928results about "Material analysis using radiation diffraction" patented technology

The invention discloses a nut defect detection method based on X-ray imaging, and particularly relates to the field of X-ray nut material internal defect imaging, which comprises the following steps: generating and adjusting an initial light beam of X-rays through a synchronous radiation source, and constructing uniform irradiation field data for nut material detection; acquiring angle scattering light intensity matrix data based on the uniform irradiation field data; and performing phase inversion and sparse constraint optimization on the angle scattering light intensity matrix data to generate electron cloud density optimization distribution data, and constructing density connectivity relation graph data based on the electron cloud density optimization distribution data. By introducing a detection principle of combining high-coherence X-ray scattering imaging based on a synchronous radiation source and electron cloud density disturbance analysis, lossless identification of an early microcosmic physical deterioration region in a nut is realized; the problem that an existing method based on absorption imaging is insufficient in defect detection capacity under the background of weak density gradient and homogeneous component is solved.

The invention provides a multi-dimensional adsorbent performance evaluation method, and belongs to the technical field of performance evaluation, and the method comprises the following steps: carrying out a first test on an adsorbent, recording the mass change of the adsorbent after each cycle, and evaluating the adsorption performance of the adsorbent to obtain a first test result; and carrying out a second test on the adsorbent to determine the anti-sintering capability and the cycling stability of the adsorbent so as to obtain a second test result. Microscopic form change, influence condition and crystal structure of the adsorbent before and after the test are observed, and microscopic characterization of the adsorbent is obtained. And performing multi-scale simulation on the adsorbent according to the microscopic representation, and performing life cycle evaluation on the adsorbent by using a simulation result to obtain a life cycle evaluation result. And an optimization direction is provided for comprehensive performance evaluation of the adsorbent. The invention aims to realize an efficient and low-cost carbon capture technology and promote effective utilization of solid waste resources, and provides a systematic evaluation method to promote the development of the carbon capture technology.

The invention relates to the technical field of material detection, and discloses a material multi-modal X-ray foreign matter detection method, which comprises the following steps of: acquiring a transmission gray-scale time sequence array and a scattered photon energy spectrum distribution matrix output by a multi-modal X-ray acquisition system, generating a composite characteristic body through cross-modal characteristic interactive coding, constructing a material-contour associated nodal topology network, and obtaining a material-contour associated nodal topology network; simulating a foreign matter feature conduction path and outputting a correlation confidence value set, performing space-time dimension mapping transformation to generate a foreign matter-detection coupling prediction curved surface, calculating a sensitivity adjustment factor and generating a standardized coupling coefficient thermodynamic cloud chart, extracting a detection quantitative index set and dynamically matching the detection quantitative index set with a preset reference range; and when the indexes exceed the boundaries, generating a regulation and control scheme. According to the method, the accuracy, reliability and real-time performance of foreign matter detection are improved, and the detection requirements of complex scenes can be met.

The invention relates to the technical field of analysis and detection, in particular to a micro-area distribution detection method for micro and / or trace component elements in nickel-based single crystal superalloy. According to the method, the conventional common element distribution detection means (EPMA, EDS, TOF-SIMS, TEM and EELS) are combined, the detection limit and the detection advantages are referred, different devices are reasonably utilized by analyzing different phase structure characteristics, quantitative or semi-quantitative element micro-area distribution analysis is quickly and effectively realized, the use requirements on high-precision devices are reduced, and the method is suitable for large-scale popularization and application. And the cost and the test difficulty are greatly reduced.

