33 results about "Hydrogen damage" patented technology

The invention relates to the technical field of pipeline safety, and discloses a hydrogen-doped pipeline hydrogen damage grading evaluation method based on fracture mechanics. Comprising the following steps: acquiring initial pipeline state data by establishing a hydrogen-doped pipeline digital twin model; then introducing a hydrogen concentration dependency term to correct the J integral expression, and performing stress analysis based on the J integral expression; generating a material toughness attenuation curve based on a stress analysis result; hydrogen diffusion and accumulation rate parameters are obtained based on a material toughness attenuation curve; predicting a damage development track in combination with real-time operation data; establishing a grading standard system of dynamic response based on the model for risk assessment; and finally, real-time monitoring and scientific grading of the hydrogen damage of the hydrogen-doped pipeline are realized. According to the invention, comprehensive dynamic evaluation of hydrogen damage of the hydrogen-doped pipeline is realized, and scientific decision support is provided for safe operation of the pipeline.

The present application relates to a kind of high-entropy alloy coating for hydrogen blocking and preparation method thereof, belong to and hydrogen pipeline hydrogen damage prevention technical field.The high-entropy alloy coating includes Al, Fe, Cr, Mo, Ti and Pd, and the mass ratio of the total mass of Al, Fe, Cr, Mo and Ti to the mass of Pd is 1-x:x, wherein, 0≤x≤1.The high-entropy alloy target material is obtained by virtue of electric arc smelting advantage, and the high-entropy alloy coating is obtained on the surface of pretreated substrate by magnetron sputtering.The corrosion resistance of high-entropy alloy, the good hydrogen blocking characteristics of alloy formed by Al, Fe, Cr and other elements, and the advantages of Pd in hydrogen storage are perfectly combined to further improve the hydrogen blocking performance of the coating.The high-entropy alloy coating prepared by the method is controllable in composition and performance, and the coating has strong adhesion to the substrate, thereby achieving good hydrogen blocking effect, and the coating prepared by the process is controllable in thickness, which is convenient for performance regulation and testing.

The application discloses an ultralow-temperature steel and a heat treatment process and application thereof, and relates to the technical field of ultralow-temperature steel. ‑2 The ultralow-temperature steel comprises the following components in percentage by mass: C: 0.41% to 0.45%, Mn: 23.5% to 24.5%, Cr: 3.5% to 3.7%, Cu: 0.35% to 0.45%, Ni: 0.55% to 0.65%, V: 0.20% to 0.24%, Mo: 0.20% to 0.24%, Si: 0.15% to 0.25%, Al: 0.02% to 0.04%, and the balance of Fe and inevitable impurities; the ultralow-temperature steel is full austenite structure, and the stacking fault energy of the ultralow-temperature steel is 18 to 21 mJ·m ‑2 at-269 DEG C. The ultralow-temperature steel has multiple properties of excellent ultralow-temperature resistance, corrosion resistance and hydrogen damage resistance through the specific heat treatment process and the component composition, can be applied to the storage and transportation of ultralow-temperature medium such as liquefied natural gas and liquid hydrogen, and is suitable for complex environments such as land, sea and aviation.

The application relates to the technical field of steel production, in particular to a hydrogen embrittlement resistant pipeline steel and a preparation method and application thereof. The metallographic structure of the pipeline steel comprises a tempered sorbite structure and nano precipitate particles; the tempered sorbite structure comprises a ferrite matrix and carbide; the grain size of the ferrite is greater than or equal to 10 levels, and the volume fraction of the carbide is less than or equal to 10%; the diameter of the nano precipitate particles is less than or equal to 20 nm. The application solves the technical problem that the existing pipeline steel is prone to hydrogen damage in a high-pressure hydrogen environment, avoids the contradiction between high strength and hydrogen embrittlement resistance, and makes the hydrogen conveying pipeline steel have high strength, high toughness, low hardness and excellent hydrogen embrittlement resistance, so that the hydrogen conveying pipeline steel can meet the use requirements of high-pressure (greater than or equal to 10 MPa) hydrogen conveying.

