103 results about "High strain" patented technology

The invention provides a display backboard stamping process optimization method and system, and relates to the technical field of process optimization. According to the method, multi-area differential mesh division is carried out on a plate finite element model, fine meshes are adopted for a high-strain small-curvature area and a high-strain area, rough meshes are adopted for a trimming allowance area, and medium meshes are adopted for other areas. The deformation behavior of the key area is accurately captured, and the reliability of simulation prediction is remarkably improved under the same computing resource. And then, reverse compensation iterative correction and rapid convergence are performed on the initial molded surface based on a springback prediction result to obtain an optimized molded surface model, and source control is directly performed for springback errors, so that the number of times and period of mold testing which traditionally depends on experience are greatly reduced. According to the method, through linkage of simulation and real-time sensing data, dynamic optimization and closed-loop control of the process window are achieved, and the forming quality and production stability of the display backboard are effectively improved.

A mechanical high-strain guide hammering system comprises a vertical guide frame and a heavy hammer, the vertical guide frame is of a rectangular frame structure with an opening in the lower end, a hydraulic winch is fixedly mounted at the upper end of the vertical guide frame, a lifting seat is slidably mounted in the vertical guide frame, and the hydraulic winch is connected with the lifting seat through a steel cable; the lower surface of the lifting seat is connected with a hydraulic unhooking hook; a lifting point is arranged on the upper surface of the heavy hammer, the heavy hammer is connected with the hydraulic unhooking hook through the lifting point, the hydraulic unhooking hook achieves releasing and locking of the heavy hammer through a control oil way, and the heavy hammer moves up and down along an inner cavity of the vertical guide frame. A hinge seat is arranged on the side face of the vertical guide frame body, and the vertical guide frame body is connected with a mechanical arm of the excavator through the hinge seat. According to the utility model, the defects in the prior art are overcome, the accurate positioning of the heavy hammer in the hammering process can be effectively ensured, the heavy hammer is suitable for different detection environments, the risk of manual intervention is greatly reduced, and the working efficiency and the safety are improved.

The invention discloses a deep-sea high-pressure multi-strain-rate load test device and an operation method, and relates to the technical field of deep-sea load tests.The deep-sea high-pressure multi-strain-rate load test device comprises a base, a containing structure used for containing a test piece is arranged on the base, and a low-strain-rate load loading device used for stretching the test piece is arranged on the base; a dynamic impact structure for performing high strain rate impact on a test piece is arranged on the base, a pressurizing device is arranged below the base, the pressurizing device is used for injecting water into the accommodating structure and pressurizing the accommodating structure, and the pressurizing device can inject water into the accommodating structure, so that the water pressure in the accommodating structure is increased, and the water pressure in the accommodating structure is increased to a deep sea high-pressure environment; the low-strain-rate load loading device can enable the test piece to be stretched in various low-strain-rate states, and the dynamic impact structure is matched to spread high-strain-rate impact to the test piece, so that the test piece can be subjected to a combined test in a deep sea environment.

The invention relates to the technical field of construction engineering and artificial intelligence, in particular to a high-strain test tower state monitoring method, which comprises the following steps: acquiring a high-strain test tower image; based on the high-strain test tower image, performing instance segmentation on the high-strain test tower structure by adopting deep learning to obtain an image after instance segmentation; based on the image obtained after instance segmentation, on a tower structure, a brightness normalization method based on a long-short-term memory mechanism is adopted to normalize the surface brightness of the tower, and an image obtained after brightness normalization is obtained; and acquiring an image sequence after brightness normalization, performing optical flow feature extraction by using a pyramid optical flow method based on the image sequence after brightness normalization, and monitoring the state of the high-strain test tower based on the extracted optical flow features. According to the invention, the external environment can be greatly reduced, and meanwhile, high-strain test tower state monitoring can be accurately realized.

This invention discloses a load testing device and method for high strain rate tensile testing. The device includes an elastic rod (1), strain gauges (2), a tensile testing machine (3), a clamp connector (4), and a data acquisition unit (5). One end of the elastic rod is fixed to the lower crossbeam (31) of the tensile testing machine, and one end of the specimen (6) is connected to the other end of the elastic rod through the clamp connector. The other end of the specimen is fixed to the upper crossbeam (32) of the tensile testing machine. Several strain gauges are spaced apart on the elastic rod, and the output ends of the strain gauges are connected to the data acquisition unit. Each strain gauge independently transmits its stress signal to the data acquisition unit. This invention can obtain ideal and reliable dynamic mechanical property data by decomposing the transmission and superposition of stress waves during material tensile testing at high strain rates, reducing the oscillation effect of load signals, obtaining the true stress loaded on the sample, and improving the accuracy of test results.

