CN108982181B - Additive material high-throughput sample preparation method, characterization platform and characterization experiment method - Google Patents
Additive material high-throughput sample preparation method, characterization platform and characterization experiment method Download PDFInfo
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Abstract
The invention provides a preparation method, a characterization platform and a characterization experiment method of a high-throughput sample of an additive material, wherein the method comprises the following steps: receiving design data for a high throughput sample; the design data includes at least a gauge length segment of the design specimen; conveying a plurality of design samples to a set position according to a set moving speed; each design sample contains a specified elemental material; sintering the design sample through a heat source at a set position to obtain a high-flux sample; in the sintering process, each gauge length section of the design sample corresponds to the specified heat source power. By the method, measurement data of additive materials of different types can be obtained simultaneously, the workload and time of experiments are reduced, and the rapid screening and optimization of additive manufacturing materials are improved.
Description
Technical Field
The invention relates to the technical field of high-flux samples of additive materials, in particular to a preparation method, a characterization platform and a characterization experiment method of a high-flux sample of an additive material.
Background
With the development of scientific technology, advanced national defense and military equipment put forward higher and higher requirements on the comprehensive performance of materials, the additive manufacturing technology is known as a revolutionary low-cost, short-period, high-performance, shape/control integrated, green and digital manufacturing technology, the technology is expected to provide a new technology approach with rapidness, flexibility, low cost, high performance and short period for manufacturing large-scale difficult-to-process metal components in national defense and industrial major equipment, and the technology has huge development potential and broad development prospect in the manufacturing of future major equipment such as aviation, high-end, nuclear power, petrochemical industry, ships and the like.
However, the material composition, the heat source type, the scanning power, the scanning speed and the like in the additive manufacturing process all affect the structure and the performance of the material to a certain extent, and the change of the process parameters leads the material type obtained by additive manufacturing to be increased in a geometric progression and to be approximate to astronomical numbers. Although many different experimental tools have been developed and used in the field of materials to study the composition, tissue structure and mechanical properties of materials, in the conventional material research, only one characteristic parameter of one material can be obtained in one experiment, and if the conventional trial-and-error method is adopted to carry out experimental research on the obtained sample material, the workload is large. Even in the European and American countries with leading material calculation simulation technologies, due to the limitation of the current calculation capability, theoretical models and basic data, the accuracy of the calculation results of most of materials can not reach the level of the experimental results, only one characterization parameter of one material can be obtained in one test, the practical requirements are difficult to meet, the experimental time is long, and the requirements for rapid material screening and optimization are difficult to meet.
Disclosure of Invention
In view of this, the present invention provides an additive material high-throughput sample preparation method, a characterization platform, and a characterization experiment method, so as to obtain measurement data of different types of additive materials simultaneously, reduce workload and time of experiments, and improve rapid screening and optimization of additive manufacturing materials.
In a first aspect, embodiments of the present invention provide a method for preparing a high-throughput sample of an additive material, where the method is applied to an additive manufacturing apparatus, and the method includes: receiving design data for a high throughput sample; the design data includes at least a gauge length segment of the design specimen; conveying a plurality of design samples to a set position according to a set moving speed; each design sample contains a specified elemental material; sintering the design sample through a heat source at a set position to obtain a high-flux sample; in the sintering process, each gauge length section of the design sample corresponds to the specified heat source power.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the method further includes: gaps were preformed at each gauge length of the high throughput specimen.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where two notches are prefabricated for each gauge length segment, the two notches are located on the same cross section, the two notches are arranged oppositely, and each notch has a specified depth.
With reference to the first aspect, embodiments of the present invention provide a third possible implementation manner of the first aspect, wherein the heat source includes a laser heat source; the method comprises the following steps of sintering a design sample by a heat source, wherein the steps comprise: and sintering the design sample by a metal laser selective melting technology.
