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51 results about "Nanoindentation" patented technology

Nanoindentation, also called intrumented indentation testing , is a variety of indentation hardness tests applied to small volumes. Indentation is perhaps the most commonly applied means of testing the mechanical properties of materials. The nanoindentation technique was developed in the mid-1970s to measure the hardness of small volumes of material.

Casing material for power storage device, production method therefor, and power storage device

A casing material for a power storage device, including a laminate that includes, in order, at least a base material layer, a barrier layer, and a heat-fusible resin layer. The heat-fusible resin layer includes a single layer or a plurality of layers. The heat-fusible resin layer includes at least one layer having a hardness of at least 70 MPa from a cross-section in the lamination direction of the laminate, measured using a nanoindentation method using an indentation load of 100 μN.
Owner:DAI NIPPON PRINTING CO LTD

Multi-scale performance evaluation and optimization method and device for well cementation cement stone

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.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)

Simulation method for studying life period mechanical property of aluminum alloy material for reactor

The invention relates to a mechanical property simulation method for researching the service life of an aluminum alloy material for a reactor. The simulation method for the life period mechanical property of the aluminum alloy material comprises the following steps: S1, preparing initial, middle and last stage aluminum alloy samples according to a < 27 > Al-< 28 > Si transmutation path of the aluminum alloy material; s2, representing the sample by using a transmission electron microscope, obtaining precipitated particle parameters, calculating a volume fraction f, fitting f and operation time t, and constructing a precipitation evolution model f (t); s3, performing high-energy ion irradiation on the sample, and performing nanoindentation experiment and load-depth curve fitting to obtain nano hardness H; s4, based on the f (t), establishing a relation model of the nano hardness H and the irradiation damage D; and S5, calculating the change quantity of the nano hardness H, converting the change quantity into the change quantity of the yield strength, associating the irradiation damage D with the service time T, and establishing a life period yield strength prediction model. According to the method, the mechanical property of the aluminum alloy in the full service cycle of the research reactor can be accurately evaluated.
Owner:SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE CO LTD +1

Quantitative evaluation method for shale brittleness based on bedding characteristics

The invention discloses a quantitative evaluation method for shale brittleness based on bedding characteristics, and relates to the field of petroleum and natural gas engineering, in particular to the quantitative evaluation method for the shale brittleness based on the bedding characteristics in the exploration and development process, and the quantitative evaluation method comprises the following steps: taking a rock sample from shale at a target layer to obtain the maximum Young modulus of a block; calculating a macroscopic brittleness index; processing the rock sample into a cuboid rock block for a nanoindentation experiment, calculating an interlayer heterogeneous coefficient between two corresponding adjacent probes according to mechanical parameters at the same transverse position between stratums so as to obtain a microscopic brittleness index, and calculating the total brittleness index of the rock by combining the microscopic brittleness index with the macroscopic brittleness index; microcosmic rock mechanics experimental data between different stratums of shale are tested on the basis of nanoindentation for the first time, heterogeneity between different stratums is quantitatively calculated, quantitative evaluation of shale rock microscopic brittleness is achieved, and compared with a conventional macroscopic evaluation method, quantitative evaluation is further improved.
Owner:SHAANXI YANCHANG PETROLEUM GRP

Method for obtaining mechanical properties of granite and application of granite

The invention relates to a method for obtaining mechanical properties of granite and application of the granite in deep geological disposition, local mechanical parameters (elastic modulus, hardness and fracture toughness) of the granite are obtained through a nanoindentation experiment, the reliability of a model is verified in combination with finite element numerical simulation, and experiment and simulation results show that the mechanical properties of the granite can be obtained. The method can accurately predict the mechanical property degradation trend of the granite in the high-temperature and high-pressure environment (for example, the elastic modulus is reduced to 54.71 GPa at 650 DEG C, and the hardness is reduced by 34.38%), and an efficient and reliable analysis tool is provided for surrounding rock stability evaluation of a high-level radioactive waste geological repository.
Owner:NANHUA UNIV