This invention discloses a rapid assessment method for hydrogen damage in ultra-long-life structures under alternating loads, relating to the field of materials performance evaluation. The method includes the following steps: S1: Analyzing the service conditions of typical ultra-long-life structures and key components to determine the service environment of key component materials; S2: Conducting ultra-high cycle fatigue tests under different stress ratios to obtain stress-life data for different lifespans; S3: Observing the fracture morphology of high-cycle fatigue and ultra-high cycle fatigue samples using scanning electron microscopy; S4: Performing hydrogen element detection to obtain the hydrogen content distribution around micro-defects; S5: Using the Basquin formula, piecewise linearly fitting the S-N data for the high-cycle fatigue and ultra-high cycle fatigue stages to obtain the slopes of two fitted lines; S6: Using the ratio of the slopes of the two fitted lines as the hydrogen damage factor. The method disclosed in this invention can achieve rapid assessment of hydrogen damage in long-life structures under alternating loads while ensuring the reliability of the assessment results.

The present invention provides a method for preparing a high-strength, hydrogen-damage-resistant medium-entropy alloy, a medium-entropy alloy, and its application, belonging to the technical field of metal alloy materials. The method comprises the following steps: 1) weighing Cr, Co, Ni, Mo, and W by atomic percentage, uniformly mixing, smelting, and casting to obtain an alloy ingot A; 2) subjecting the alloy ingot A described in step 1) to a high-temperature solution heat treatment to obtain an alloy ingot B; 3) rolling the alloy ingot B described in step 2) to obtain a rolled sample; and 4) subjecting the rolled sample described in step 3) to a recrystallization heat treatment to obtain a medium-entropy alloy. The method of the present invention, which utilizes W and Mo alloying to optimize the yield strength and hydrogen embrittlement resistance of a Cr-Co-Ni-based medium-entropy alloy, has the advantages of a wide composition range and an easy-to-operate preparation method. The prepared Cr-Co-Ni-W-Mo-based medium-entropy alloy has high strength and excellent resistance to high-pressure hydrogen damage.

The application discloses a hydrogen-doped natural gas transportation safety risk assessment method and system, relates to the technical field of hydrogen-doped natural gas pipeline safety monitoring, and comprises the following steps: initializing a safety situation assessment engine and injecting gas components; collecting pipeline strain vibration through a distributed optical fiber sensor, identifying low-frequency noise characteristics caused by hydrogen-induced material changes; superimposing and reconstructing in combination with historical corrosion crack maps to generate a mixed risk map and divide risk sections; calculating the combustible migration rate of mixed gas and the cumulative fatigue reduction coefficient of the pipeline wall material in each risk section; and quantifying risk entropy values by comprehensively considering both, thereby generating a differentiated maintenance strategy. The method can realize early identification of hydrogen damage to pipeline materials in a hydrogen-doped environment, and realizes accurate positioning and assessment of risks by fusing historical defect information, thereby providing technical support for active safety maintenance of the pipeline.

This invention discloses a system and method for monitoring the hydrogen damage state of metals, comprising: a hydrogen charging device for electrochemically charging a plate-shaped sample of the same metal as the target metal that has not undergone hydrogen damage; a hydrogen permeation measuring device for converting hydrogen atoms permeating into the sample into hydrogen ions during the hydrogen charging process and measuring the current generated by the free electrons produced during the conversion process in real time to obtain a hydrogen permeation curve; and an ultrasonic measuring device for emitting ultrasonic guided waves to the sample during the hydrogen charging process and receiving the nonlinear response signal generated by the guided waves exciting ultrasonic waves inside the sample, and then performing cepstral analysis on the received signal to obtain the nonlinear coefficients at different time periods. Based on this, combined with the hydrogen permeation curve, the correlation between the nonlinear response signal and the degree of hydrogen damage is determined, and then the nonlinear response signal of the target metal is substituted into the correlation to obtain the hydrogen damage state inside the metal. This invention can monitor and evaluate the degree of hydrogen damage inside metals in real time.