In a second aspect, the embodiment of the invention provides an additive material high-throughput sample characterization platform, which comprises an in-situ fatigue testing machine, an X-ray imaging device, an X-ray diffraction testing device, a strain measurement system, a thermal infrared imager and a main controller; the in-situ fatigue testing machine, the X-ray imaging device, the X-ray diffraction testing device, the strain measuring system and the thermal infrared imager are respectively in communication connection with the main controller; the in-situ fatigue testing machine is used for carrying out in-situ tensile or fatigue loading test on the high-flux sample so as to obtain mechanical property parameters of the high-flux sample; a high-throughput sample is obtained by the preparation method of any one of the above; the X-ray imaging device is used for collecting X-ray projection optical signals of the high-flux sample under the irradiation of X-rays in the test process so as to obtain the internal defect appearance and the three-dimensional space state of the high-flux sample; the X-ray diffraction testing device is used for acquiring X-ray diffraction map information of the high-flux sample under the irradiation of X-rays in the testing process so as to obtain a three-dimensional crystal structure and a stress state of the high-flux sample; the strain measurement system is used for collecting speckle fields of the high-flux sample before and after the test so as to obtain the appearance and deformation of the high-flux sample in a three-dimensional space; the thermal infrared imager is used for collecting the surface temperature of the high-flux sample in the test process; the main controller is used for respectively sending corresponding control signals to the in-situ fatigue testing machine, the X-ray imaging device, the X-ray diffraction testing device, the strain measurement system and the thermal infrared imager, receiving and storing collected data sent by the in-situ fatigue testing machine, the X-ray imaging device, the X-ray diffraction testing device, the strain measurement system and the thermal infrared imager, and outputting the collected data in a set format.
In combination with the second aspect, embodiments of the present invention provide a first possible implementation manner of the second aspect, where the X-ray imaging apparatus includes: the X-ray imaging device comprises an X-ray light source, an X-ray imaging detector and a light source objective table; the X-ray light source and the X-ray imaging detector are respectively connected with the main controller; the high-flux sample is arranged on the light source objective table; the X-ray light source is used for emitting X-rays to penetrate through the high-flux sample; the X-ray imaging detector is used for receiving and recording projection light signals of X-rays passing through the high-flux sample; the light source objective table is used for the linkage device to rotate 360 degrees, and 360-degree imaging of the high-flux sample is completed.
With reference to the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the X-ray diffraction testing apparatus includes: an X-ray light source and an X-ray diffraction detector; the X-ray light source and the X-ray diffraction detector are respectively connected with the main controller; the X-ray diffraction detector is arranged in the refraction direction of the X-ray; the X-ray light source is used for emitting X-rays to penetrate through the high-flux sample; and the X-ray diffraction detector is used for receiving and recording X-ray diffraction map information refracted by the additive material.
In combination with the second aspect, embodiments of the present invention provide a third possible implementation manner of the second aspect, wherein the strain measurement system includes a VIC-3D non-contact full-field strain test system.
In a third aspect, an embodiment of the present invention provides an additive material high-throughput sample characterization experiment method, where the method is applied to the above high-throughput sample characterization platform, and the method includes: loading a high-flux sample to be measured on a clamp of an in-situ fatigue testing machine; setting the loading force of the clamp to be zero, and collecting the measurement data of the high-flux sample; the initial measurement data comprises one or more of mechanical property parameters, X-ray projection optical signals, X-ray diffraction pattern information, speckle fields and surface temperature; fatigue loading is carried out on the high-flux sample through an in-situ fatigue testing machine, and the current measurement data of the high-flux sample is collected in the loading process until the high-flux sample breaks and fails.