Method for eliminating helium bubble defect in nuclear power steel and product

The invention relates to a method and a product for eliminating helium bubble defects in nuclear power steel, which comprises the following steps of: treating the nuclear power steel which is damaged by helium ion irradiation to generate helium bubble gathering and surface hardening by pulse current, eliminating the helium bubble defects, recovering the surface hardness of the nuclear power steel, and realizing dynamic self-repairing of irradiation damaged tissues of the nuclear power steel. The method is suitable for pulse current elimination of irradiation helium bubble defects of nuclear power steel such as austenitic stainless steel and austenite-ferrite duplex stainless steel, and is also suitable for pulse current elimination of irradiation helium bubble defects of any metal material. Experiments prove that helium bubbles induced by irradiation cause serious hardening of the surface of the material, and after the helium bubbles are eliminated through pulse current treatment, nanoindentation tests show that the hardness of the material is remarkably reduced and basically returns to the original level before irradiation. The method has the advantages of short treatment time and low energy consumption, and can effectively prolong the service life of key components such as nuclear-grade main pipelines.
Owner:UNIV OF SCI & TECH BEIJING

High-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and preparation method thereof

The application discloses a high-entropy rare earth strontium aluminate thermal barrier coating material with high fracture toughness and a preparation method thereof, and belongs to the technical field of thermal barrier coatings. 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Gd 0.2 )2SrAl2O7. The high-entropy rare earth strontium aluminate thermal barrier coating material is synthesized by a solid phase method. According to the high-entropy design of the rare earth strontium aluminate, five different rare earth elements are doped in the rare earth position, the dislocation resistance of the ceramic is increased by using the serious lattice distortion effect, and the mechanical properties are improved. Through nanoindentation test, the fracture toughness reaches 2.15MPa.m 0.5 , so that the high-entropy rare earth strontium aluminate thermal barrier coating can better prevent the growth and extension of cracks.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Quantitative evaluation method for micro-area comprehensive mechanical properties of electron beam welding joint

The invention provides a quantitative evaluation method for micro-area comprehensive mechanical properties of an electron beam welding joint, and belongs to the technical field of material mechanical property evaluation.A load-displacement curve is obtained through a nanoindentation test, and a data processing method combining numerical integration and high-order derivative calculation is adopted, so that the comprehensive mechanical properties of the electron beam welding joint are evaluated. Meanwhile, three performance parameters of strength, plasticity and strain hardening are extracted, and a quantitative mapping relation between the three performance parameters and the microcell structure is established. The method solves the problem of mechanical property quantitative evaluation of gradient structures of a fusion zone, a heat affected zone and a base metal zone of a welding joint, and the problems of high cost, low efficiency, single parameter and the like in the existing evaluation technology.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

A discrete element equivalent crystal simulation method, system, medium, and device

This invention discloses a discrete element method, system, medium, and equipment for simulating equivalent crystalline materials, relating to the field of numerical simulation of rock mechanics. The method includes: converting granite images into binary images using a binarization method to identify various minerals within the binary images; determining the size data of various minerals in the binary images based on a particle size statistical algorithm; extracting micromechanical parameters using nanoindentation experiments combined with a trial-and-error method, and constructing multiple sets of equivalent crystalline models based on the mineral size data; dividing each set of equivalent crystalline models into multiple regions using a Brazilian splitting experiment; determining the optimal magnification for each region of each set of equivalent crystalline models by magnifying from non-critical regions to critical regions using a magnification algorithm, obtaining differentiated equivalent crystalline models; and performing Brazilian splitting numerical simulation using these differentiated equivalent crystalline models to obtain simulation results.
Owner:CHINA UNIV OF MINING & TECH

Irradiation hardening coefficient generation method and radiation hardening evaluation method

The invention discloses an irradiation hardening coefficient generation method and an irradiation hardening evaluation method, and relates to the technical field of irradiation hardening. The coefficient generation method comprises the following steps: performing ion irradiation on a test sample, and simulating according to ion irradiation parameters to obtain an irradiation damage depth distribution map; performing nanoindentation test on the test sample subjected to ion irradiation and a control sample of the test sample to obtain a first load displacement curve of the test sample and a second load displacement curve of the control sample; obtaining first and second simulated load displacement curves according to the first and second load displacement curves; obtaining a first elastic-plastic transition point and a second elastic-plastic transition point according to the first load displacement curve, the first simulated load displacement curve, the second load displacement curve and the second simulated load displacement curve; and obtaining the irradiation hardening coefficient according to the first elastic-plastic transition point, the second elastic-plastic transition point and the irradiation damage depth distribution map. Therefore, the radiation hardening can be quantitatively evaluated.
Owner:HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES +1

