108 results about "Afm indentation" patented technology

The invention discloses a method for generating a micromechanical property distribution diagram of a solid waste composite cement-based cementing material, and belongs to the technical field of performance prediction of solid waste composite cement-based cementing materials, and the method comprises the following steps: acquiring BSE, EDS and nanoindentation data of a sample; identifying indentation areas in the nanoindentation mark graph, and generating masks corresponding to the areas; performing statistics on the regional masks to obtain element content data of each indentation region; establishing a prediction model by adopting machine learning based on the regional element content and the elasticity data; performing super-pixel segmentation on the BSE image to match the scale of the indentation area; calculating element features of the super-pixel regions, and predicting the elastic modulus of each super-pixel region; and mapping the predicted elastic modulus to a corresponding region to generate an elastic modulus distribution diagram. According to the method, prediction of the two-dimensional space distribution of the internal elastic modulus of the solid waste composite cement-based cementing material can be realized, and data and visual support are provided for material heterogeneity research and multi-scale modeling.

The invention relates to the technical field of metal powder metallurgy process simulation. The high-entropy alloy hot pressing sintering and nanoindentation coupled molecular dynamics simulation method comprises the steps that a three-dimensional multi-particle atomic model of a high-entropy alloy is built, and initial boundary conditions are set; adjusting an initial boundary condition to be a contractility boundary condition, setting process parameters of hot pressing sintering on the model, and executing molecular dynamics simulation of the hot pressing sintering process; performing molecular dynamics and Monte Carlo hybrid simulation on the sintered model; mechanical boundary conditions are set for the optimized atomic model, a virtual indenter is controlled to be pressed into the optimized atomic model, molecular dynamics simulation of a nanoindentation test is executed, and physical field response parameters are collected in the test process; and based on the physical field response parameters, macroscopic mechanical property indexes are extracted. According to the method, the mapping relation between the hot pressing sintering process parameters and the macroscopic mechanical property is established, and a basis is provided for optimization of the hot pressing sintering process of the high-entropy alloy powder.

The invention relates to a nanoindentation and reliability characterization technology thereof, in particular to a heterogeneous material welding reliability characterization method applied to a brush type sealing structure. By means of the nanoindentation technology, mechanical properties such as hardness, elasticity modulus and plastic deformation of the welded joint are obtained by analyzing indenter deformation and indentation morphology. Meanwhile, indentation testing is carried out on different positions of the brush type sealing welding joint, and the performance comparison condition of all areas of the welding joint is obtained. Compared with a traditional reliability characterization means, the device and the method have the advantages that various areas of the heterogeneous welding joint including a base material, a heat affected zone and a fusion zone are tested under the nanoscale, various material performance indexes such as hardness, elasticity modulus and plastic deformation are measured at the same time, and the device and the method have high-precision and multifunctional testing capacity and are suitable for popularization and application. And moreover, the joint cannot be damaged or other properties cannot be influenced, and compared with a room-temperature stretching result, the nanoindentation technology has relatively high reliability and repeatability, and an accurate characterization result is obtained.

The invention discloses a die forging process method for prolonging the service life of a die, which comprises the following steps of: (1) designing the die, improving and optimizing the design structure of a single blank into combined forging of two blanks, dividing a die cavity into single blanks through saw cutting after widening, and reserving a special indentation for saw cutting during design; (2) forging the combined forge piece by adopting die forging equipment; and (3) after forging is completed, the combined forging piece is cut into two independent valve body products along the saw cutting guide indentations. According to the method, the design structure of the flange position of the single forging blank is improved in a combined forging mode, deformation and even cracking of the die caused by narrow and deep die stress concentration are improved, the service life of the die is prolonged, meanwhile, the situation of uneven flash can be effectively improved after design improvement, and the utilization rate of raw materials is increased.