With reference to the third aspect, an embodiment of the present invention provides a first possible implementation manner of the third aspect, where fatigue loading is performed on the high-throughput sample by an in-situ fatigue testing machine, and the step of acquiring current measurement data of the high-throughput sample during the loading process includes: collecting mechanical property parameters, speckle fields and surface temperature of a high-flux sample in real time in a fatigue loading process; and when the loading force reaches a specified loading force threshold value, acquiring X-ray projection light signals and X-ray diffraction pattern information of the high-flux sample.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a preparation method, a characterization platform and a characterization experiment method of a high-throughput sample of an additive material, wherein the method comprises the following steps: receiving design data for a high throughput sample; the design data includes at least a gauge length segment of the design specimen; conveying a plurality of design samples to a set position according to a set moving speed; each design sample contains a specified elemental material; sintering the design sample through a heat source at a set position to obtain a high-flux sample; in the sintering process, each gauge length section of the design sample corresponds to the specified heat source power. By the method, measurement data of additive materials of different types can be obtained simultaneously, the workload and time of experiments are reduced, and the rapid screening and optimization of additive manufacturing materials are improved.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for preparing a high-throughput sample of an additive material according to an embodiment of the present invention;
fig. 2 is a flow chart of another method for preparing a high-throughput sample of an additive material according to an embodiment of the present invention;
FIG. 3 is a front view of a high throughput sample provided by an embodiment of the present invention;
FIG. 4 is a top view of a high throughput sample preparation provided by an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a high throughput sample characterization platform according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another high throughput sample characterization platform according to embodiments of the present invention;
FIG. 7 is a flow chart of a high throughput sample characterization experiment method according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The synchrotron radiation light source has various characterization test functions, can provide high brightness and high space-time resolution which meet the rapid characterization of samples, has strong compatibility, and can meet the requirement of users for building a multi-technology platform. However, in the current material research based on the synchrotron radiation light source, only one characterization technology is generally adopted, and a single sample is often characterized and tested, so that the characterization capability of a large scientific device is not fully exerted. Therefore, a high-throughput experimental method suitable for an additive manufacturing material is urgently needed to be developed, the high-throughput experimental method is used for preparing a multi-process gradient additive material high-throughput sample, a high-throughput sample characterization platform is built based on a synchrotron radiation light source, high-throughput in-situ characterization of additive materials under different processes in the same experiment is realized, the internal law between the process and the structure and the performance of the materials is quickly searched, and the method is applied to quick screening and optimization of the additive manufacturing material.
Referring to fig. 1, a flow chart of a method for preparing a high-throughput sample of an additive material is shown; the method is applied to additive manufacturing equipment; the method comprises the following steps:
step S102, receiving design data of a high-flux sample;
the operator designs the high-flux sample in advance each time the high-flux sample is made, so that the high-flux sample can be better used and can be used to the maximum. The design data includes what shape of cross-section sample is selected for use, and also includes a gauge length segment for designing the sample, which can be divided into multiple parts for designing the gauge length segment for the high-throughput sample.
Step S104, conveying a plurality of design samples to a set position according to a set moving speed;
the additive manufacturing equipment prepares a plurality of high-flux samples each time, and when preparing the high-flux samples, the design samples are conveyed to a set position and scanned according to a set moving speed. It should be noted that the additive manufacturing apparatus may have a plurality of selectable moving speeds, and scan the design sample according to the required moving speed; each design sample is divided into a plurality of gauge length sections, and the element materials of the parallel sections corresponding to each marking section are different; each experiment may be performed by selecting the appropriate elemental material for each parallel segment, according to the operator's requirements.
Step S106, sintering the design sample at the set position through a heat source to obtain a high-flux sample;
the heat source comprises a light heat source, each design sample is provided with a plurality of scale distance sections, each scale distance section of the design sample corresponds to the appointed heat source power in the sintering process, and each scale distance section of the design sample is scanned at a set speed every time the heat source power is changed.
The embodiment of the invention provides a method for preparing a high-throughput sample of an additive material, which is applied to additive manufacturing equipment and comprises the following steps: receiving design data for a high throughput sample; the design data includes at least a gauge length segment of the design specimen; conveying a plurality of design samples to a set position according to a set moving speed; each design sample contains a specified elemental material; sintering the design sample through a heat source at a set position to obtain a high-flux sample; in the sintering process, each gauge length section of the design sample corresponds to the specified heat source power. By the method, measurement data of additive materials of different types can be obtained simultaneously, the workload and time of experiments are reduced, and the rapid screening and optimization of additive manufacturing materials are improved.