The present application relates to the technical field of pipeline safety, and discloses a hydrogen-doped pipeline hydrogen damage grading evaluation method based on fracture mechanics; comprising: obtaining initial pipeline state data by establishing a hydrogen-doped pipeline digital twin model; then introducing a hydrogen concentration dependent item to correct the J integral expression, and performing stress analysis based thereon; generating a material toughness attenuation curve based on the stress analysis results; obtaining hydrogen diffusion and accumulation rate parameters based on the material toughness attenuation curve; and predicting damage development trajectories in combination with real-time operation data; performing risk assessment based on a dynamic response grading standard system; and finally realizing real-time monitoring and scientific grading of hydrogen damage of hydrogen-doped pipelines. The present application realizes comprehensive dynamic evaluation of hydrogen damage of hydrogen-doped pipelines, and provides scientific decision support for safe operation of pipelines.

A simulation method for failure behavior of a geological hydrogen storage well pipe string based on fracture and hydrogen diffusion theory, characterized in that: the mechanical behavior experiments of the geological hydrogen storage well pipe string in the presence or absence of hydrogen environment are carried out, the fracture strain, fracture energy, hydrogen concentration and distribution, hydrogen penetration depth and stress-strain constitutive relationship of the pipe string material under different hydrogen charging times are obtained; based on the test data, the VUSDFLD subroutine is developed to calculate the hydrogen coverage, wherein the hydrogen concentration distribution control module along the pipe string wall thickness direction, the static water stress accelerated hydrogen diffusion module and the result output module need to be constructed; a three-dimensional finite element mechanical model of the geological hydrogen storage well pipe string is established, the flexible damage and burst failure criterion is used to simulate the elastic-plastic deformation, crack propagation and burst mechanical behavior of the geological hydrogen storage well pipe string, the influence law of hydrogen distribution characteristics and stress accelerated hydrogen diffusion on the failure behavior of the pipe string is analyzed, and the hydrogen damage mechanism and ultimate bearing pressure prediction of the pipe string under the synergistic action of high internal pressure and hydrogen penetration are realized.

The invention discloses a hydrogen damage test device and a detection method thereof.The hydrogen damage test device comprises an electrolyte container, an electrochemical workstation, an acoustic emission probe, an acoustic emission detector and a computer, and a metal sample, an auxiliary electrode and electrolyte are arranged in the electrolyte container; the metal sample and the auxiliary electrode are soaked in the electrolyte and are both connected with the electrochemical workstation, the non-hydrogen-filling surface of the metal sample is provided with the acoustic emission probe, the other surfaces of the metal sample except the hydrogen filling surface are sealed through resin, the acoustic emission probe is connected with the acoustic emission detector, and the electrochemical workstation and the acoustic emission detector are both connected with the computer. According to the method, acoustic emission signals are collected in real time in the electrochemical hydrogen charging process, synchronous analysis is conducted in combination with parameters of the hydrogen charging process, elastic wave signals generated by a local damage event can be captured at the moment of hydrogen-induced microcrack initiation, and therefore real-time recognition of the hydrogen crack initiation moment is achieved; and the accuracy and reliability of hydrogen damage early recognition are improved.

The invention discloses a composite coating for a high-pressure hydrogen pipeline and a preparation method and application thereof, the composite coating comprises a hydrogen storage layer and a hydrogen blocking layer, the hydrogen blocking layer is coated on the hydrogen storage layer, the material of the hydrogen storage layer is an oxide material, and the material of the hydrogen blocking layer is an inorganic-organic mixed coating. In the technical scheme provided by the invention, firstly, laser peening strengthening is carried out on the surface of the matrix to refine crystal grains and reduce the hydrogen embrittlement sensitivity of the material, then, the oxide hydrogen storage layer is arranged to effectively absorb infiltrated hydrogen atoms, and finally, the hydrogen resistance layer made of an organic polymer and a two-dimensional material is arranged on the outermost layer to effectively absorb the hydrogen atoms. And external hydrogen atoms can be prevented from entering, and meanwhile the anti-corrosion function is achieved. The composite coating can be used for the inner surface of the hydrogen conveying pipeline, the risk of hydrogen damage of the pipeline is effectively reduced, the corrosion resistance is improved, and long-period stable operation of the high-pressure hydrogen pipeline is guaranteed.