The present application relates to the technical field of ultra-high performance concrete, and particularly relates to a light sand modified ultra-high strain hardening ultra-high performance concrete. The light sand modified ultra-high strain hardening ultra-high performance concrete comprises the following raw materials in parts by mass: cementitious material 55-65 parts, fine aggregate 0-48 parts, light sand 0-5 parts, steel fiber 6-10 parts, and water 10 parts; the volume ratio of the fine aggregate to the light sand is 0-18:18-0, and the sum of the volume of the fine aggregate and the volume of the light sand is always the same. The present application improves the strain hardening grade of UHPC to more than 1.5 times, thereby obtaining an ultra-high strain hardening UHPC, which has a stronger crack width control ability compared with the traditional strain hardening type UHPC, and is particularly suitable for UHPC structure application in marine environment.

The application discloses a flexible strain sensor, a preparation method and a deep-sea equipment structure health monitoring system. The flexible strain sensor comprises a flexible packaging layer, a composite conductive network structure packaged in the flexible packaging layer, at least one first conductive layer and at least one second conductive layer, wherein the first conductive layer is a conductive layer with a compact connection structure after mechanical pressure treatment, the second conductive layer is a conductive layer with a loose stacking structure without mechanical pressure treatment, and a conductive part electrically connected with the composite conductive network structure and led out. The application realizes the unity of ultrahigh strain sensitivity and high signal stability through the synergistic mechanism of macroscopic cracks and network microcracks generated by the two types of conductive layers under strain, and simultaneously endows the sensor with excellent flexibility and conformal attachment capability, so that the sensor can accurately collect the small strain signals on the surface of the deep-sea equipment structure and is suitable for the monitoring of the health of the deep-sea equipment structure.

The application relates to a laser direct writing strain gauge and a preparation method and application thereof, and belongs to the technical field of strain measurement and sensors. The strain gauge comprises a carbonizable flexible substrate, a laser direct writing carbon piezoresistive material, an elastomer encapsulation layer and an electrical lead-out structure; the laser direct writing carbon piezoresistive material is obtained by laser direct writing on the carbonizable flexible substrate; the laser direct writing carbon piezoresistive material is supported by a flexible substrate layer left after carbonization; and the laser direct writing carbon piezoresistive material is a linear pattern formed by mutual connection of no less than two carbon dots or a planar pattern formed by arrangement of no less than four carbon dots. The strain gauge simultaneously realizes low temperature coefficient and high strain sensitivity, can be independently used as a self-supporting structure, can be integrated with an external sensing carrier, and is used for strain testing. The strain gauge is suitable for strain measurement requirements under various complex working conditions and has good engineering adaptability and application flexibility.

To improve the strain limit of a strain gauge.SOLUTION: The strain gauge has a base, a resistor formed on the base, and wiring formed on the base and connected to a terminal end portion of the resistor, wherein the wiring includes a first portion juxtaposed with the resistor with a gap in the grid width direction in a plan view, and, the wiring includes a first metal layer and a second metal layer laminated on the first metal layer, and the second metal layer in the first portion of the wiring protrudes toward a side where the resistive element is disposed in a grid direction as compared with an end portion of the gap.SELECTED DRAWING: Figure 1

The application relates to the technical field of stainless steel and discloses an ultra-low magnetic permeability engineering structure steel under a low-temperature environment and a manufacturing method thereof, the chemical components of the steel are as follows: C 0.01-0.03%, Si 0.25-0.45%, Mn 5.00-8.00%, Cr 20.0-25.0%, Ni 10-15% and N 0.3-0.5%. The manufacturing method is that a slab is heated and then subjected to high-strain-rate dynamic plastic deformation in a quick forging machine, and then is annealed after quick forging. The thickness of the steel plate is 20-80 mm, under a 4.2K ultra-low-temperature environment, the yield strength of the steel plate is above 1.4GPa, the fracture elongation is above 23%, the fracture toughness is above 180 MPa*m1 / 2, and the magnetic permeability is below 1.01. The application solves the problem that the coarse-grained low-magnetic stainless steel has low strength under an ultra-low-temperature environment and is difficult to meet engineering requirements, and the tensile plasticity can be obviously increased while the high strength is ensured, and the comprehensive performance is excellent.