See fig. 2 for a flow chart of another method of additive material high throughput sample preparation; the method is implemented on the basis of the method shown in fig. 1, which is applied to an additive manufacturing apparatus; the method comprises the following steps:
step S202, receiving design data of a high-throughput sample;
in this embodiment, a Metal Laser Selective melting technique is taken as an example, and preferably, an Additive manufacturing technique that can also be applied to other heat source types is taken, for example, an electron Beam fuse deposition technique ebff (electron Beam free sputtering), a direct Metal powder Laser sintering technique dmls (direct Metal Laser sintering), an electron Beam Selective melting technique ebsm (electron Beam Selective melting), a Laser stereolithography technique lsf (Laser solid forming), an Arc Additive manufacturing technique waam (wide and Arc Additive manufacturing), and the like, and 9 high-throughput samples are manufactured on the same substrate, and a powder feeding type is selected as a powder spreading type, and preferably, the samples are rectangular cross-section samples, and may also be circular cross-section samples. Firstly, designing a rectangular cross-section sample, wherein an original gauge length section is designed into a parallel section, a parallel working section of the sample is equally divided into n sections (n is more than or equal to 2), preferably 3 sections, each section is manufactured by different process parameters, different colors in the figure represent different process parameter layers, and as shown in fig. 3, the front view of the high-throughput sample is shown; taking the example of dividing the high-throughput sample into 3 sections, the high-throughput sample is divided into an upper part, a middle part and a lower part, the different colors of each part represent different process parameters, and the design data is converted into a format readable by the laser additive manufacturing equipment.
Step S204, conveying a plurality of design samples to a set position according to a set moving speed;
step S206, sintering the design sample at a set position by a metal laser selective melting technology to obtain a high-flux sample;
for example, three types of metal powders A, B, C, which are different in metal element-containing component and particle diameter, are selected for additive manufacturing, powder a is placed in a powder storage chamber, and 9 high-throughput samples are prepared on the same substrate, as shown in fig. 4, which is a top view of the preparation of one high-throughput sample; the scanning power of the laser beam was set to P1, the lower portions of samples 1, 2, and 3 were prepared at scanning speeds V1, V2, and V3, the scanning power was changed to P2, the lower portions of samples 4, 5, and 6 were prepared at scanning speeds V1, V2, and V3, the scanning power was changed to P3, and the lower portions of samples 7, 8, and 9 were prepared at scanning speeds V1, V2, and V3, respectively. The replacement powder type was B, the scanning power of the laser was fixed to P1, the middle portions of samples 1, 2, and 3 were prepared at scanning speeds V1, V2, and V3, the scanning power was changed to P2, the middle portions of samples 4, 5, and 6 were prepared at scanning speeds V1, V2, and V3, the scanning power was changed to P3, and the middle portions of samples 7, 8, and 9 were prepared at scanning speeds V1, V2, and V3, respectively. The replacement powder type was C, the scanning power of the fixed laser was P1, the upper portions of samples 1, 2, and 3 were prepared at scanning speeds V1, V2, and V3, the scanning power was P2, the upper portions of samples 4, 5, and 6 were prepared at scanning speeds V1, V2, and V3, the scanning power was P3, and the upper portions of samples 7, 8, and 9 were prepared at scanning speeds V1, V2, and V3, respectively. Preferably, 3 working conditions are selected for scanning speed and power. Of course, when the test needs, the working conditions under different powers and speeds can be combined at will to achieve the purpose of completing a plurality of high-throughput samples on the same substrate.
Step S208, prefabricating gaps at each scale distance section of the high-flux sample;
preferably, two notches are prefabricated at the same cross section of the same process layer, each gauge length section is located on the same cross section, the two notches are arranged oppositely, each notch has a designated depth, the method for preferably prefabricating the notches is a laser etching technology, and the process parameters (scanning power, scanning speed and the like) and the components (metal powder granularity, element components and the like) of different height layers of each sample are different.