The present application proposes a numerical analysis method for evaluating hydrogen damage of a pipeline containing defects based on a plastic damage model, comprising the following steps: step S1: performing an electrochemical hydrogen charging experiment and hydrogen permeation simulation on a sample to determine the hydrogen concentration distribution inside the pipeline; step S2: performing a uniaxial tensile experiment under electrochemical hydrogen charging to obtain a stress-strain curve of the pipeline steel affected by hydrogen embrittlement; step S3: establishing a uniaxial tensile numerical model and calibrating plastic damage parameters under different hydrogen concentrations; step S4: fitting the plastic damage parameters to obtain a correlation function between the hydrogen concentration and the plastic damage parameters; and step S5: hydrogen damage evaluation, obtaining a dangerous point with the highest hydrogen concentration inside the pipeline, substituting the hydrogen concentration of the point into the correlation function, calculating the plastic damage parameters of the dangerous point of the pipeline, and obtaining the stress-strain curve at this time; the present application can analyze the plastic damage of the pipeline steel affected by hydrogen by using the finite element method, and provides a theoretical basis for pipeline design, material selection and protection.

The invention relates to a high-entropy alloy coating for resisting hydrogen and a preparation method of the high-entropy alloy coating, and belongs to the technical field of hydrogen damage prevention of hydrogen conveying pipelines. The high-entropy alloy coating comprises Al, Fe, Cr, Mo, Ti and Pd, the ratio of the total mass of the Al, the Fe, the Cr, the Mo and the Ti to the mass of the Pd is 1-x: x, and x is larger than or equal to 0 and smaller than or equal to 1. According to the method, the high-entropy alloy target material is obtained by virtue of the advantage of electric arc melting, and the high-entropy alloy coating is obtained on the surface of the pretreated matrix through magnetron sputtering. The corrosion resistance of the high-entropy alloy, the good hydrogen resistance of the alloy formed by elements such as Al, Fe and Cr and the advantages of Pd in the hydrogen storage aspect are perfectly combined, so that the hydrogen resistance of the coating is further improved. The high-entropy alloy coating prepared through the method is controllable in component and performance, the binding force between the coating and a base body is high, and therefore the good hydrogen resistance effect is achieved, the thickness of the coating prepared through the technology is controllable, and the performance of the coating can be conveniently regulated, controlled and tested.

The embodiment of the invention provides a hydrogen damage assessment method, device and equipment for a circumferential weld of a high-steel-grade pipeline and a medium. The method comprises the following steps: firstly, determining hydrogen concentration data and stress data when hydrogen diffuses in a to-be-treated high-steel-grade pipeline circumferential weld, then determining a coupling relationship between hydrogen diffusion and stress according to the hydrogen concentration data, the stress data and a preset damage coupling model, and finally, determining the stress of the to-be-treated high-steel-grade pipeline circumferential weld on the basis of the coupling relationship. And evaluating the hydrogen damage of the circumferential weld of the high-steel-grade pipeline to be treated by adopting a finite element method, and determining damage information. According to the method, safety evaluation of the pipeline circumferential weld in the absence of hydrogen environment in the prior art is considered, the damage coupling model corresponding to the fracture damage constitutive of the high-steel-grade pipeline circumferential weld in the hydrogen environment considering coupling of the hydrogen medium and the complex stress state is established, and hydrogen diffusion and stress of the circumferential weld can be analyzed; and in combination with a finite element user dynamic subprogram, programming of the hydrogen damage constitutive is realized, and support is provided for accurately evaluating hydrogen damage information of the circumferential weld.

A method for determining the hydrogen damage state of materials based on online ultrasonic monitoring includes establishing a hydrogen damage state prediction model and real-time monitoring of the hydrogen damage state of the test sample based on the prediction model. Establishing the hydrogen damage state prediction model involves first conducting a hydrogen charging test on a calibrated sample, plotting a calibration curve of the relative nonlinear optimal estimation coefficient versus hydrogen charging time, and a reference curve of the nth derivative of the calibration curve. Then, the relationship between hydrogen charging time and hydrogen damage state is determined, and a hydrogen damage state prediction model based on the change of the relative nonlinear optimal estimation coefficient is established. Real-time monitoring of the hydrogen damage state of the test sample includes real-time acquisition of the nonlinear ultrasonic signal of the test sample, processing it to obtain a real-time curve of the relative nonlinear optimal estimation coefficient of the test sample, and determining the hydrogen damage state of the test sample based on the above prediction model. This method can conveniently, quickly, accurately, and intuitively measure hydrogen damage in materials.