The invention discloses an in-situ force-displacement measuring device and method for a soft material, and belongs to the technical field of material mechanical property testing. The device comprises a base, three spherical supports symmetrically arranged on the base, a carrying disc carried on the spherical supports, and a weight set for applying a vertical load to the carrying disc. The top of the spherical support is coated with dye, and transfer paper is laid on the surface of the tested soft material; under the action of load, the ball body is pressed into the soft material to generate indentations, and the dye is transferred to the paper to form a dyeing area; the area or the equivalent diameter of a dyeing area is obtained through an image acquisition system, and a mapping relation between the area or the equivalent diameter and actual displacement is established in combination with a calibration curve, so that force-displacement response is indirectly obtained. The image processing comprises the sub-steps of preprocessing, binaryzation, morphological operation, connected domain analysis and the like. The calibration curve is established through fitting (u = a.Ab) of a displacement sensor and a power function. The device is simple in structure, low in cost and suitable for rapid and in-situ mechanical property screening and comparison testing of materials such as soft cushions and foam.

Provided is a high-strength steel sheet having excellent member strength, stretch flangeability, bendability, and delayed fracture resistance under atmospheric corrosion and in a coated state. The steel sheet has a prescribed component composition, microstructure and the like, the average value [tau q] of the plastic deformation initiation stress [tau q] measured by nanoindentation at a position 1 / 4 of the sheet thickness of the steel sheet is 2.50-4.10 GPa, the standard deviation [sigma q] of the tau q is 0.30 GPa or less, and the average value [tau q] of the plastic deformation initiation stress [tau q] is 0.30 GPa or less. When [tau s] is the average value of the plastic deformation start stress [tau] s measured by the nanoindentation method at a position 10 [mu] m from the surface of the steel sheet, the ratio of measurement points less than 0.85 * [tau s] is 25.0% or less.

The application discloses a kind of automatic strip's indentation mold plate device, it is related to packaging technical field, including: feed module, including the material disc that is wound with indentation strip, several guide auxiliary wheels and the main press wheel for indentation strip is compressed to indentation bottom plate surface;For separating the paper of indentation strip, it is received between material disc and main press wheel along indentation strip conveying direction;Punching module, including cutting tool, for driving cutting tool to lift along Z axis direction punching power component and for driving cutting tool to rotate around Z axis rotary power component;Head main mounting plate, feed module, paper receiving module and punching module are all arranged in head main mounting plate, to form head;Molding platform;Head movement component, for controlling head relative to molding area along X axis and Y axis moves, and controls head relative to molding area rotates around Z axis;With feed module, paper receiving module, punching module and head movement component are all signal connection control device, and the efficiency and precision of plate making are high, and the scope of application is wide.

The application discloses a kind of thermoplastic composite continuous forming methods.The system includes successively in the direction of material travel: multiple roll unwinding mechanism, flattening arrangement, continuous mould pressing device and double steel belt presser.Wherein, continuous mould pressing device is made of multiple independent presser module, for applying 5-15MPa high pressure to realize the sufficient impregnation of resin to fiber;Double steel belt presser follows immediately, for applying 1-3MPa low pressure to eliminate surface indentation generated in mould pressing process.The application is by high pressure impregnation and low pressure finishing function clear distinction and collaborative use, overcome the technical contradiction that impregnation quality and surface quality are difficult to obtain in prior art, both ensure the excellent internal impregnation quality of composite material, also obtain high surface flatness, realize the continuous production of high-quality thermoplastic composite plate.

The invention discloses a preparation method and a test method of a thin film section nanoindentation test sample. The preparation method comprises the following steps: providing n cuboid samples, wherein the samples meet n * dgt; w, l: w = 1: 1-2: 1, d is the thickness of the sample, l is the length of the sample, and w is the width of the sample; the non-target crystal faces of the n samples are subjected to opposite bonding, the width of an opposite bonding seam is not larger than 1 micrometer, the target crystal faces of the n samples are located on the same side and spliced to form a test face, the test face comprises at least two different target crystal faces, and therefore the self-supporting opposite bonding sample is obtained, the test face of the opposite bonding sample is subjected to polishing treatment, and the self-supporting opposite bonding sample is obtained. And the surface roughness of the test surface is smaller than 5% of the preset indentation depth, so that the section sample is obtained. According to the invention, the test sample is prepared by adopting a sample opposite adhesion mode, so that a plurality of samples can provide a plurality of different sections to be tested, and the test efficiency is remarkably improved.