This invention discloses a remotely operated hammer release device for high-strain testing, comprising an operating handle component, an electromagnetic component, a signal receiving device, a blocking rod component, a tension spring component, a rotating chuck component that engages with the blocking rod component, a lifting ring component connecting the control mechanism and the actuator, a connecting rod component, and a clamp component, all located on the upper side of the release device body. The operating handle component, electromagnetic component, and signal receiving device are arranged on the same side. One end of the blocking rod component is connected to the tension spring component, and the other end engages with a slot on the rotating chuck component. The rotating chuck component is located in the middle of the release device body and has two slots: one slot engages with one end of the blocking rod component, and the other slot engages with one end of the lifting ring component. This invention is easy to assemble and transfer, has good adaptability to the construction environment, is suitable for high-strain testing in various situations, effectively protects the safety of workers, and improves work efficiency.

The utility model relates to a refrigerant pipeline stress-strain monitoring system, air conditioning equipment and refrigeration equipment, the refrigerant pipeline stress-strain monitoring system comprises a fiber bragg grating monitoring assembly and a refrigerant pipeline, and the fiber bragg grating monitoring assembly comprises a strain monitoring assembly and a temperature monitoring assembly which are adjacently arranged; the strain monitoring assembly and the temperature monitoring assembly are arranged on the outer wall of the refrigerant pipeline in a contact mode. According to the refrigerant pipeline stress-strain monitoring system provided by the invention, the problem of cross sensitivity of strain and temperature in a fiber bragg grating sensor is solved through the strain monitoring assembly and the temperature monitoring assembly which are arranged adjacently, and the accuracy and reliability of measurement are improved through a temperature compensation or decoupling technology; the actual stress-strain value of the refrigerant pipeline is obtained; the method has the advantages of high strain sensitivity, high measurement precision and the like, and the measurement result is more accurate. As the monitoring position, close to the refrigerant pipeline, of the fiber bragg grating monitoring assembly is of an optical system structure, electric sparks are not generated, and potential safety hazards such as explosion are not generated.

The invention relates to the technical field of leakage detection, in particular to a high-strain ultralow-temperature leakage detection device, which comprises a stress loading assembly, a low-temperature loading assembly and a leakage detection assembly, and is characterized in that the stress loading assembly is used for applying tensile stress to a to-be-detected workpiece, and an upper cover plate and a lower cover plate are fixed by a fixing piece; the upper cover plate and the lower cover plate tightly abut against a to-be-detected workpiece, the first cavity and the third cavity can be filled with cold sources, the cold sources can cool the to-be-detected workpiece to a test temperature, so that the temperature of an actual working scene of the to-be-detected workpiece is simulated, and a pressure supply pump in the leak detection assembly supplies pressure to the second cavity. And a vacuum pump in the leakage detection assembly extracts gas in a fourth chamber, so that the leakage condition of the to-be-detected workpiece under the tensile stress and in a low-temperature state is detected. The stress loading assembly can apply different degrees of tensile stress to the to-be-detected workpiece, and the cold source can reduce the temperature of the to-be-detected workpiece to any different temperatures, so that the comprehensiveness of leakage detection of the to-be-detected workpiece is improved.

The invention discloses a device and a method for centering installation of a heavy hammer and a sensor for high strain detection, and relates to the technical field of pile foundation detection. The device comprises a heavy hammer centering subsystem and a sensor positioning and mounting subsystem. The heavy hammer centering subsystem achieves optical accurate centering of a heavy hammer and a pile center through a built-in laser indicator and a buffer. The sensor positioning and mounting subsystem determines the pile center through a cross stay wire, determines symmetrical mounting points through a measuring rope with scales, performs high-precision punching and positioning by means of a deformable mold with a gradienter, and ensures that force and acceleration sensors are symmetrically mounted at the same height. The method comprises the steps of pile center positioning, hole position marking, mold hole guiding, laser centering, hammering and the like. According to the invention, the problems of asymmetry and different heights of eccentric hammering of a heavy hammer and sensor installation in a traditional method are solved, the accuracy and reliability of high strain detection data are remarkably improved, and the device is simple, low in cost, high in adaptability and convenient to popularize and apply on site.