The invention discloses a hydrogen energy equipment hydrogen loss detection system and method based on a customized ultrasonic signal, and the system comprises an ultrasonic signal generator which generates a customized ultrasonic signal according to the acoustic impedance characteristic of a material, and achieves the differential recognition of hydrogen-induced microcracks of a carbon fiber and a metal liner through time-frequency domain joint modulation and optimization; the ultrasonic signal detector is used for receiving reflection, transmission and scattering signals by adopting a multi-mode probe array so as to realize accurate positioning and detection of hydrogen damage of different parts; the dynamic analysis module integrates a machine learning algorithm to process signal characteristics and outputs a damage evaluation result; the method comprises the steps of generating and transmitting a customized ultrasonic signal to equipment, receiving a response signal, performing noise reduction and feature extraction, identifying a hydrogen damage state based on multi-source signal fusion and feature database matching, visually displaying a result and providing maintenance decision support. Through combination of customized signals, multi-modal detection and intelligent analysis, the detection efficiency and reliability are remarkably improved, and the method is used for safety maintenance of hydrogen energy equipment.

This invention provides a hydrogen pipeline damage state detection system and method based on nonlinear ultrasound. The system's nonlinear ultrasonic detection device includes a signal excitation module and a waveform receiving module. The signal excitation module uses pulsed ultrasonic signals to ultrasonically excite the test sample, achieving non-contact ultrasonic propagation to acquire the vibration signal of the detection response. The waveform receiving module analyzes the nonlinear response waveform information. The feature parameter calculation module is configured to calculate state feature parameters based on the nonlinear response waveform information. The evaluation matrix formulation module establishes hydrogen damage identification criteria based on the correlation between state feature parameters and hydrogen damage status. Furthermore, the hydrogen damage assessment module comprehensively evaluates and provides early warning of the pipeline's hydrogen damage status based on the hydrogen damage identification matrix combined with the state feature parameters of the detection response. This approach overcomes the limitations of existing technologies in terms of application scenarios and accuracy, providing a comprehensive and reliable evaluation of hydrogen damage status.

The invention provides an optimized hydrogen elimination processing method and system for a long-term service hydrogen transmission pipeline, and the method comprises the steps: selecting a hydrogen transmission pipeline of which the service time meets a set condition as an alternative pipeline with a judgment requirement, and judging a target pipeline object needing to be processed; according to the diameter of the pipeline, determining heating band parameters required by heating hydrogen elimination treatment, and arranging a heating band on the pipeline according to the heating band parameters; in the shutdown state, after the pipeline is cleaned, hardness detection and metallographic detection are conducted, and matched heating temperature and time are selected from a preset hydrogen elimination parameter database based on the detection result; and heating and hydrogen eliminating treatment is conducted on the target pipeline object. By the adoption of the scheme, the problem that energy consumption of an existing process is too large can be solved, a heat treatment dehydrogenation treatment time and temperature database is built, long-term service pipeline dehydrogenation is achieved based on high-quality parameters, and therefore the safety of a long-term service hydrogen conveying pipeline is guaranteed, and safety accidents caused by hydrogen damage are avoided.

The utility model belongs to the field of PEM electrolytic water hydrogen production, specifically relates to square box type hydrogen harm treatment device, including box body, and opposite setting on the box body for making the suction module of convection inside and outside the box body, the inside of box body is sequentially provided with the filter portion for filtering air, catalytic portion for catalyzing hydrogen gas and guide portion for collecting catalytic reaction substance along its convection direction, the utility model discloses the cooperation of filter portion and catalytic portion of setting in the inside of hydrogen production machine and along its convection direction in succession, so that when hydrogen leakage occurs inside hydrogen production equipment, the hydrogen gas of suction can be generated water through the filter portion and catalytic portion in the box body and catalytic oxidation reaction, thereby consuming hydrogen and preventing the possibility of hydrogen leakage.