The invention provides a space measurement and analysis method and system for a neutron diffraction rocking curve of a single crystal material, and the method comprises the steps: S1, building a laboratory coordinate system and a sample coordinate system, and setting a test point grid; s2, collecting a two-dimensional diffraction image of each test point to obtain angle information of the test point; s3, integrating the angle information of the test points based on the test point grid, and preprocessing the two-dimensional diffraction image; s4, extracting key structure parameters of each test point based on the preprocessed two-dimensional diffraction image; s5, constructing a stress field according to the key structure parameters; and S6, constructing a distribution map of crystal internal lattice parameters in a three-dimensional space according to the stress field. The method provided by the invention effectively improves the capability of identifying the non-uniformity and local distortion of the crystal structure, can be widely applied to the fields of residual stress evaluation, defect evolution monitoring, material quality control and the like, and has a remarkable engineering application value.

A method of determining optical property of a structure, comprising: obtaining first scattering data, the first scattering data relating to an illumination of the multi-layer structure with illumination radiation in a first polarization state and subsequently capturing radiation scattered from the multi-layer structure; reconstructing one or more first synthetic images of the multi-layer structure using the first scattering data, each of the one or more first synthetic images comprising amplitude and phase information of the radiation scattered from the multi-layer structure; and determining the optical property of the multi-layer structure using the one or more first synthetic images, wherein the optical property comprise complex refractive indices of one or more of the at least two layers of the multi-layer structure, and / or relative heights formed between the at least two layers of the multi-layer structure.

A micron-sized speckle preparation method for quasi-in-situ OIM-DIC mesoscopic strain field analysis comprises the following steps: (1) polishing the surface of a sample to be detected to obtain a bright and scratch-free mirror surface; (2) preparing Si powder turbid liquid; (3) dipping speckles of a sample to be detected in the Si powder turbid liquid to obtain micron-sized speckles; and (4) observing and shooting speckle morphology, and if Si particles are uniformly distributed and dispersed, applying the Si particles to quasi-in-situ OIM-DIC mesoscopic strain field analysis. The method is simple, convenient and rapid, low in operation and construction cost, high in practicability, good in particle dispersity, high in precision, more suitable for calculation of a quasi-in-situ OIM-DIC mesoscopic strain field, controllable in preparation process, low in cost and free of damage to the surface of a sample, the definition and stability of speckle characteristics are remarkably improved, DIC mesoscopic micron-scale operation under a quasi-in-situ OIM mechanical test can be effectively achieved, and the method is suitable for large-scale industrial production. And the grain and mesoscopic strain field information is successfully coupled.

The invention relates to the technical field of mineral exploration, and discloses a method for determining a heat source center of a gold and copper ore area containing alunite minerals, which comprises the following steps of: determining a to-be-detected area of a target mining area, sampling surface rocks according to a preset grid or section, and acquiring a plurality of rock samples and corresponding original acquisition points; carrying out mineral component analysis on the plurality of rock samples, screening the alunite-containing samples to obtain a plurality of alunite-containing samples, and screening effective samples; performing elemental component analysis on the effective sample, and extracting elements and contents related to gold mineralization or copper mineralization in the effective sample; setting a potential heat source center, calculating the distance between each effective sample and the potential heat source center, introducing a distance attenuation index, establishing an objective function of the element content and the distance, and adopting a gradient descent method to perform inversion solution by minimizing the objective function to obtain coordinates of the potential heat source center, namely the determined heat source center of the gold ore or the copper ore; the method improves the accuracy of gold and copper ore area heat source center exploration.

The invention discloses a multi-scale performance evaluation and optimization method and device for well cementation cement stone, and relates to the technical field of oil exploitation, the well cementation cement stone is subjected to nanoindentation test and scanning electron microscope microstructure test, and a mechanical property-microstructure test result is obtained; performing electronic computer tomography and mercury injection test on the well cementation cement stone, and constructing a pore network three-dimensional model; performing triaxial mechanical property test, thermogravimetric analysis and thermal expansion test on the well cementation cement stone to obtain a thermal-mechanical coupling test result; performing X-ray diffraction and X-ray fluorescence spectrum analysis on the well cementation cement stone to obtain mineral phase information and element information of the cement stone; according to the method, a mechanical property-microstructure test result, topological parameters, a thermal-mechanical coupling test result, cement stone mineral phase information and element information are fused, an optimal design scheme for target well conditions is generated, multi-dimensional performance testing and characterization are achieved, and an accurate basis is provided for well cementation cement stone optimal design and quality control.