Referring to fig. 5, a schematic structural diagram of an additive material high-throughput sample characterization platform is shown, where the characterization platform includes an in-situ fatigue testing machine 50, an X-ray imaging device 51, an X-ray diffraction testing device 52, a strain measurement system 53, a thermal infrared imager 54, and a main controller 55;
the in-situ fatigue testing machine 50, the X-ray imaging device 51, the X-ray diffraction testing device 52, the strain measuring system 53 and the thermal infrared imager 54 are respectively in communication connection with a main controller 55;
the in-situ fatigue testing machine 50 is used for carrying out in-situ tensile or fatigue loading tests on the high-flux test sample so as to obtain mechanical property parameters of the high-flux test sample; the high-flux sample is obtained by the preparation method;
the X-ray imaging device 51 is used for collecting X-ray projection optical signals of the high-flux sample under the irradiation of X-rays in the test process so as to obtain the internal defect appearance and the three-dimensional space state of the high-flux sample;
the X-ray diffraction testing device 52 is used for acquiring X-ray diffraction pattern information of the high-flux sample under the irradiation of X-rays in the testing process so as to obtain a three-dimensional crystal structure and a stress state of the high-flux sample;
the strain measurement system 53 is used for collecting speckle fields of the high-flux sample before and after the test to obtain the appearance and deformation of the high-flux sample in a three-dimensional space;
the infrared thermal imager 54 is used for collecting the surface temperature of the high-flux sample in the test process;
the main controller 55 is configured to send corresponding control signals to the in-situ fatigue testing machine 50, the X-ray imaging device 51, the X-ray diffraction testing device 52, the strain measurement system 53, and the thermal infrared imager 54, receive and store collected data sent by the in-situ fatigue testing machine 50, the X-ray imaging device 51, the X-ray diffraction testing device 52, the strain measurement system 53, and the thermal infrared imager 54, and output the collected data in a set format.
The X-ray imaging apparatus includes: the X-ray imaging device comprises an X-ray light source, an X-ray imaging detector and a light source objective table; the X-ray light source and the X-ray imaging detector are respectively connected with the main controller; the high-flux sample is arranged on the light source objective table; the X-ray light source is used for emitting X-rays to penetrate through the high-flux sample; the X-ray imaging detector is used for receiving and recording projection light signals of X-rays passing through the high-flux sample; the light source objective table is used for the linkage device to rotate 360 degrees, and 360-degree imaging of the high-flux sample is completed.
The X-ray diffraction test device comprises: an X-ray light source and an X-ray diffraction detector; the X-ray light source and the X-ray diffraction detector are respectively connected with the main controller; the X-ray diffraction detector is arranged in the refraction direction of the X-ray; an X-ray source for emitting X-rays through the high-flux sample; and the X-ray diffraction detector is used for receiving and recording X-ray diffraction map information refracted by the additive material.
The strain measurement system comprises a VIC-3D non-contact full-field strain test system.
FIG. 6 is a schematic diagram of another high throughput sample characterization platform; the high-throughput sample characterization platform can also be called a high-throughput experiment platform schematic diagram; FIG. 6 further illustrates the connection and positional relationship of the components of the high throughput sample characterization platform; the specific description is as follows:
1. an in-situ fatigue testing machine. The in-situ fatigue testing machine is well compatible with the light source object carrying table, can rotate 360 degrees along with the light source object carrying rotating table, and can also rotate 360 degrees for a sample to keep the testing machine still. In the experiment process, the main controller controls the in-situ fatigue testing machine to carry out in-situ stretching or fatigue loading on the high-flux sample, so that the mechanical property parameters of the high-flux sample are obtained.
An X-ray imaging apparatus. The X-ray imaging device mainly comprises an X-ray light source, an X-ray imaging detector, a light source objective table and the like, wherein signal ends of the X-ray light source and the X-ray imaging detector are respectively in signal connection with a main controller, the resolution of the synchrotron radiation X-ray imaging technology reaches a nanometer level, in the process of loading a high-flux sample, the X-ray light source sends X-rays which penetrate through a high-flux sample material, and projection light signals of the X-rays which penetrate through the high-flux sample are received and recorded by the X-ray imaging detector. The light source objective table linkage device rotates 360 degrees to complete 360-degree imaging of the high-flux sample, the internal defect appearance and the three-dimensional space state of the additive material under different process parameters are obtained, and accurate three-dimensional representation is carried out on the initiation, expansion and fracture processes of microcracks in the sample.
An X-ray diffraction test apparatus. The X-ray diffraction testing device mainly comprises an X-ray light source and an X-ray diffraction detector, wherein a high-flux sample is arranged along the irradiation direction of the X-ray light source, X-ray light enters the high-flux sample and is refracted to generate diffraction stripe X-ray signals, and the X-ray diffraction detector is arranged along the direction of refracting the X-ray and receives and records X-ray diffraction pattern information refracted by a material. The three-dimensional crystal structure and the stress state inside the high-flux sample are characterized in real time in the experimental process, the internal organization structure and the residual stress state of the material additive under different process parameters are obtained, and the organization structure evolution inside the material in the loading process is tracked in situ.