The invention discloses a method and a related device for quickly judging hydrogen damage of a water-cooled wall tube on site. The method comprises the following steps: acquiring basic information of a boiler and the water-cooled wall tube to be judged; obtaining appearance feature information of the water-cooled wall tube to be judged; acquiring a field inspection result of the failure part of the water-cooled wall tube to be judged; according to the basic information of the boiler to be judged, the basic information of the water-cooled wall tube to be judged, the appearance feature information of the water-cooled wall tube to be judged and the field measurement result, matching a strong association rule of failure feature-failure property-overhaul suggestion so as to judge whether the water-cooled wall tube to be analyzed has hydrogen damage or not; the method and the related device can be used for judging whether the water-cooled wall tube has hydrogen damage or not on site, and are time-saving, labor-saving and low in cost.

The present application belongs to the technical field of hypersonic test equipment, and discloses a method for nondestructive prediction of hydrogen damage of a shock tube. The method comprises the following steps: setting two monitoring sections; respectively performing original control group detection on the two monitoring sections; installing the two monitoring sections; performing influence detection of a shock tunnel test; performing comparative analysis; making a decision; and performing comprehensive inspection of the shock tube. The method can predict and evaluate the hydrogen damage risk without damaging the shock tube body, and provides a reliable basis and guidance for comprehensive and detailed inspection and service risk assessment of the high-pressure and high-temperature hydrogen-driven shock tunnel.

The invention belongs to the technical field of steel and iron materials and preparation thereof, and discloses a high-toughness steel plate for liquid hydrogen storage and transportation and a preparation method thereof. And the mass percentage of each chemical component is controlled and a film-shaped inverted austenite formation tendency index is met. A tempered martensite and film-shaped inverted austenite dual-phase structure is obtained through reasonable component proportion and cooperative control over high-cleanliness smelting, continuous casting, rolling and heat treatment, the volume fraction of the film-shaped inverted austenite is 8%-20%, and the volume fraction of blocky or island-shaped inverted austenite is not larger than 3%. The steel plate has the room-temperature yield strength larger than or equal to 600 MPa, the tensile strength larger than or equal to 750 MPa and the impact energy larger than or equal to 70 J at the temperature of-253 DEG C within the thickness range of 6-50 mm, the structure and performance in the thickness direction are uniform, high strength, ultralow-temperature high toughness and excellent hydrogen damage resistance are achieved, and the steel plate is suitable for liquid hydrogen storage tanks and related low-temperature pressure containers.

The application discloses a safety guarantee system, method and transfer device of a hydrogen-containing storage gas reservoir, and belongs to the technical field of installation guarantee of the hydrogen-containing storage gas reservoir. The safety guarantee system comprises a first monitoring subsystem and a transfer device. The hydrogen-containing storage gas reservoir comprises a first storage gas layer and a second storage gas layer. The first monitoring subsystem is arranged in the first storage gas layer and a system unit thereof. The first storage gas layer is connected with one or more second storage gas layers through the transfer device. The first storage gas layer is detected through the first monitoring subsystem, and the stratification of the first storage gas layer is obtained. If the local hydrogen aggregation concentration reaches or is higher than a first threshold value, the hydrogen-containing fuel is transferred from the first storage gas layer to the second storage gas layer through the transfer device. The fluid flow disturbance in the transfer process breaks the balance state of the first storage gas layer and the second storage gas layer, so that the concentration is redistributed, and hydrogen damage caused by possible stratification of the hydrogen-containing fuel is avoided. The safety guarantee system has low cost and high operability.

The application discloses a method for reducing hydrogen damage of an advanced high-strength steel laser welding joint by in-situ post-weld heat treatment, and the method comprises the following steps: constructing a database of the relationship among the plate thickness, the welding temperature, the laser spot diameter and the process parameters, and realizing efficient and low-cost in-situ post-weld heat treatment of the welding seam area and the heat affected zone by a single-beam laser, so that the carbonides are in-situ precipitated in the welding seam area and the heat affected zone of the advanced high-strength steel laser welding joint, the hydrogen atoms in the internal regions of the joint are pinned by the appropriate precipitation of the carbonides, the hydrogen diffusion capacity in each micro-zone of the high-strength steel laser welding joint is reduced, and the purpose of reducing the hydrogen damage of the advanced high-strength steel laser welding joint is achieved.