Nanoindentation parameter inversion method based on neural network agent model

The invention discloses a nanoindentation parameter inversion method based on a neural network proxy model, and belongs to the technical field of material mechanical property characterization, and the method comprises the steps: obtaining nanoindentation test displacement data of a target welding spot material under the combination of multiple strain rates and temperatures, and constructing a test sample set; determining a to-be-identified viscoplastic constitutive model, constructing a to-be-inverted parameter vector and a value range, and forming a parameter space; latin hypercube sampling is adopted to generate a construction parameter set in a parameter space, model files are generated and submitted to finite element simulation in batches, and a simulation sampling set is obtained; carrying out convergence and physical consistency screening on the simulation sampling set, and removing abnormal samples to obtain an effective simulation sample set; training a neural network agent model by using the effective simulation sample set; and outputting a to-be-inverted viscoplastic constitutive parameter vector for the test sample set based on the trained model. The method is high in parameter acquisition efficiency, strong in adaptability and good in inversion effect, and has good engineering applicability and popularization value.
Owner:NORTHWESTERN POLYTECHNICAL UNIV +1

Rock elasticity modulus prediction method and device, electronic equipment and storage medium

The invention discloses a rock elasticity modulus prediction method and device, electronic equipment and a storage medium. The method comprises the following steps: in the process of carrying out nanoindentation test on at least two position points of a rock sample, respectively obtaining nanoindentation test data corresponding to each position point in real time; determining a mineral component type corresponding to each position point; wherein the mineral components comprise a hard component and a soft component; determining a hard component elastic modulus and a soft component elastic modulus of the rock sample according to the nanoindentation test data corresponding to each position point and the mineral component type corresponding to each position point; and determining the rock elasticity modulus of the rock sample based on the hard component elasticity modulus and the soft component elasticity modulus. Through the technical scheme provided by the embodiment of the invention, the problem that part of parameters are assumed and are difficult to calculate in an existing model is solved, and accurate prediction of the elastic modulus of the rock is realized.
Owner:CHINA NAT PETROLEUM CORP +1

Three-stage step type nanoindentation creep test indenter and preparation method thereof

The invention discloses a three-stage step type nanoindentation creep test indenter and a preparation method thereof. A working part of the pressure head body is composed of three platform-shaped steps which are sequentially distributed in the direction of a central axis, the cross sectional areas of the three platform-shaped steps are increased in a stepped mode, the overall outline of the pressure head body is in a triangular pyramid shape, the surface of the pressure head body is an sp3 hybrid diamond crystal surface subjected to low-temperature catalytic molten salt etching treatment and without an amorphous carbon damage layer, and the curvature radius of the tip of the first step is smaller than 10 nm; the preparation method comprises the following steps: processing a blank by using a focused ion beam; performing pre-passivation to form a tungsten-containing solid precursor film; immersing into low-temperature molten salt containing a vanadium catalyst for reaction; and finally quenching and cleaning. According to the method, through a catalytic cooling and adsorption shielding cooperation mechanism, the sharp point sharpness is effectively kept while an amorphous carbon damaged layer is removed, parasitic creep interference caused by an amorphous layer is eliminated, and cross-scale graded high-precision testing is achieved.
Owner:HARBIN INST OF TECH ZHENGZHOU RES INST +1

Carbonate rock cross-scale mechanical property characterization method

The invention discloses a carbonate rock cross-scale mechanical property characterization method. The carbonate rock cross-scale mechanical property characterization method comprises the following steps: S1, basic physical property characterization; s2, processing a carbonate rock micromechanics experiment sample; s3, scanning electron microscope observation and microcosmic mineral identification; s4, correcting the area function of the needle tip of the pressing needle; s5, testing the micromechanical property of the carbonate rock mineral; s6, carrying out data arrangement on the micro-mechanical properties and the composition proportion; and S7, constructing a mechanical upscaling model and calculating macromechanical properties. According to the method, main mineral types in carbonate rocks are identified by utilizing a scanning electron microscope and energy spectrum analysis on a microscopic scale, and then the mechanical properties of different minerals are quantitatively represented by utilizing quasi-static nanoindentations. On the basis, mineral composition proportion information and porosity data are synthesized, an upscaling model of the mechanical property is constructed, and cross-scale prediction and evaluation of the macroscopic mechanical property of the carbonate rock are achieved.
Owner:SOUTHWEST PETROLEUM UNIV

