20results about "Investigating material ductility" patented technology

A method for the assessment of the irradiation embrittlement in a nuclear reactor pressure vessel RPV (10) comprises the steps (a): cutting a specimen (20, 40) from an un-irradiated RPV (10); (b): measuring grain size Dg of each grain (30) on a region (21, 41) of the specimen (20, 40); (c): performing several indentation tests at a temperature on this region; (d) to (g): for each test, calculating for each grain (30) the slip band number density N / Dg from equations; (h): repeating steps (c) to (g) at different temperatures to obtain an un-irradiated curve around the ductile-brittle transition temperature DBTT; (i): submitting specimen (40) to an irradiation dose and repeating steps (b) to (g) at different temperatures to obtain an irradiated curve around the DBTT; (j) and (k): assessing the irradiation embrittlement in the RPV from the ductile-brittle transition shift between the un-irradiated and irradiated curves.

The application discloses a method for setting rolling parameters in a lithium battery pole piece rolling process, which comprises the following steps: based on the process standard of the pole piece appearance and the wave edge height, rolling tests are carried out on the pole piece under different compaction densities to verify the relationship between the elongation of the material area and the elongation of the tab blank area and the tab dispensing area, and the ratio relationship between the elongation of the material area and the elongation of the tab blank area and the tab dispensing area under different compaction densities is determined; different elongation roller coating layer thicknesses and different stretching force values are set on the elongation roller to carry out elongation tests on the pole piece, the relationship between the elongation roller coating layer thickness and the stretching force value and the elongation of the pole piece blank is verified, and a fitting formula and an isogram of the elongation of the pole piece blank and the elongation roller coating layer thickness and the elongation stretching force value are obtained; based on the ratio relationship and the fitting formula, the stretching force value and the elongation roller coating layer thickness under the preset compaction density of the pole piece are calculated, and the isogram is verified.

The present invention provides a technology that enables easy and accurate acquisition of material properties that affect the dimensional accuracy of presses, even within a press line.The method for acquiring material properties of a metal plate for press working involves performing a stretching process on the metal plate, measuring the forming load and die stroke during the stretching process, and measuring the thickness of the metal plate, and then determining the yield stress of the metal plate from the measured forming load, die stroke, and thickness.

The invention relates to a testing machine and a testing machine sample chamber (12) for installation in a testing machine (10) for carrying out a material test of a material sample (18) comprising: a sample chamber body (48), a sample holding device (24) for holding the material sample (18) with a first side (26) and a second side (28), a receiving device (32) with a transparent material disc (30), an inlet device (22) for a fluid medium, wherein a sample chamber interior (20) is formed between the material sample (18) and the transparent material disc (30), which can be filled with the fluid. The invention further relates to a testing method for carrying out a material test of a material sample (18), a computer program, a machine learning model and a data processing device for controlling and / or regulating a testing machine (10).

To provide a cruciform tensile specimen with slits, when a biaxial tensile test is performed, capable of preventing fracture by reinforcing arms, and manufacturing method of the cruciform tensile specimen with the slits.SOLUTION: A cruciform tensile specimen 1 with slits comprising a square measurement part 3, and arms 5 extending from four sides of the measurement part 3 in a direction of applying a tensile load to the measurement part 3 and including a plurality of slits 7 formed parallel to the extending direction, is used for a biaxial tensile test for applying the tensile load in two orthogonal directions to the measurement part 3 via the four arms 5 to acquire a stress-strain relation under biaxial stress. The cruciform tensile specimen 1 with the slits comprises reinforcing materials 11 joined to cover the respective arms 5 and reinforcing the arms 5, where the reinforcing materials 11 are longer than at least the slits 7 in the direction applying the tensile load in the arms 5, and formed not to close the slits 7 by covering the arms 5.SELECTED DRAWING: Figure 1

The utility model relates to a hydraulic underwater mechanical structure pipe clamp, including main part (1), annular top tight device (2), hydraulic open and close support (3), hoist device (4), bolt sleeve (5), bottom fixed device (6), annular sealing rubber (8), axial sealing rubber (9), axial fastening bolt (10), sacrifice anode (11), pressure test hole (12), T type bolt (13), dust ring (14), pressure sensor (16), pressure test washer (17), annular fastening bolt (21), hydraulic cylinder (22), the main part includes two semicircular housings of symmetrical settings, the top hinged connection of two semicircular housings, annular top tight device sets up in the left and right two end parts of two semicircular housings, pressure sensor sets up on pressure test hole of one semicircular housing.

A new method for evaluating embrittlement of an amorphous alloy ribbon is provided. The method includes: pressing a pressurization member (125) from one side to a plurality of positions of an amorphous alloy ribbon; scattering, in the amorphous alloy ribbon, pressurization portions where the pressurization member is pressed to form indentation; and evaluating embrittlement by the number or distribution of pressurization portions where cracks have occurred.

