, characterized in that a control module is arranged on the stretching mechanism (3), the control module is connected with a peripheral control system, wherein the peripheral control system constructs a training model according to a hydrogen embrittlement performance reference data set of the material sample, the training model scores importance of the characteristics of the property, the processing technology, the microstructure and the characterization characteristic of the material sample, and recommended characteristics are determined according to the importance scores;
model training is carried out on the reference data set based on recommended features, and a plurality of candidate regression models are obtained;
obtaining model scores of the candidate regression models based on a preset model evaluation method, and determining a recommended regression model; repeating data training on the recommended regression model, and detecting the accuracy of the model through a test set in the reference data set;
and defining and minimizing a loss function, and adjusting and optimizing the built regression model.
6. The method for detecting hydrogen embrittlement of material based on electrochemical hydrogen charging test according to claim 5, wherein after the material sample passes through a contact pin (63) in the stretching mechanism (3) and a displacement sensor to obtain characterization characteristic data, a regression model outputs a test environment characteristic factor target value of the material sample, and a dynamic loading mechanism (5) in the stretching mechanism (3) performs dynamic loading strength adjustment based on the output target value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410174647.XA CN117723608B (en) | 2024-02-07 | 2024-02-07 | Material hydrogen embrittlement detection device and method based on electrochemical hydrogen charging test |
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| CN202410174647.XA CN117723608B (en) | 2024-02-07 | 2024-02-07 | Material hydrogen embrittlement detection device and method based on electrochemical hydrogen charging test |
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| CN117723608A true CN117723608A (en) | 2024-03-19 |
| CN117723608B CN117723608B (en) | 2024-05-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300874A (en) * | 2015-09-11 | 2016-02-03 | 中国民航大学 | Stress corrosion and hydrogen measuring electrochemical in-situ measurement device under slow strain speed condition |
| CN106442136A (en) * | 2016-10-18 | 2017-02-22 | 北京科技大学 | Device for testing stress corrosion behavior of metal material under fluid high pressure |
| CN108489802A (en) * | 2018-03-29 | 2018-09-04 | 武汉钢铁有限公司 | The device and method of metal material hydrogen embrittlement energy is detected under the conditions of dynamic bending |
| CN115389323A (en) * | 2022-09-02 | 2022-11-25 | 中国计量大学 | Electrochemical hydrogen charging slow strain rate in-situ stretching device |
| CN116642753A (en) * | 2023-05-29 | 2023-08-25 | 金华高等研究院(金华理工学院筹建工作领导小组办公室) | Hydrogen embrittlement sensitivity testing device and method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300874A (en) * | 2015-09-11 | 2016-02-03 | 中国民航大学 | Stress corrosion and hydrogen measuring electrochemical in-situ measurement device under slow strain speed condition |
| CN106442136A (en) * | 2016-10-18 | 2017-02-22 | 北京科技大学 | Device for testing stress corrosion behavior of metal material under fluid high pressure |
| CN108489802A (en) * | 2018-03-29 | 2018-09-04 | 武汉钢铁有限公司 | The device and method of metal material hydrogen embrittlement energy is detected under the conditions of dynamic bending |
| CN115389323A (en) * | 2022-09-02 | 2022-11-25 | 中国计量大学 | Electrochemical hydrogen charging slow strain rate in-situ stretching device |
| CN116642753A (en) * | 2023-05-29 | 2023-08-25 | 金华高等研究院(金华理工学院筹建工作领导小组办公室) | Hydrogen embrittlement sensitivity testing device and method |
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