The utility model relates to the technical field of adhesive tape creasing, and discloses an adhesive tape production-based creasing device which comprises a shell, a top frame is fixedly connected to the top of the shell, a first motor is mounted in the top frame, a first driving shaft is fixedly connected to the output end of the first motor, a first gear is fixedly connected to the outer part of the first driving shaft, and a second gear is fixedly connected to the outer part of the first gear. The device comprises a shell, a plurality of sliding grooves are formed in the left side of the interior of the shell, two connecting rods are slidably connected to the interior of the shell, tensioning rollers are fixedly connected to the exteriors of the two connecting rods, racks are fixedly connected to the tops of the two connecting rods, and limiting shafts are fixedly connected to the sides, away from each other, of the two racks. And the bottoms of the two connecting rods are fixedly connected with limiting plates. According to the utility model, the tension of the adhesive tape in the transmission process is accurately adjusted, the problems of non-uniform indentation, tensile deformation and even breakage of the adhesive tape and the like caused by improper tension of the adhesive tape can be effectively avoided, and the qualified rate of products is improved.

Provided is a laminate having a low refractive index and excellent mechanical strength. This laminate (10) comprises a void layer (11) and an adhesive layer (12), the adhesive layer (12) being directly laminated on one or both surfaces of the void layer (11), the refractive index of the void layer (11) being 1.30 or less as measured in the state of the laminate (10), the nanoindentation hardness being 0.5 MPa or more as measured by pressing an indenter into the adhesive layer (12) by 2000 nm using a nanoindenter, and the refractive index of the void layer (11) being 1.30 or less as measured in the state of the laminate (10). The peel strength between the void layer (11) and the adhesive layer (12) measured using a tensile testing machine at a tensile speed of 0.3 m / min is 3 N / 25 mm or more.

A component (10) of a domestic appliance, wherein a sheet metal part (12) of the component (10) is formed from a sheet metal (11); characterized in that a regular arrangement of micro-indentations (14) is provided on at least one sheet metal surface (12s1, 12s2) of the sheet metal part (12), each micro-indentation (14) having a depth (d) perpendicular to the sheet metal surface (12s1, 12s2) of not less than 40% of a sheet metal thickness (t) of the sheet metal part (12) and preferably having dimensions (l, w) along the sheet metal surface (12s1, 12s2) of not more than twice the sheet metal thickness (t), more preferably of not more than once the sheet metal thickness (t).

The invention discloses a nanoindentation simulation design-based material indentation depth calibration method, device, equipment and medium, and relates to the technical field of material mechanics characterization, and the method comprises the steps of establishing a continuous gradient material finite element geometric model corresponding to a Brookfield indenter nanoindentation experiment, and constructing a continuous gradient material constitutive model with an elastic modulus continuously changing; combining the two models to perform indentation simulation at a plurality of preset maximum indentation depths to obtain simulation results; calculating an equivalent elastic modulus based on a load displacement curve in a simulation result to determine a material indentation depth corresponding to a preset maximum indentation depth of the indenter; and establishing a quantitative mapping model between the preset maximum indenter indentation depth and the material indentation depth so as to map a test result of the Brookfield indenter nanoindentation experiment at the preset maximum indenter indentation depth to the corresponding material indentation depth according to the quantitative mapping model. And the nanoindentation test result can be accurately mapped to the specific depth position of the continuous gradient material.

The invention relates to a follow-up material supporting technology for aluminum curtain wall plate bending forming, and belongs to the technical field of metal plate machining. A material supporting area is divided into a first near-bending area, a second middle supporting area and a third free end follow-up area, and differentiated material supporting modes of avoiding guiding, same-speed face supporting and rolling traction are adopted; the middle area and the free end area are jointly arranged on the same follow-up base, so that self-driving synchronous follow-up of the plate is realized, and the problems of relative slippage, geometric interference, overhigh local pressure intensity, unstable supporting and the like caused by displacement and overturning of the plate during fixed material supporting in the prior art are effectively solved; the surface defects of scratches, indentations, atomization marks and the like of the visual surface of the aluminum curtain wall plate are remarkably reduced, meanwhile, the consistency and the rebound stability of the bending angle are improved through stable load transfer and continuous surface supporting, and therefore reliable machining under the working conditions of deep bending and high flanging is achieved on the premise that the high appearance quality is guaranteed.