The application relates to the technical field of wire rod production, in particular to a production method of high-efficiency and energy-saving alloy tool steel wire rod, and production steps of the method comprise the following steps: (1) cogging; (2) heating; (3) rolling: adopting a finishing rolling unit to roll, the temperature of an intermediate blank entering the finishing rolling unit is 900-910 DEG C, the temperature of the intermediate blank leaving the finishing rolling unit is 900-920 DEG C, so that the difference between the temperature of the intermediate blank leaving the finishing rolling unit and the temperature of the intermediate blank entering the finishing rolling unit is less than or equal to 20 DEG C; (4) cooling; (5) packing, the temperature of entering and leaving the finishing rolling unit is controlled by the cooling water pressure between the finishing rolling unit racks, high-strain-rate large deformation rolling in a non-recrystallization zone increases the dislocation and substructure density in supercooled austenite, and the produced deformation storage energy.

To provide glass compositions with a high Young's modulus and high dimensional stability while having other advantageous properties and characteristics.SOLUTION: Substantially alkali free glasses are disclosed which can be used to produce substrates for flat panel display devices, e.g., active-matrix liquid crystal displays (AMLCDs). The glasses have high annealing temperatures and Young's modulus. Methods for producing substantially alkali free glasses using a downdraw process (e.g., a fusion process) are also disclosed.SELECTED DRAWING: Figure 5

This invention provides a metal wire forming device for manufacturing dish racks, relating to the field of metal wire drawing technology. It includes a frame, a guiding mechanism, a lubrication mechanism, a drum drawing mechanism, wire, and a coating mechanism. The guiding mechanism includes multiple fixed rollers mounted on one side of the top of the frame via rotating rods and movable rotating rollers on the other side. The fixed and rotating rollers are staggered to form a wire channel, through which the wire passes to the right and enters the coating mechanism. This solution ultimately achieves lubrication of the wire and the inner wall of the drawing die using lubricating oil during the wire drawing operation. The lubricating oil is liquid; after covering the wire surface, it forms a continuous and stable lubricating film, effectively isolating the wire from direct contact with the drawing die, reducing the coefficient of friction. Furthermore, the lubricating oil can fill the microscopic gaps between the drawing die and the material in real time as the wire deforms, adapting to high strain rate drawing processes.

The embodiment of the utility model provides a strain gauge pasting and positioning device, and relates to the technical field of test equipment. The strain gauge pasting and positioning device comprises a base assembly and a guiding and pasting assembly. The base assembly comprises a magnetic attraction base, a fixed base and a rotary base, the fixed base and the magnetic attraction base are fixedly installed, and the rotary base is rotatably installed on the fixed base; the guide pasting assembly comprises a guide sleeve, a guide rod, a guide key, a transparent back plate and a transparent bottom plate, the guide rod is sleeved with the guide sleeve, the guide sleeve and the guide rod are each provided with a guide groove, the guide key is arranged in the guide groove of the guide sleeve and the guide groove of the guide rod in a matched mode, the guide sleeve is installed on the rotating base, and the transparent back plate is installed on the guide rod; the transparent bottom plate is installed on the transparent back plate, and a strain gauge to be pasted is arranged on the surface of the transparent bottom plate. The strain gauge pasting and positioning device can achieve the technical effect of improving the pasting efficiency and the pasting and positioning precision of the strain gauge.

The invention belongs to the technical field of material science foundation, and discloses a single twinborn system dominated twinborn transmission probability prediction method. According to the method, aiming at the condition that a single twin system is started preferentially under specific texture and force field conditions, the uniqueness of the twin system is limited and activated, and a three-dimensional matrix expression system of specific twin system spatial orientation is constructed. And based on a judgment rule that twin crystal faces and twin directions of the two crystal grains are parallel, calculating the minimum orientation difference capable of realizing parallel twin systems among the crystal grains. According to the method, the twinborn orientation difference is provided as a key physical quantity for quantifying the twinborn transmission capability, and the regulation and control mechanism of single twinborn system activation on local stress redistribution is disclosed by eliminating the interference of a non-activated twinborn system. The method is applicable to a twin-dominated deformation system at low temperature or high strain rate, and provides a micromechanical basis for optimizing strain coordination at the grain boundary.