Boron elementary substance B60, preparation method thereof and preparation method of Na4B60

PendingCN122035886ABoron/boridesElectronic conductivityIcosahedron
The invention discloses elemental boron B60, a preparation method thereof and a preparation method of Na4B60. The boron elementary substance B60 disclosed by the invention is characterized in that the crystal structure of the boron elementary substance B60 belongs to an Ima space group, a structural framework of each unit cell is formed by four B12 icosahedrons on average, and gaps among the four B12 icosahedrons are filled with the rest 12 B atoms. The invention also relates to a preparation method of the boron simple substance B60, which comprises the step of synthesizing the boron simple substance at 400-1000 DEG C under a vacuum condition by using Na4B60 as a raw material. The invention also relates to a preparation method of the Na4B60, which comprises the step of enabling a boron simple substance, a sodium simple substance and a zinc simple substance to react at the pressure of 0.5 GPa or higher and the temperature of 1000 DEG C or higher to obtain the Na4B60. The method is simple in process, low in cost and suitable for large-scale production. The obtained boron simple substance has the advantages of high purity, narrow optical band gap, high conductivity, high nanoindentation hardness and unique plastic deformation capacity, and has application potential in the fields of electronic devices, high-temperature ceramics and the like.
Owner:YANSHAN UNIV

A turbidity current deposit micro-plastic extraction, identification and physical and mechanical property testing method

The present application relates to the technical field of sediment environment monitoring, and discloses a turbidity current sediment microplastic extraction, identification and physical and mechanical property testing method, which comprises the following steps: turbidity current observation data are screened through a quality control threshold value, and the concentration of suspended bodies and hydrodynamic environment characteristic data are obtained by using an acoustic inversion model and a vertical integral algorithm; the position of sediment sampling is determined by using computer tomography technology, and a C-M diagram is constructed in combination with particle size analysis to accurately identify the turbidity current sediment horizon; the horizon sample is subjected to multi-stage density flotation by using saturated potassium iodide solution, and microplastic samples to be tested are obtained by cooperating with chemical digestion; the polymer material is identified by using spectrum technology, and the hardness, elastic modulus and yield strength of the microplastic are calculated by using nanoindentation technology to record the load and displacement curves. The present application solves the problems of low extraction efficiency of deep-sea microplastics and lack of mechanical constitutive parameters, and realizes the coupling analysis of macroscopic dynamics and microscopic physical properties.
Owner:TIANJIN RES INST FOR WATER TRANSPORT ENG M O T

In-situ mechanical testing device and testing method of nanoindentation system

The present application relates to the technical field of rock mechanics test, and more particularly to a nanoindentation system in-situ mechanical test device and test method, the test device is installed on the test instrument base, comprising a test instrument base, a loading platform is installed on the test instrument base, the loading platform comprises an adjusting box, clamping assemblies are symmetrically arranged at the two ends of the adjusting box, a telescopic cylinder is connected between the adjusting box and the clamping assemblies, and side support assemblies are movably arranged on the two sides of the adjusting box; the clamping assembly comprises a clamping block, a locking sliding block is movably arranged at one end of the clamping block, and an adjusting sliding block is arranged at the other end of the clamping block, the adjusting sliding block is slidably connected or separated from the clamping block, a rotating pressing plate is rotatably arranged on the locking sliding block, the side support assembly further comprises an adjusting cylinder, and the telescopic end of the adjusting cylinder is slidably matched with the adjusting sliding block through an adjusting block; the test method is applied to the test device, a cuboid rock sample is clamped, a bidirectional compression force or a shear force or a tensile force is applied to the sample through the telescopic cylinder and the adjusting cylinder, and internal stress of the rock material is simulated.
Owner:UNIV OF SCI & TECH BEIJING

Inversion analysis method and device of material mechanics constitutive and electronic equipment