The invention relates to a multi-principal element alloy local lattice distortion measurement method based on a synchrotron radiation X-ray atom pair distribution function, which comprises the following steps: preparing an experimental material, and collecting two-dimensional diffraction data by using synchrotron radiation high-energy X-rays; separating local and average structure information through an atom pair distribution function; and verifying local distortion causes by combining structure fitting and DFT supercell relaxation. According to the method, the accuracy of capturing the local distortion of the atomic scale can be improved, the integrity of statistical information of the local structure distortion of the quantitative characterization material can be fully supplemented, and high-precision measurement and quantitative analysis of dynamic distortion can be systematically realized.

The invention belongs to the technical field of vanadium enrichment mechanisms of phosphorus vanadium ores, and discloses a research method of a vanadium enrichment mechanism in a diagenetic stage of phosphorus vanadium ores, which comprises the following steps: S1, sample collection and treatment; s2, rock ore identification and mineral composition analysis; s3, analyzing the occurrence state and microcell morphology of vanadium; s4, performing geochemical analysis on the whole rock; s5, in-situ microcell geochemical analysis is carried out; s6, phosphorus nodule analysis; s7, comprehensive analysis and mineralization model establishment; according to the method, mineralogy, total rock geochemistry, micro-area surface scanning and other multi-scale and multi-means research methods are comprehensively utilized, and the vanadium occurrence state, the ore-forming fluid evolution and the phosphorus-vanadium coupling relation are finely described; in-situ microcell geochemical analysis is introduced into phosphorus nodule analysis, the internal structure, the growth sequence and element distribution of the phosphorus nodule are directly revealed, obvious frontier and systematicness are achieved, and reliable theoretical support is provided for accurate exploration of vanadium ore resources and green and efficient dressing and smelting process research and development.

The invention relates to the technical field of material testing, and discloses a phase change temperature calibration method and system for a phase change material, and the method comprises the steps: collecting the surface temperature distribution data and crystal structure parameters of the phase change material based on a bimodal synchronous monitor, and building a temperature-structure incidence matrix; when the parameters of the crystal structure suddenly change, determining surface temperature distribution data corresponding to a sudden change moment based on the temperature-structure incidence matrix, and calculating an initial phase change temperature interval; constructing a nonlinear mapping model of the initial phase-change temperature interval and the heating rate, and performing dynamic compensation on the initial phase-change temperature interval based on the nonlinear mapping model to obtain a corrected phase-change temperature; inputting the corrected phase change temperature into a gradient temperature control module containing a standard sample; and comparing the offset of the actual phase change position and the theoretical position of the reference material, and reversely correcting and correcting the phase change temperature based on the offset to obtain the final calibration temperature. The calibration accuracy of the phase change temperature of the phase change material can be improved.

The invention relates to a multi-principal element alloy local lattice distortion measurement method based on a synchrotron radiation X-ray atom pair distribution function, which comprises the following steps: preparing an experimental material, and collecting two-dimensional diffraction data by using synchrotron radiation high-energy X-rays; separating local and average structure information through an atom pair distribution function; and verifying local distortion causes by combining structure fitting and DFT supercell relaxation. According to the method, the accuracy of capturing the local distortion of the atomic scale can be improved, the integrity of statistical information of the local structure distortion of the quantitative characterization material can be fully supplemented, and high-precision measurement and quantitative analysis of dynamic distortion can be systematically realized.