This utility model discloses a forward and reverse creasing and cutting device with quick-change multiple blades, including a movable die-cutting carriage mounted on a die-cutting device. The die-cutting carriage is equipped with creasing blades and / or cutting blades. The device is characterized by further including a linkage slide table opposite to the die-cutting carriage. At least one creasing component is mounted on the linkage slide table to cooperate with the creasing blades on the die-cutting carriage to process forward and reverse marks on thin materials, and / or a blade pad to support the cutting blades on the die-cutting carriage when cutting thin materials. The linkage slide table is provided with mounting grooves for quick disassembly and replacement of the creasing component and / or blade pad. This utility model can perform forward and reverse bidirectional creasing and step-forming on paper and thin materials, and can perform reverse creasing when creasing graphic materials such as cardboard boxes, preventing the graphic creases from bursting.

The present invention relates to a laminate which comprises a polyimide-based film that contains a polyimide-based resin and metal layers that are provided on both surfaces of the film, wherein when the Vickers hardness and the Martens hardness are determined on both surfaces of the laminate in accordance with ISO 14577 under the conditions in which if an indenter is pressed into the laminate from the surface of one metal layer of the laminate in the thickness direction of the laminate, the maximum indentation depth exceeds the thickness of the metal layer on the side where the indenter is pressed into the laminate and is 10% to 50% inclusive of the thickness of the polyimide-based film, formula (I) PV / PM ≤ 0.135 is satisfied. (In the formula, PV represents the difference between the Vickers hardness determined on one surface of the laminate and the Vickers hardness determined on the other surface, and PM represents the difference between the Martens hardness determined on one surface of the laminate and the Martens hardness determined on the other surface.)

The invention discloses a plasticity constitutive parameter inversion method for a zinc sulfide infrared optical brittle material, and belongs to the technical field of material mechanical property characterization. According to the method, a zinc sulfide material nanoindentation simulation model is constructed, a nanoindentation experiment is carried out, meanwhile, an Oliver-Pharr method and a Johnson-Cook constitutive equation are adopted to obtain actual material hardness, elastic modulus and plasticity parameters of zinc sulfide to serve as input material parameters, and an automatic simulation experiment is carried out; the method comprises the following steps: acquiring a simulation displacement-load curve under different constitutive parameter combinations, performing prediction optimization on the displacement-load curve by using a prediction network to obtain a Pareto frontier solution, and constructing an inversion model by using an entropy weight method to obtain an optimal solution in a Pareto frontier solution set. According to the research, accurate characterization of the plasticity constitutive behavior of the zinc sulfide infrared optical brittle material is realized, and reliable method support can be provided for constitutive parameter identification and intelligent modeling of other brittle polycrystalline materials.

The present invention provides a hot-stamped part including a base steel sheet containing 0.19 to 0.25% by weight of carbon (C), 0.1 to 0.6% by weight of silicon (Si), 0.8 to 1.6% by weight of manganese (Mn), 0.03% by weight or less of phosphorus (P), 0.015% by weight or less of sulfur (S), 0.1 to 0.6% by weight of chromium (Cr), 0.001 to 0.005% by weight of boron (B), 0.1% by weight or less of an additive, the remainder of iron (Fe), and other inevitable impurities, wherein the number of indentation dynamic strain aging in the indentation strain rate observed with respect to an indentation depth of 200 to 600 nm during nanoindentation testing is 26 to 40.

The invention discloses a method for constructing a finite discrete element model of a composite material based on a micrometer indentation test. The method comprises the following steps: S1, calculating the reduction modulus Er and hardness H of each indentation point representing the area according to a load-displacement curve obtained by the micrometer indentation test; s2, constructing a data matrix, dividing a weak-phase material, a middle-phase material and a strong-phase material according to micro-mechanical properties of the composite material, and then calculating an elastic parameter, a plastic parameter and brittleness of the phase according to an indentation curve based on a classification result of a K-means algorithm; s3, carrying out inversion calculation on the basis of the obtained materials of each phase to obtain an elastic parameter, a plastic parameter and a brittleness parameter of the microscale of each material of each phase, and constructing a micron indentation model of the single-phase material on the basis of the parameters; s4, constructing a micron indentation model of the large-size multi-phase material; and S5, completing the construction of the model. The method has the advantages that the simulation result is more practical, the precision is high, and the data reliability is high.