The invention relates to the technical field of material micro-area mechanical property testing, and discloses a material mechanical constitutive inversion analysis method and device and electronic device.The method comprises the steps that a nanoindentation test is conducted on a to-be-tested material, and an average load-depth curve is obtained; extracting inversion input parameters based on the average load-depth curve; constructing a dimensionless function based on dimensional analysis and a characteristic strain method, fitting the dimensionless function, and establishing a Ludwick constitutive inversion model; and on the basis of the inversion input parameters and the Ludwick constitutive inversion model, the mechanical constitutive parameters are solved, the multiple mechanical constitutive parameters of the material can be directly and uniquely inverted, and the experiment complexity and cost are remarkably reduced while the accuracy and uniqueness of the inversion result are guaranteed.
Owner:AECC HUNAN AVIATION POWERPLANT RES INST

Bidirectional locking adjustable clamping device for nanoindentation sample polishing process

The invention relates to the field of nanoindentation experiments, and discloses a two-way locking adjustable clamping device for a nanoindentation sample polishing procedure, the two-way locking adjustable clamping device comprises a bottom plate, an angle adjusting assembly is arranged on the upper surface of the bottom plate, a stand column is arranged on the surface of the angle adjusting assembly, and a sliding plate penetrates through the surface of the stand column and is slidably connected with the surface of the stand column; and the side wall of the rear end of the sliding plate penetrates through and is in threaded connection with a positioning screw rod, and a clamping assembly is arranged on the inner wall of the bottom end of the sliding plate. Through a double-locking structure of horizontal lateral clamping and vertical downward pressing, a lateral clamping block is precisely attached to the side wall of a sample, an upper pressing plate always presses the upper surface of the sample under the action of a reset spring, and all-directional fixing is formed; and in cooperation with the thread self-locking performance of the positioning screw and the locking screw, even if facing high-speed polishing friction force, no displacement and no flying of the sample can be ensured, the damage rate of the sample is greatly reduced, and the experiment efficiency is remarkably improved.
Owner:DALIAN MEDICAL UNIVERSITY

Method for extracting, identifying and testing physical and mechanical properties of turbidity current sediment microplastics

The invention relates to the technical field of sediment environment monitoring, and discloses a method for extracting, identifying and testing physical and mechanical properties of turbidity current sediment microplastics, which comprises the following steps of: screening turbidity current observation data through a quality control threshold value, and acquiring suspension concentration and hydrodynamic environment characteristic data by using an acoustic inversion model and a vertical integral algorithm; determining a sediment sample separation position by using a computed tomography technology, and constructing a C-M diagram in combination with particle size analysis so as to accurately identify a turbidity current deposition layer; carrying out multi-stage density flotation on the horizon sample by adopting a saturated potassium iodide solution, and carrying out chemical digestion to obtain a micro-plastic sample to be detected; and identifying the material of the polymer by combining a spectrum technology, recording a load and displacement curve by utilizing a nanoindentation technology, and calculating the hardness, elastic modulus and yield strength of the micro-plastic. According to the method, the problems of low extraction efficiency and lack of mechanical constitutive parameters of deep-sea micro-plastics are solved, and coupling analysis of macrodynamics and microscopic physical properties is realized.
Owner:TIANJIN RES INST FOR WATER TRANSPORT ENG M O T

Casing material for power storage device, production method therefor, and power storage device

A casing material for a power storage device, including a laminate that includes, in order, at least a base material layer, a barrier layer, and a heat-fusible resin layer. The heat-fusible resin layer includes a single layer or a plurality of layers. The heat-fusible resin layer includes at least one layer having a hardness of at least 70 MPa from a cross-section in the lamination direction of the laminate, measured using a nanoindentation method using an indentation load of 100 μN.
Owner:DAI NIPPON PRINTING CO LTD

Electric resistance welded steel pipe, impact absorbing member, and method for manufacturing electric resistance welded steel pipe