Disclosed in the present invention are a vanadium-containing high manganese steel, and a preparation method therefor and the use thereof. By combining chemical components with a controlled rolling process, the steel exhibits an excellent ultra‑low‑temperature resistance and a strong resistance to hydrogen damage, while avoiding the addition of multiple precious metal elements and simplifying the process. The present application has wide application prospects and is more suitable for manufacturing storage and transport containers for ultra-low temperature media in complex environments.

The application provides a method and device for determining hydrogen damage sensitivity of a material and a storage medium, and relates to the field of material science and engineering. The method comprises: obtaining a first parameter value of a first parameter of a target material under a target hydrogen partial pressure environment; wherein the first parameter is used to measure the hydrogen diffusion of the target material under the target hydrogen partial pressure environment; determining a second parameter value of a second parameter of the target material based on the first parameter value; wherein the second parameter is used to measure the fracture toughness of the target material under hydrogen damage caused by hydrogen diffusion; and determining the hydrogen damage sensitivity of the target material based on the first parameter value and the second parameter value. The method combines the hydrogen diffusion parameter of the reaction microscopic hydrogen transport mechanism and the fracture toughness parameter of the reaction macroscopic mechanical property, and realizes multi-dimensional evaluation of the hydrogen damage sensitivity.

The invention relates to the field of hydrogen damage evaluation of a high-pressure hydrogen refueling station hydrogen-present material, in particular to a hydrogen damage acceleration evaluation method for a high-pressure hydrogen refueling station hydrogen-present component material. According to the method, the accelerated evaluation of the high-pressure hydrogen-related component material in the hydrogen refueling station is realized through the methods of hydrogen service condition analysis, hydrogen permeation experiment, hydrogen content theoretical prediction, hydrogen damage evaluation sample preparation, accelerated introduction of equivalent hydrogen and hydrogen damage evaluation. Based on a high-pressure gas-phase thermal hydrogen charging device and an environment hydrogen device, the characteristics that hydrogen is introduced in an accelerated mode through high-pressure gas-phase thermal hydrogen charging and the environment hydrogen device is closer to service working condition evaluation are utilized, and accelerated evaluation of the hydrogen damage behavior of the material under the near working condition is achieved through numerical simulation calculation, temperature and pressure combined regulation and control and tensile tests in different environments. And a rapid and reliable hydrogen damage evaluation method is provided for part materials serving in a high-pressure hydrogen environment in the fields of hydrogen energy and the like.

This invention discloses a method, system, medium, and device for predicting the degree of hydrogen damage in steel, relating to the field of metal material damage detection technology. The method includes: constructing an experimental dataset of ultrasonic hydrogen damage in high-strength steel; constructing a numerical mechanism model of hydrogen damage and a numerical mechanism model of ultrasonic wave transmission to generate a simulation dataset of ultrasonic physics for hydrogen damage in high-strength steel; performing continuous wavelet transform on the experimental and simulation datasets to determine the corresponding time-frequency features, and constructing a feature alignment network based on an attention mechanism to fuse the time-frequency features and determine a hybrid feature vector; constructing and training a physical information neural network (PINN) with dual-channel input to obtain a prediction model for predicting the degree of hydrogen damage in steel.

The invention relates to the field of determination of hydrogen permeability coefficients of additive manufacturing austenite materials under high-pressure hydrogen working conditions, in particular to a determination method for determining the hydrogen permeability coefficient of additive manufacturing austenite alloy through porosity. According to the characteristic that the additive manufacturing austenite alloy is low in hydrogen diffusion coefficient, on the basis of an existing hydrogen diffusion and hydrogen permeability coefficient formula, according to the characteristics of an additive manufacturing material, a porosity influence coefficient is introduced, and a hydrogen diffusion and hydrogen permeability coefficient formula suitable for the additive manufacturing austenite alloy is constructed; the hydrogen diffusion and hydrogen permeability coefficients of traditional manufacturing materials are inquired and substituted into the corrected formula, and rapid determination of the hydrogen diffusion and hydrogen permeability coefficients of the additive manufacturing austenite alloy is achieved. According to the method, rapid determination of the hydrogen permeability coefficient of the additive manufacturing austenite material is achieved, and a foundation is laid for application of the additive manufacturing austenite material in the hydrogen related field and hydrogen damage evaluation of the additive manufacturing austenite material.