The utility model discloses a die cutting indentation mechanism for a plastic packaging box, which comprises an operation table, a processing chamber used for cutting a film and indenting is arranged at the left end of the top of the operation table, a blanking plate used for blanking is arranged at the left end of the operation table, rollers used for blanking are arranged on a plate body of the blanking plate in an array state, and the left end of the operation table is provided with a die cutting device. A discharging plate is fixedly installed at the left end of the operation table, the discharging plate is arranged in an inclined state, a stock bin is fixedly installed at the left end of the operation table, the left end of the interior of the stock bin is arranged in an inclined state, the stock bin and the discharging plate are arranged in a corresponding state, a conveying structure is arranged at the top of the operation table, and a positioning structure is arranged at the top of the operation table. According to the die cutting creasing mechanism for the plastic packaging box, guiding in the conveying process can be achieved through cooperation of the conveying belt and the guiding wheels, materials can be continuously moved and positioned in the material treatment process, and meanwhile it can be guaranteed that the positions of the materials are not changed in the machining process through the rotating wheels and the rotating rollers.

The invention relates to the technical field of automobile part manufacturing and special glass processing, and discloses a curved glass forming method for an HUD technology, and the curved glass forming method comprises the following steps: placing a sheet glass raw sheet in a preheating chamber for preheating; glass is heated through a heating lamp set in the preheating chamber, and first-order deformation occurs under the gravity of the glass; the glass is moved to a forming chamber, the glass is subjected to i-order deformation by reducing the mold closing gap between the upper mold and the lower mold in a stepped mode, and i is larger than or equal to 2; after the ith-order deformation, a negative pressure device is started, suction force is applied to the glass, and the glass is subjected to (i + 1) th-order deformation; and the negative pressure device is closed, so that the upper die and the lower die are completely closed, and gradient cooling annealing is carried out. According to the method, the glass deformation process is precisely regulated and controlled, the surface shape precision of the curved glass is improved, and common surface indentation, microcracks and other apparent defects in a traditional hot bending process can be avoided.

A laminate includes a void-containing layer and a pressure-sensitive adhesive / adhesive layer. The pressure-sensitive adhesive / adhesive layer is directly laminated on one surface or both surfaces of the void-containing layer. A refractive index of the void-containing layer measured in a state of the laminate is 1.30 or less. Nanoindentation harness measured by pushing an indenter of a nano indenter into the pressure-sensitive adhesive / adhesive layer for 2000 nm is 0.5 MPa or more. Peel strength of interlayer between the void-containing layer and the pressure-sensitive adhesive / adhesive layer measured by a tensile testing machine at a tensile speed of 0.3 m / min is 3 N / 25 mm or more.

This invention discloses a dual-beam laser pressure welding method for aluminum-copper inlaid composite strips. The method uses an integrating mirror and a cylindrical mirror to modulate an infrared laser into a discontinuous linear spot with uniform energy distribution. Laser beam combining technology is then used to combine the discontinuous linear spot with a blue-infrared composite laser. During laser pressure welding, the blue-infrared composite laser periodically oscillates at the edge of the composite side, and rolling force is added for assistance. This effectively solves the problems of low peel strength, poor side bonding quality, and edge warping. Simultaneously, the uniform energy distribution of the discontinuous linear spot allows for the composite processing of wide-format composite plates. This method offers advantages such as high welding speed, high side bonding stability, low porosity at the bonding interface, and small surface indentations. It is applicable to the manufacturing of copper-aluminum inlaid composite strips of various specifications (i.e., variable width and depth of each inlay slot) and types (i.e., variable number of inlay slots).