The invention discloses a liquid metal fiber stretchable strain sensor and a preparation method and application thereof, and relates to the technical field of stretchable strain sensors. A coaxial layered structure of an elastic fiber core, a PDA adhesion layer, an Ag seed layer, a Cu functional layer, a liquid metal (LM) conductive layer, an SEBS packaging layer and an inert electrode interface (MWCNT / SEBS-PEDOT: PSS) is adopted, and a liquid metal material is combined with a composite fiber structure, so that the electrical property stability and the response speed of the sensor in a high strain state can be remarkably improved; meanwhile, the chemical stability of the sensor in a wet, ion-containing or biological fluid environment is ensured, long-time stable work is ensured, and the wearable biological monitoring requirement is met. The structure of the sensor is optimized, the sensor can be better attached to the skin or soft tissue, the wearing comfort is enhanced, the stability of sensing signals is guaranteed, and the problems that an existing sensor is prone to falling off and poor in air permeability are solved.

The invention provides a cast ingot forging repair method and system based on multi-stage pressure-maintaining healing. The method comprises the following steps that in the forging process of a cast ingot, in at least one key healing pass, the total deformation of the pass is implemented in stages, a high-temperature pressure maintaining stage is arranged between the stages, and the high-temperature pressure maintaining stage comprises the steps that pressure is continuously applied to the cast ingot at the temperature larger than 1050 DEG C, and the pressure is maintained for 5-30 seconds. Metallurgy-grade welding of internal defects is realized by utilizing a rapid healing mechanism of a material under high temperature, high strain and continuous pressure, a defect interface is thoroughly eliminated, and the risk of defect reappearing is fundamentally eradicated.

The invention discloses a multi-dimensional force sensor, a stress state detection method and a robot finger, and belongs to the technical field of robot sensing. The strain matrix extends along a first plane formed by a first direction and a second direction; the strain matrix is provided with a strain amplification hole extending in the third direction; the strain sensor comprises a sensing base body and a sensing unit, the sensing base body is connected with the strain base body, and one opening of the strain amplification hole faces the sensing base body; the sensing unit is connected with the sensing base body and is arranged on one side, far away from the strain base body, of the sensing base body; in the third direction, at least part of the orthographic projection of the sensing unit penetrates through the strain amplification hole. The strain amplification hole is formed, macroscopic force is converted into local high strain, and the detection sensitivity of shear force and torque is improved.

The utility model belongs to the technical field of pile foundation testing, and discloses a foundation pile high strain testing device which comprises a fixing frame, the fixing frame is fixedly connected with a controller, two supporting columns are symmetrically fixed to the two sides of the fixing frame, scale marks and guide sliding grooves are formed in the supporting columns, and the supporting columns are fixedly connected with a plurality of climbing handrails which are evenly distributed. The supporting column is slidably connected with a limiting sleeve, the limiting sleeve and the supporting column are fixedly locked through a bolt, the supporting column and the fixing frame are jointly connected with a supporting platform, a penetrating hole is formed in the center of the supporting platform, the supporting platform is fixedly connected with a motor and a rotating wheel, the motor is electrically connected with the controller, and a traction rope is wound around an output shaft of the motor. The traction rope sequentially penetrates through the rotating wheel and the penetrating hole and then is connected with a clamping assembly, the clamping assembly is movably connected with a fixing ring, and the fixing ring is fixedly connected with a heavy hammer. According to the utility model, the problems that the heavy hammer falls off through knocking and cannot fall off automatically, the device is deviated due to knocking, and the heavy hammer cannot accurately strike the bottom detection device in the prior art are solved.

The present application relates to a kind of high-strength steel non-isothermal liquid nitrogen cooling deformation performance test method and testing device.High-strength steel non-isothermal liquid nitrogen cooling deformation performance test method, it is cooled to sample using liquid nitrogen jet, follow-up cooling, and carry out non-isothermal tensile test.The performance test method includes the following steps: S1, preliminary preparation;S2, high temperature heating;S3, non-isothermal stretching.The present application can obtain high-temperature hot forming limit under the condition of liquid nitrogen rapid cooling and high strain rate, can accurately capture the yield strength mutation and forming limit inflection point of material under the condition of rapid cooling, realize accurate prediction of high-temperature non-isothermal forming of sheet metal, while two sub-experiments are verified, by from microstructure to explore the influence of liquid nitrogen rapid cooling and high strain, strain rate on the change of organization before hot stamping quenching and pressure holding process of high-temperature sheet, finally explore the influence law of liquid nitrogen injection process on sheet forming quality.