The invention relates to a method for evaluating the volume change rate of martensitic steel after heat treatment, a martensitic steel sample is subjected to heat treatment, the sample subjected to heat treatment is subjected to XRD (X-Ray Diffraction) test, and experimental parameters of the XRD test comprise diffraction peak intensity of martensite and austenite in the sample subjected to heat treatment; calculating the volume percentage V 'gamma of austenite in the heat-treated sample and the volume percentage V' alpha of martensite in the heat-treated sample; and substituting the V 'gamma, the V' alpha, the martensite lattice constant a alpha and the austenite lattice constant a gamma into a formula # imgabs0 # to calculate the volume change rate of the martensite steel after heat treatment. According to the method, the volume change condition of the martensitic steel after heat treatment can be obtained, the stability of the material after heat treatment is preliminarily pre-judged, the regulation and control capability on the dimensional stability of the material is improved, and the influence of different heat treatment processes on the dimensional stability of the martensitic steel is effectively evaluated.

The invention provides a device and a method for detecting residual stress and defects of a diaphragm by a neutron source. The device comprises a neutron source, a neutron detector, a diaphragm fixing assembly and a console, and the residual stress and defects of the diaphragm are nondestructively detected through a neutron diffraction technology. The diaphragm is fixed through the diaphragm fixing assembly, and the neutron beam of the neutron source is adjusted, so that the neutron beam completely covers the diaphragm; adjusting the angle of the diaphragm through the diaphragm fixing assembly, repeatedly recording stable diffraction signals to obtain multiple groups of strain data, and analyzing and processing to generate a residual stress nephogram and a defect distribution result. According to the scheme, accurate detection of residual stress and defects of the to-be-detected diaphragm is realized through the neutron diffraction technology, the method has the advantage of nondestructive detection, avoids damage to the diaphragm, is suitable for detection of various diaphragm materials, is accurate in measurement and simple and convenient to operate, reduces manual operation errors, and improves the detection accuracy. And meanwhile, the data is further analyzed and processed by utilizing cloud computing and a big data technology, so that the detection accuracy and efficiency are improved.

The invention discloses a method for improving obdurability matching of titanium alloy by inducing an FCC phase through high-temperature impact deformation, and belongs to the technical field of metal material phase change regulation and control. The method comprises the steps that after annealing treatment and surface treatment are conducted on a substrate material, the substrate material is sequentially covered with a sacrificial layer and a restraint layer and evenly pressed, the substrate material is placed on a heating table of a high-temperature impact deformation device to be preheated, and the substrate material is subjected to high-temperature impact deformation; according to the method, the energy required for transformation of the HCP phase to the FCC phase is reduced, the heating temperature and laser shock parameters are set, the HCP phase is induced to be transformed into the FCC phase under the dynamic stress-temperature synergistic effect through multi-pass laser shock peening and high-temperature and high-speed shock deformation, the FCC phase, nano twin crystals and residual compressive stress form the synergistic peening effect, and therefore the HCP phase is converted into the FCC phase. Further, the grain refinement process is accelerated, the strength and plasticity matching is improved, and the high-temperature impact deformation induces the FCC phase to improve the strength and toughness matching of the titanium alloy; the substrate is made of industrial pure titanium or titanium alloy. The method is suitable for high-strength parts with complex geometrical shapes, is more widely applicable than traditional rolling annealing, and provides reference for strengthening and toughening of titanium alloy.

The invention discloses a method for detecting organophosphorus pesticides through a colorimetric sensor array, and relates to the technical field of organophosphorus pesticide detection and separation. The detection effect is improved; comprising the following steps: synthesizing a ZrMOF (at) Pt (at) ZrMOF composite material with a hierarchical structure; catalyzing an enzymatic reaction between a chromogenic substrate and hydrogen peroxide by using the composite material; and an organophosphorus pesticide identification mode is constructed through multi-channel colorimetric signal change. The ZrMOF (at) Pt (at) ZrMOF composite material with a three-layer structure (inner-layer ZrMOF, middle-layer PtNPs and outer-layer ZrMOF) is used as a sensing element, the inner-layer ZrMOF provides a larger anchoring surface area for PtNPs and reduces aggregation, and the outer-layer MOF further stabilizes PtNPs and promotes charge transfer in a catalytic reaction process, so that the composite material shows higher peroxidase-like activity, and the sensing element has a good application prospect. The affinity to a substrate is good.