The C content in the chemical composition of an electric resistance welded steel pipe (1) according to the present disclosure is 0.19-0.35 mass%, and the tensile strength of the electric resistance welded steel pipe (1) is 1700 MPa or more. In a cross-section perpendicular to the pipe axis direction of a metal flow rising portion (3), a metal flow angle (AN), which is an angle between the outer circumferential surface of the metal flow rising portion (3) and a metal flow on the outer circumferential surface side, is 35-80°. In the cross-section, the hardness ratio RH of the average hardness (GPa) in a band-shaped region having a hardness of 8.5 GPa or more, obtained by a nanoindentation method, to the average hardness (GPa) in a band-shaped region having a hardness of 7.5 GPa or less is 1.8 or less. The FN value defined by equation (1) using the metal flow angle (AN) and the hardness ratio RH is 130 or less. (1): FN = ANRH
Owner:NIPPON STEEL CORPORATION

Method for testing compressive mechanical property of concrete interface transition area in three-axis direction

The invention relates to a method for testing the compressive mechanical property of a concrete interface transition area in the three-axis direction, which comprises the following steps: firstly, placing an aggregate model in a mold, pouring mortar, and curing and forming; taking out the aggregate model, taking a plane, in contact with the aggregate model, on the formed mortar as a z-direction detection surface, taking the z-direction detection surface as a starting surface, dividing a cuboid area with a certain thickness as a to-be-detected area, and in the to-be-detected area, taking a surface adjacent to the z-direction detection surface in the length direction as an x-direction detection surface, a surface adjacent to the z-direction detection surface in the width direction is a y-direction detection surface; and finally, testing the hardness and elastic modulus of the x-direction detection surface, the y-direction detection surface and the z-direction detection surface by using a nanoindentation technology. Compared with the prior art, the method overcomes the defect that the ITZ mechanical property in the three-axis direction cannot be tested in the conventional technology, the result is accurate and reliable, and the method has important significance on concrete ITZ research.
Owner:TONGJI UNIV

Release film and method for manufacturing multilayer electronic component using the same

A release film includes a substrate layer, and a release layer disposed on one surface of the substrate layer, and including a cured product of a release composition, wherein, when a surface of the release layer is analyzed using X-ray photoelectron spectroscopy (XPS), a ratio (Si / C) of an amount (at %) of silicon to an amount (at %) of carbon is 0.15 to 0.20, and a surface hardness measured by a nanoindentation method is 200 MPa to 300 MPa, and the other surface of the substrate layer facing the one surface has a center line average roughness Ra of 15 nm or less.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD

Method for evaluating sanding risk of deep reservoir by using nanoindentation data

PendingCN122329890AWell drillingNanoindentation
The application provides a method for evaluating sand production risk of deep reservoir by using nanoindentation data, which comprises the following steps: step 1, performing nanoindentation test, and performing indentation feature observation and data analysis; step 2, performing indentation depth-load curve and data analysis; step 3, calculating macro mechanical parameters based on a weak cementation surface model and nanoindentation data; and step 4, performing sand production risk evaluation based on nanoindentation test data. The method for evaluating sand production risk of deep reservoir by using nanoindentation data adopts drilling cuttings, and the sample is easy to obtain; the test adopts a common nanoindentation experiment, the process is simple, and the repeatability is strong; the sand production risk evaluation can be obtained by simple calculation, the quantitative evaluation of the sand production risk evaluation coefficient is obtained, the comparison is convenient and quantitative, and the result is intuitive and clear.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Alloy high-throughput preparation and characterization method

PendingCN122631397AHigh fluxNanoindentation
The application relates to an alloy high-flux preparation and characterization method, which comprises the following steps: preparing a first alloy rod material with a carbon content gradient in a radial direction; gradient heat treating the first alloy rod material, so that the first alloy rod material has a temperature gradient in the axial direction during the heat treatment process, and a second alloy rod material is obtained; cutting the second alloy rod material into a half cylinder along the carbon content gradient direction, performing Vickers hardness tests on different positions of the rectangular cross section of the half cylinder, and determining boundary conditions for one-dimensional steady-state heat conduction calculation and division of regions with different characteristic microstructures; and respectively adopting synchronous X-ray diffraction and high-speed nanoindentation tests to characterize phase compositions and phase characteristics of different positions of the rectangular cross section of the half cylinder. By adopting the above method, a UniSteel alloy composition-heat treatment process-microstructure-mechanical property relationship can be quickly established, and data support is provided for subsequent rapid screening of optimized alloy compositions (carbon contents) and heat treatment processes (isothermal holding temperatures), so that the work amount is greatly reduced, the research efficiency is improved, and the application has important significance.
Owner:SONGSHAN LAKE MATERIALS LAB