A method for the assessment of the irradiation embrittlement in a nuclear reactor pressure vessel RPV (10) comprises the steps (a): cutting a specimen (20, 40) from an un-irradiated RPV (10); (b): measuring grain size Dg of each grain (30) on a region (21, 41) of the specimen (20, 40); (c): performing several indentation tests at a temperature on this region; (d) to (g): for each test, calculating for each grain (30) the slip band number density N / Dg from equations; (h): repeating steps (c) to (g) at different temperatures to obtain an un-irradiated curve around the ductile-brittle transition temperature DBTT; (i): submitting specimen (40) to an irradiation dose and repeating steps (b) to (g) at different temperatures to obtain an irradiated curve around the DBTT; (j) and (k): assessing the irradiation embrittlement in the RPV from the ductile-brittle transition shift between the un-irradiated and irradiated curves.

A method for detecting the recrystallization of a single-crystal superalloy blade, characterized in that it comprises: establishing a database for the recrystallization of single-crystal superalloys; performing creep tests under preset conditions on recrystallized single-crystal superalloy creep specimens with different recrystallization area fractions and maximum recrystallization depths under the same test conditions in order to obtain the recrystallization damage tolerance of the corresponding single-crystal superalloy and its corresponding blades under corresponding operating conditions;Obtaining the relevant parameters of the coordinate information of the deformation location of the single-crystal superalloy blade under test and entering these parameters into the database for the recrystallization of single-crystal superalloys in order to obtain the recrystallization area fraction of the cross-section and the maximum recrystallization depth at the deformation location of the single-crystal superalloy blade; Assessing whether the obtained recrystallization area fraction of the cross-section and the maximum recrystallization depth at the deformation location are smaller than their corresponding recrystallization damage tolerance, whereby, if so, the detection result for the deformation location is considered reliable and, otherwise, the detection result for the deformation location is considered unreliable.

A metal sheet includes a forming test step that forms a test specimen with an arbitrary lattice or a pattern for strain analysis while capturing an image of the surface, analyzing images obtained during the forming to measure the strain, and storing the strain in time series from the start of the forming to the occurrence of fracture to construct a strain database; and a forming limit analysis step includes setting, an evaluation point sequence for acquiring a strain distribution in the vicinity of a portion where fracture has occurred, extracting strain corresponding to the position of the evaluation point sequence in an arbitrary forming step from the strain database, calculating an approximation strain curve corresponding to the position of the point sequence, determining, the difference between the strain based on the approximation strain curve and analyzing the images, and determining a forming limit based on the obtained approximation error.

The application discloses an alloy process parameter optimization method and system based on transfer learning, belongs to the technical field of industrial intelligent control, and is used for solving the technical problems that current alloy process parameter optimization methods cannot adapt to new specification cold start, black box constraint processing capacity is limited, and single round batch output differentiated candidate process parameter points cannot be supported. The method comprises the following steps: training a historical prior model through a historical data set; completing the first round optimization of the current parameter optimization task according to the historical prior model; training a task adaptive model according to a measured performance data set obtained after the first round optimization; performing knowledge fusion on the historical prior model and the task adaptive model according to a self-defined historical confidence weight function; constructing a collection function with different search preferences in a process parameter search space and performing parameter optimization to obtain multiple groups of candidate process parameters and acquire measured performance data, retraining the task adaptive model until a preset convergence condition is met, and outputting optimal process parameters.

This invention discloses a method for testing the high-temperature solid-state ductility of copper ingots, relating to the field of metal material processing performance testing technology. Addressing the problem of the lack of effective, intuitive, and low-cost methods for testing the high-temperature solid-state ductility of copper ingots in existing technologies, this invention provides a testing method comprising: processing the copper ingot to be tested into a cylindrical sample with a first volume; heating it to 300℃-800℃ and then transferring it to a preheated testing mold for hot-burning operation; after cooling and demolding, removing the flash and measuring the third volume of the formed hot-burned part; using the ratio of the third volume to the first volume as the filling integrity to evaluate ductility. The testing mold adopts a radial multi-stage flow channel structure, including a central main chamber, several primary flow channels, and secondary and tertiary flow channels respectively connected to it. By progressively reducing the cross-sectional area, the flow resistance is increased, amplifying the difference in ductility; this invention also incorporates the average distance between the filling ends of the secondary and tertiary flow channels as an auxiliary evaluation index.

The application discloses a kind of high-precision evaluation methods of the forming capacity of rolled steel plate for automobile, using the following steps: 1) prepare uniaxial tensile sample, carry out uniaxial tensile test to sample at least three strain rates;2) with a certain strain rate as benchmark rate, calculate the formability index under benchmark rate according to the uniaxial tensile test result;3) calculate the ratio of the uniform elongation of each strain rate and the uniform elongation of benchmark rate;4) according to the same technical conditions and strain rate of uniaxial tensile test, carry out uniaxial tensile simulation under each strain rate;Calculate the ratio of each actual uniform elongation and simulation uniform elongation, and calculate the average ratio of actual and simulation;5) calculate the material overall forming capacity index.This method can conveniently obtain comprehensive forming capacity index according to the actual thickness of material and basic mechanical properties under different strain rates, and realize the quantitative characterization of forming capacity of different brand and specification materials.