The invention relates to the technical field of semiconductor energy material detection, and discloses a table type X-ray spectrometer multifunctional combined integrated in-situ experiment device, which comprises an X-ray source, a light source, an X-ray detector, an X-ray detector, an X-ray detector, an X-ray detector, an X-ray detector and an X-ray detector, the sample table is used for adjusting the position of the sample in the light path; the flight pipeline is used for transmitting X-rays and signals; the detector is used for collecting electronic signals. By adopting the unique design of the X-ray monochromator and the focusing mirror, the measurement and analysis of an X-ray absorption fine structure and a crystal structure can be realized in a conventional laboratory environment without using a synchrotron radiation light source, and X-ray diffraction, scattering and absorption spectrograms comparable to a synchrotron radiation level are obtained with extremely high sensitivity and light source quality; qualitative and quantitative analysis, crystalline state and valence state analysis and long-range structure and short-range coordination structure analysis of elements are achieved, and grazing incidence X-ray diffraction, powder diffraction and XAS research can be conducted in real time.

A calculation method for fractal dimensions of shale pores includes steps as follows. S1: multiple shale samples from a target stratum of a study area are obtained, parameter values of geological parameters of each of the multiple shale samples are obtained, followed by dividing the multiple shale samples into target shale samples and experimental shale samples. S2: PCA is performed on the parameter values to obtain principal components representing a variation of the geological parameters. fractal dimensions are calculated based on an existing fractal dimension calculation method. S3: the principal components are used as independent variables and the fractal dimensions are used as dependent variables, followed by performing regression analysis to obtain a quantitative calculation model. S4: the fractal dimensions of the target shale sample are calculated according to the parameter values and the quantitative calculation model for the fractal dimension based on the parameter values.

The invention relates to the field of petroleum engineering, in particular to a method for evaluating the permeability damage degree of a low-permeability reservoir, which comprises the following steps of: 1) coring a target reservoir, and measuring by an experiment to obtain core mineral percentage content and rock mechanical parameters; 2) establishing a reservoir single proppant model, calculating the porosity change rate when the single proppant is embedded, and establishing a mechanical distribution function of the whole proppant and the rock wall surface according to the percentage content of the core minerals and the mechanical parameters in the step 1); and 3) converting the change of the permeability of the reservoir when the proppant just enters the stratum and is in a stable state into porosity change by combining the single-particle pore change rate and the rock mechanical distribution function, calculating a porosity change index, and evaluating the damage degree of the reservoir. According to the method disclosed by the invention, the reservoir damage and permeability reduction caused by propping agent embedding due to stress change are converted into a porosity change index, and the mine scale reservoir permeability damage degree is indirectly evaluated.

The present invention relates to the field of material testing technology and discloses a method and system for calibrating the phase change temperature of a phase change material. The method comprises: collecting surface temperature distribution data and crystal structure parameters of the phase change material using a dual-modal synchronous monitor and establishing a temperature-structure correlation matrix; determining the surface temperature distribution data corresponding to the mutation moment based on the temperature-structure correlation matrix when the crystal structure parameters undergo a sudden change, and calculating the initial phase change temperature range; constructing a nonlinear mapping model between the initial phase change temperature range and the heating rate, and dynamically compensating the initial phase change temperature range based on the nonlinear mapping model to obtain a corrected phase change temperature; inputting the corrected phase change temperature into a gradient temperature control module containing a standard sample; comparing the offset between the actual phase change position of the reference material and the theoretical position, and reversely correcting the corrected phase change temperature based on the offset to obtain a final calibration temperature. The present invention can improve the accuracy of phase change temperature calibration of phase change materials.