The utility model relates to a pile foundation high strain detection device, which comprises a supporting seat comprising a main body, a guide rod and a plurality of limiting clamping grooves, the main body is arranged at the pile top of a to-be-detected pile, the guide rod is vertically and fixedly arranged at the center of the top surface of the main body, and the guide rod and the center of the pile top of the to-be-detected pile are located at the same position; the plurality of limiting clamping grooves are uniformly formed in the periphery of the main body, a limiting plate is detachably clamped in each limiting clamping groove, and the limiting plates abut against the to-be-detected pile; and the detection hammer is arranged right above the main body, and the center of the detection hammer is provided with a through hole for the guide rod to pass through. By means of the device, rapid centering and positioning of different pile diameters can be achieved.

A foldable electronic device may include a flexible display panel and a display cover layer that fold along a bend axis. The display cover layer may be formed from one or more glass layers. For example, a thin glass layer may form an outer surface of the display and may extend across the bend axis. A non-Newtonian material may be interposed between the glass layer and the display panel to help protect the display panel from damage when the glass layer is impacted by an external object or a drop event. The non-Newtonian layer may have a low modulus of elasticity at low strain rates (e.g., during folding and unfolding) and a high modulus of elasticity at high strain rates (e.g., when an object impacts the display) to prevent the cover glass from puncturing the underlying display layers.

The auxiliary device is installed at the bottom of a high-strain guide frame and comprises an upper frame, a lower frame, supporting legs and a reinforcing support, the upper frame and the lower frame are oppositely arranged up and down, the upper ends of the supporting legs are welded to the four corners of the bottom of the upper frame, the lower ends of the supporting legs are fixed to the lower frame, and the reinforcing support is fixed to the upper frame. A reinforcing support is arranged on the long edge side between the upper frame and the lower frame, an inlet is formed in the short edge side between the upper frame and the lower frame, the reinforcing support comprises X-shaped reinforcing ribs and a middle supporting frame, the middle supporting frame is a support with holes, the original stability of the high-strain guide frame is improved, and the guide frame is safer and more reliable. The height of the high-strain guide frame is increased, and then the hammering height of the heavy hammer is increased, so that the hammering energy coverage range is wider, and the device adapts to the conditions that the bearing capacity is higher and the hammering potential energy is higher.

The application discloses a kind of high strain hardening ability titanium alloy and preparation method.The titanium alloy is by the following components according to mass percentage: Al 5.5~6.5%, V 3.5~4.5%, Mo 1.5~2.5%, Fe 0.4~0.6%, Cr 0.4~0.6%, remainder is Ti and inevitable impurities;Wherein the sum of mass of Fe and Cr is 0.8~1.2%, and the mass ratio of Mo / (Fe+Cr) is 1.7~3.2.By introducing slow diffusion element Mo, synergistic effect with Fe, Cr, combined with near β phase transition region hot rolling and rapid cooling, metastable β phase is obtained.The metastable β phase can simultaneously start stress-induced α' martensitic phase transition, realize multiple plastic deformation mechanism synergy.Tensile strength ≥1125MPa, yield strength ≥712MPa, elongation ≥15.1%, realize the excellent match of high strength, high plasticity and high strain hardening ability.

The invention discloses a method for introducing high-density twin crystals into a tantalum-tungsten alloy, which is characterized in that the tantalum-tungsten alloy prepared by vacuum electron beam melting is selected as a raw material, and a high-density twin crystal structure is introduced by adopting a method of combining thermal mechanical treatment with multi-pass high-strain-rate impact, so that the tantalum-tungsten alloy with uniform high-density twin crystals is obtained. Thermal mechanical treatment is adopted to homogenize the structure, reduce the dislocation density and remove the machining deformation stress, then multi-pass high-strain-rate impact deformation is adopted to regulate and control the microstructure in the tantalum-tungsten alloy, a high-density and uniformly-distributed twin crystal structure is introduced into the tantalum-tungsten alloy, controllable preparation of the twin crystal density is achieved, and the preparation process is simple. And the method is reasonable in design, simple and efficient in process and wide in application range.