A nanoindentation test method for indentation creep material hardness and elastic modulus

The application discloses a nano-indentation test method for hardness and elastic modulus of indentation creep material, and relates to the technical field of solid material strength characteristic test. The method comprises the following steps: S1, fixing a sample to be tested on a sample table of a nano-indentation test device; S2, if high-temperature indentation test is performed, heating the sample and a sharp indenter, and performing temperature matching by using a temperature drift minimization method to achieve thermal equilibrium between the sharp indenter and the sample; S3, performing single-cycle or multi-cycle indentation test on the sample by using the sharp indenter, each single-cycle test process comprising a loading section, a load maintaining section, an unloading section and an indenter retraction section, and obtaining a curve of displacement and load change over time; and S4, processing and analyzing the curve of displacement and load change over time obtained in the step S3 to obtain the elastic modulus and hardness of the sample. The method provided by the application can process nano-indentation test of material hardness and elastic modulus under the condition of indentation creep.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY

Welded member and method for producing the same

PendingUS20260108974A1Welding electric suppliesVehicle componentsElectrical resistance and conductanceHardness
A welded member and a method for producing the welded member are disclosed. The welded member is prepared by resistance-spot-welding a sheet set including two or more overlapping steel sheets. The total thickness tall of the sheet set and the minimum thickness tweld of the resistance spot weld satisfy formula (1), and at least one of the two or more steel sheets is a steel sheet having a softened layer in a steel sheet surface layer. In a base metal zone in the steel sheet having the softened layer, the nanoindentation hardness Hbs of the steel sheet surface layer and the nanoindentation hardness Hbt inside the steel sheet satisfy formula (2).0.5<tweld / tall<1.(1)0.2<Hbs / Hbt<0.8(2)
Owner:JFE STEEL CORP

Radiation hardening coefficient generation method, radiation hardening evaluation method

The application discloses a kind of irradiation hardening coefficient generation method, irradiation hardening evaluation method, it is related to irradiation hardening technical field.Coefficient generation method includes: to test sample is ion irradiation, and according to ion irradiation parameter simulation obtains irradiation damage depth distribution atlas;After ion irradiation, the test sample and the control sample of test sample are carried out nanoindentation test, and the first load displacement curve of test sample and the second load displacement curve of control sample are obtained;According to the first, second load displacement curve obtains the first, second simulation load displacement curve;According to the first load displacement curve, the first simulation load displacement curve and the second load displacement curve, the second simulation load displacement curve obtains the first elastic-plastic transition point, the second elastic-plastic transition point;According to the first elastic-plastic transition point, the second elastic-plastic transition point and irradiation damage depth distribution atlas obtains irradiation hardening coefficient.Thereby, it can be quantitatively evaluated to irradiation hardening.
Owner:HEFEI INSTITUTE OF PHYSICAL SCIENCE CHINESE ACADEMY OF SCIENCES +1

Method for evaluating anisotropic and hydrated compressive strength of shale based on rock debris

The invention discloses a method for evaluating anisotropy and hydration compressive strength of shale based on rock debris, and relates to the technical field of exploration and development of petroleum and natural gas. According to the method, a nano-indentation experiment is adopted for testing the relation between indentation loads and displacement of the surface of a shale sample subjected to hydration treatment at different bedding angles; calculating to obtain the elastic modulus and hardness of the shale subjected to hydration treatment at different bedding angles; based on the elastic modulus and hardness parameters of the shale, establishing a uniaxial compressive strength calculation model by using a multivariate nonlinear multivariate fitting method; and finally, based on a modified Hoek-Brown strength criterion formula considering the anisotropy characteristics of the shale, calculating the compressive strength of the shale considering the anisotropy and the hydration effect. By adopting the method, the limitation of the size and shape of the shale sample can be broken through, the experiment cost and the test time consumption are reduced, the accurate and efficient evaluation of the shale compressive strength by considering anisotropy and hydration is realized, and the problem of testing the rock mechanical parameters of the underground deep shale of an oil-gas well is solved.
Owner:CHINA NAT PETROLEUM CORP +1