The invention belongs to the field of battery testing, and particularly relates to a rapid and secondary evaluation method for battery performance. The rapid evaluation method comprises the following steps: carrying out initial capacity testing on a to-be-tested battery and a reference battery; performing an overcharge test on the to-be-tested battery and the reference battery to obtain the overcharged capacities of the to-be-tested battery and the reference battery; and evaluating the battery performance through the capacity retention ratio of the to-be-tested battery and the reference battery. According to the method, firstly, the capacity test is performed on the fresh battery to obtain the initial capacity of the battery, secondly, the overcharge test is performed on the battery, the capacity test of the same system is performed again after the overcharge is finished, the capacity retention rate of the battery at the moment is calculated, and the difference of the battery performance can be preliminarily determined by comparing the difference of the capacity retention rates. When the difference of the battery capacity retention ratio is within 1%, secondary evaluation is continued, and the battery performance is accurately evaluated through the Fe content and / or the L content in the battery negative plate.

The invention relates to the technical field of X-ray imaging detection, and particularly discloses an industrial digital X-ray imaging detection control system, which obtains the size misjudgment degree of a pore in a pore detection image corresponding to a high scattering superposition layer in a plurality of historical scattering detection periods, and performs correlation analysis on the size misjudgment degree and the scattering superposition degree. Whether the scattering superposition influences the pore size or not is evaluated, whether the pore size detection error is related to the scattering superposition phenomenon or not can be determined, the source of the detection error can be accurately found out, the detection sequence can be reasonably arranged, the area with the high misjudged superposition value can be preferentially processed, and if the influence is caused, the scattering control coefficient is obtained. The digital X-ray imaging is regulated and controlled according to the scattering control coefficient, the energy of a ray source can be properly increased, and parameters such as the distance or the angle between the ray source and a workpiece can be adjusted, so that scattering is reduced.

Method for producing a substrate (202) for an optical element (200) of a lithography system (100), comprising the steps: a) Providing (S1) a crystal substrate (204) which has a crystal lattice (206) with at least a first, second, third and fourth crystal direction (302, 306, 308, 310) and a surface (214) which is arranged substantially perpendicular to the first crystal direction (302), wherein a geometric projection (306', 308', 310') of the second, third and fourth crystal direction (306, 308, 310) onto the surface (214) each characterizes an azimuthal installation orientation (138) of the crystal substrate (204) in an optical system (102, 104, 136) of the lithography system (100) with respect to a minimum stress-induced birefringence upon irradiation of a polarized radiation (210), and the installation orientation (138) is an orientation with respect to a rotation of the crystal substrate (204) about a central axis (220) passing through the surface (214) and arranged parallel to the first crystal direction (302), and b) determining (S2) an angular position (δ1, δ2, δ3) of at least one of the geometric projections (306', 308', 310') of the second, third and fourth crystal directions (306, 308, 310) onto the surface (214).

The invention discloses a CO2-water-rock reaction process in-situ measurement system and a CO2-water-rock reaction process in-situ measurement method, and relates to the technical field of geochemical water-rock reaction. The system comprises a reaction kettle unit, a CO2 injection unit, a pure water / salt water injection unit and a data acquisition unit, the reaction kettle unit comprises a reaction kettle, a vacuum pump and a temperature control device, the reaction kettle is provided with a containing cavity, the vacuum pump is communicated with the containing cavity of the reaction kettle, the temperature control device is located outside the reaction kettle, the CO2 injection unit is communicated with the reaction kettle, the pure water / saline water injection unit is communicated with the reaction kettle, and the temperature control device is located outside the reaction kettle. The data acquisition unit comprises a light source, an optical fiber, a spectrum analyzer and a data acquisition and analysis device; the CO2-water-rock reaction monitoring system has the beneficial effects that real-time monitoring of the whole CO2-water-rock reaction process is realized, and the problem that the reaction process cannot be monitored in real time in the previous CO2-water-rock reaction is solved.