The utility model provides a sealing ring testing arrangement, will fixed part and fixed clamping piece set up respectively in both ends of support plate, and with the sliding setting of movable clamping piece in support plate, movable rod is equipped with outer thread, and fixed part is equipped with first screw hole with movable rod thread cooperation, and the both ends of weighing sensor are connected with the first end of movable rod and movable clamping piece through drawstring respectively, and measuring scale is set up in support plate, can be through fixed clamping piece and movable clamping piece respectively to the both sides of sealing ring clamping, and mark the current position of movable clamping piece, then the weighing sensor is zero, then through the rotation movable rod, makes movable rod away from fixed clamping piece, when the value of weighing sensor reaches the preset value, uses measuring scale to record sealing ring deformation, and observes the color change of sealing ring, therefore, through above -mentioned measurement mode, can effectively test out the ductility, pressure and elasticity of different sealing rings under the condition of certain tension.

Forming tool (100) for the press-based production of sheet metal components by forming a sheet metal material (M), comprising at least two mutually movable tool parts (110, 120) between which the sheet metal material (M) to be formed can be arranged and formed by performing a closing stroke (D) generated by the press, characterized in that this forming tool (100) has a testing device (200) with which the sheet metal material (M) located between the tool parts (110, 120) can be tested with regard to its forming properties during a closing stroke (D), comprising - a test stamp (210) which is pressed into the sheet metal material (M) during the closing stroke (D) in an area (A) outside the sheet metal component geometry, and - an eddy current test sensor (240) with which the deformation of the sheet metal material (M) brought about by the test punch (210) can be detected simultaneously.

To provide a metal sheet forming limit determination technology for quantitatively determining a forming limit with less variation. The metal sheet forming limit determination method includes a forming test step that includes forming a test specimen with an arbitrary lattice or a pattern for strain analysis on the surface while capturing an image of the surface of the test specimen, analyzing images sequentially obtained during the forming to measure strain generated in the metal sheet, and storing the measured strain in time series from the start of the forming to the occurrence of fracture to construct a strain database; and a forming limit analysis step that includes setting, on the test specimen, an evaluation point sequence for acquiring a strain distribution in the vicinity of a portion where fracture has occurred, a step of extracting strain corresponding to the position of the evaluation point sequence in an arbitrary forming step from the strain database, calculating from the extracted strain an approximation strain curve corresponding to the position of the evaluation point sequence, determining, as an approximation error, the difference between the strain based on the approximation strain curve and strain measured by analyzing the images, and determining a forming limit based on the obtained approximation error.

This invention discloses an in-situ measuring device for the creep effect of soluble rock veins in the field of geotechnical material experimental technology. It includes a shell and a rotating shaft rotatably disposed inside the shell. Multiple pressure plates are equidistantly distributed along the circumference of the bottom outer perimeter of the shell, forming a pressure ring. During the rotation of the shaft, the pressure plates expand outward or converge inward along the radial direction of the pressure ring. A self-locking structure is provided at the top of the shell, and a driving component is also provided at the top of the shell, connected to the self-locking structure. This invention, through the cooperation of the driving component and the self-locking structure, controls the rotation of the shaft inside the shell to form a self-locking mechanism. During the rotation of the shaft, the multiple pressure plates expand outward or converge inward along the radial direction of the pressure ring, ensuring that the forces exerted on the soil and rock by the multiple pressure plates are equal, avoiding situations where the soil and rock experience different forces, thereby obtaining more general and extensive measurement data.

The application provides a copper foil automatic detection tensile strength elongation device and system, and relates to the technical field of copper foil performance detection.The copper foil automatic detection tensile strength elongation device provided by the application comprises a workpiece table, a rotating table, an oven assembly, a cutting assembly, a grabbing assembly and a detection assembly are arranged on the workpiece table; a plurality of copper foil tables are arranged on the rotating table, the copper foil tables can be driven to rotate between a plurality of workstations by the rotating table; the grabbing assembly can grab copper foils, and the grabbing assembly can move between each workstation and each assembly.The application uses a machine instead of manual operation, avoids cutting and extrusion of the device on the hands of detection personnel, improves the safety of the device, uses automatic equipment instead of a large amount of repetitive labor, and reduces labor costs.

A material toughness testing apparatus includes a stylus having at least two cutting blades configured to engage with the sample and spaced apart to define a stretch passage therebetween and a stylus transport system configured to move the stylus along a path trajectory as the cutting blades cut the sample such that the sample is displaced on at least one side of the path trajectory. Each cutting blade has a blade dive surface and a blade lift surface that intersect to form a cutting edge configured to cut the sample along the path trajectory. Each blade dive surface and blade lift surface is configured to contact the sample when cutting the sample. The stylus is configured to separate the sample and configured to form a ligament in the stretch passage and to induce tension in the ligament due to opposing forces of the cutting blades and the sample.