In a hardness distribution of the silicon nitride substrate obtained by a nanoindentation test under a load of 0.5 mN, the ratio R1 (HA10 / HA90) of the hardness HA10 at a cumulative rate of 10% in a region having a hardness of less than 15.00 GPa to the hardness HA90 at a cumulative rate of 90% in a region having a hardness of less than 15.00 GPa is 0.25 or more, and the ratio R2 (HS10 / HS90) of the hardness HS10 at a cumulative rate of 10% in a region having a hardness of 15.00 GPa or more to the hardness HS90 at a cumulative rate of 90% in a region having a hardness of 15.00 GPa or more is 0.52 or more. According to the present invention, it is possible to provide a silicon nitride substrate having high reliability and high uniformity at the microstructure level, while having little temperature dependence of thermal conductivity and dielectric loss.

The utility model relates to an insulation paper creasing tool for a transformer. The insulation paper creasing tool is characterized by comprising a supporting bottom plate and a creasing module, the creasing groove is formed in the supporting bottom plate to be matched with the creasing unit, the creasing unit walks in the extending direction of the limiting guide rail, and the creasing unit is driven by the rotating unit to be embedded into the creasing groove, so that creasing treatment is conducted on insulation paper; during creasing, the pinch bar rotates out of the positioning groove of the positioning block, the outer guide sleeve is pulled to move to the position needing creasing, the pinch bar is rotated to drive the creasing unit to rotate around the hinged position, the outer contour of the creasing unit is matched with the creasing groove, and then the creasing unit is driven to move in the direction of the limiting guide rail to achieve rapid insulation paper creasing. Operation is simple and fast, efficiency is high, and positioning is accurate.

The invention relates to the field of material mechanical property testing, and provides an in-service material property detection system based on an indentation method, comprising: an excitation module for applying a composite dynamic excitation load to a pressure head when the spherical pressure head is pressed into a to-be-detected material; the signal acquisition module is used for synchronously acquiring a dynamic load signal and a dynamic displacement signal in the pressing-in process of the pressing head; the data processing module is used for calculating an instantaneous phase difference according to the dynamic load signal and the dynamic displacement signal, constructing an evolution curve of the instantaneous phase difference along with the change of the pressure depth, and extracting a first characteristic depth, a second characteristic depth and a phase hardening index from the evolution curve; and the performance resolving module is used for calculating the elastic modulus and the yield strength of the to-be-tested material according to the first characteristic depth, the second characteristic depth, the phase hardening index and the mapping relation model. According to the method, the plastic hardening constitutive relation of the material does not need to be preset, rapid and micro-damage detection of the tensile property of the material can be achieved through single-time micron-order pressing-in, and the method is particularly suitable for field evaluation of in-service equipment.

A packaging material used for a bag for transporting of a silicon material is a laminate in which a first resin base layer, a barrier layer, a second resin base layer, a resin layer, and a sealant layer are laminated in that order, wherein an indentation elastic modulus (MPa) of the resin layer is smaller than an indentation elastic modulus (MPa) of each of the first resin base layer and the second resin base layer by one or more orders of magnitude, an indentation elastic modulus (MPa) of the sealant layer is smaller than an indentation elastic modulus (MPa) of the first resin base layer and an indentation elastic modulus (MPa) of the second resin base layer by one or more orders of magnitude, and a difference between the indentation elastic modulus (MPa) of the first resin base layer and the indentation elastic modulus (MPa) of the second resin base layer is smaller than a difference between the indentation elastic modulus (MPa) of the second resin base layer and the indentation elastic modulus (MPa) of the resin layer.

One embodiment of the present disclosure provides a copper foil including a copper film having a matte surface and a shiny surface; and a protective layer disposed on the copper film, wherein the copper foil has an indentation creep rate of 2.0 to 6.0%. The indentation creep rate is measured using a nano-indenter.

To provide a cleaning blade excellent in wear resistance.SOLUTION: A cleaning blade in which a contact portion that comes into contact with a member to be cleaned is formed of a member that contains polyurethane rubber obtained by polymerizing at least a polyol component and a polyisocyanate component, has a ratio (EIT / Re) of an indentation elastic modulus (EIT [MPa]) to a rebound resilience (Re [%]) of 0.65 or more, has a rebound resilience (Re [%]) of less than 25%, and has a tensile stress at 23 °C and 200% strain of 15 [MPa] or more.SELECTED DRAWING: Figure 1