The invention relates to the technical field of processing, testing or inspection of aircraft parts, and provides a surface corrosion evaluation method for an aluminum alloy plate with an epoxy coating, which comprises the following steps: acquiring an aluminum alloy plate sample with an epoxy coating at different time after being exposed in a coastal atmospheric environment, collecting two-dimensional closed corrosion area image data of the surface of the sample, and calculating the surface corrosion of the aluminum alloy plate with the epoxy coating according to the two-dimensional closed corrosion area image data; processing the image to extract a closed boundary of the corrosion area; calculating the boundary length of the corrosion area and the included corrosion area, and calculating the fractal dimension of the corrosion area based on the length and the area; according to the method, the correlation model between the fractal dimension of the corrosion area and the exposure corrosion time is established, the interval distribution of the fractal dimension under different corrosion time is determined, the method is used for evaluating the corrosion state and the development trend of the corrosion state, the limitation of parameter evaluation modes such as subjective judgment and single corrosion depth is avoided, and the accuracy and objectivity of a corrosion evaluation result are effectively improved.

The invention relates to a manufacturing method of a cross section TEM sample with a hot-dip galvanized steel coating structure. The method comprises the following steps: S1, cutting a sample; s2, oppositely adhering the test sample; s3, grinding and polishing the sample; s4, adhering the sample to a ring; and step S5, pit thinning: the sample polished in the previous step is subjected to side pit thinning by using a pit instrument, and then is subjected to thinning by using an ion thinning instrument so as to obtain a nano-scale thin area, and the sample is taken as the sample for cross section TEM characterization. The TEM imaging effect is good, and zinc coating structure, element analysis, phase analysis and high-resolution observation can be rapidly achieved.

The invention relates to a method for evaluating the volume change rate of martensite and austenite dual-phase steel after heat treatment, which comprises the following steps: carrying out XRD (X-Ray Diffraction) test on a martensite and austenite dual-phase steel sample, and calculating to obtain the volume percentage V 'gamma of austenite and the volume percentage V' alpha of martensite in the original dual-phase steel sample; the method comprises the following steps: carrying out heat treatment on a martensite and austenite dual-phase steel sample, and carrying out XRD test on the heat-treated sample, and calculating to obtain the volume percentage V ''gamma of austenite and the volume percentage V'' alpha of martensite in the heat-treated sample, and substituting the V 'alpha, the V' gamma, the V ''alpha, the V'' gamma, the martensite lattice constant a alpha and the austenite lattice constant a gamma into a formula to calculate the volume change rate of the heat-treated martensite and austenite dual-phase steel. The method can effectively analyze the phase change of the martensite austenite dual-phase steel after heat treatment, judges the dimensional stability of the dual-phase steel sample after heat treatment, and evaluates the influence of different heat treatment processes on the dimensional stability of the martensite austenite dual-phase steel.

The invention relates to the technical field of oil and gas well wall stability and fracturing yield increase development, in particular to a deep high-temperature rock statistical damage constitutive model construction method which comprises the following steps: performing mineral component and microstructure analysis on a deep rock core by adopting XRD (X-Ray Diffraction) and SEM (Scanning Electron Microscope) technologies, and performing quantitative statistics on mineral content to obtain a deep high-temperature rock statistical damage constitutive model. The method comprises the following steps: acquiring rock brittleness and plasticity characteristic basic data, performing a triaxial compression test by adopting a high-temperature triaxial compressor, and establishing a constitutive model capable of reflecting deep high-temperature rock damage; according to the mechanical characteristics of the deteriorated rock due to temperature rise, the provided model is verified to accurately simulate stress-strain curves of a sample in each stage of a single axis and a conventional three axis under different temperatures and confining pressures, the rationality of indexes is verified, and the deep high-temperature rock statistical damage constitutive model is obtained. The method solves the problem that in the prior art, a statistical damage constitutive model capable of accurately reflecting stress-strain characteristics of the deep high-temperature rock at each stage of a single axis and a conventional three axis under different temperatures and confining pressures is lacked.