VIC-3D non-contact full field strain measurement system. A digital image correlation technique DIC (digital image correlation) is adopted, speckle fields before and after deformation are shot for the high-flux sample in the experiment process, the appearance and deformation of the high-flux sample in a three-dimensional space are measured in an all-around mode, and full-field three-dimensional shape, displacement and strain data of the additive material under different process parameters are obtained.
5. Provided is a thermal infrared imager. The infrared thermal imaging technology has the characteristics of rapidness, intuition, accurate positioning, high thermal sensitivity, high spatial resolution and the like. In the test process, the thermal infrared imager is adopted to test the temperature change of the surface of the high-flux sample, the distribution trend of the surface temperature of the high-flux sample in the fracture process is obtained, the temperature evolution of the high-flux sample in the stretching and fatigue fracture process and the fatigue crack propagation process is recorded, the temperature evolution difference of the material additives under different process parameters is researched, and the fracture mechanism of the material additives can be deeply analyzed.
6. And a main controller. On one hand, the main controller is in signal connection with each equipment control system of the test platform and is used for receiving and sending control signals. On the other hand, the main controller is used for storing data acquired by each device of the high-throughput test platform, outputting the data in forms of tables, graphs and the like, and finally, effectively analyzing, organizing and presenting the data.
7. And (5) processing and outputting the computer data. The method is characterized in that the method comprises the steps of outputting a large amount of experimental data in forms of tables, graphs and the like by fully utilizing the data processing and analyzing functions of a computer, and effectively analyzing, organizing and presenting the obtained large amount of experimental data to obtain various characterization parameters of the laser additive material, such as organization structures, mechanical properties and the like, under different processes, and further rapidly screening and optimizing additive manufacturing process parameters.
In accordance with the above embodiments, fig. 7 shows a high throughput sample characterization experiment method, which is applied to the above high throughput sample characterization platform, and includes:
step S702, loading a high-flux sample to be measured onto a clamp of an in-situ fatigue testing machine;
step S704, setting the loading force of the clamp to be zero, and collecting the measurement data of the high-flux sample;
the initial measurement data includes one or more of mechanical property parameters, X-ray projection light signals, X-ray diffraction pattern information, speckle fields, and surface temperature.
Step S706, fatigue loading is carried out on the high-flux sample through an in-situ fatigue testing machine, current measurement data of the high-flux sample is collected in the loading process until the high-flux sample breaks and fails, and the method comprises the steps S708 and S710;
step S708, collecting mechanical property parameters, speckle fields and surface temperature of the high-flux sample in real time in the fatigue loading process;
and step S710, when the loading force reaches a specified loading force threshold value, acquiring X-ray projection optical signals and X-ray diffraction pattern information of the high-flux sample.
The in-situ fatigue test of the high-flux sample of the aluminum alloy manufactured by the additive manufacturing is taken as an example, and the high-flux test process is briefly described. Firstly, the normal operation of each device is determined. And loading the high-flux sample on a fatigue tester clamp, setting the loading force to be 0N, and controlling each test device to run by the main controller to finish high-flux characterization and data acquisition of the initial state of the sample. And then carrying out fatigue loading on the sample according to experimental requirements, carrying out real-time detection on the temperature change and the strain state of the sample through a thermal infrared imager and a full-field strain measurement system in the loading process, after the cycle is carried out for a certain number of times, stopping the loading, controlling an X-ray light source to emit X-rays, carrying out X-ray imaging and diffraction on the sample, representing the internal tissue structure, the residual stress, the defects and the crack morphology of the material, and finishing high-flux representation again. And then continuing loading, and circulating the steps until the test piece is broken and fails. In the whole fatigue fracture process of the high-flux sample, a series of material performance characterization parameters such as crack initiation and expansion, crack tip tissue structure evolution, stress/strain field and temperature evolution are obtained.
The embodiment of the invention provides a characterization experiment method for a high-throughput sample of an additive material, which comprises the following steps: receiving design data for a high throughput sample; the design data includes at least a gauge length segment of the design specimen; conveying a plurality of design samples to a set position according to a set moving speed; each design sample contains a specified elemental material; sintering the design sample through a heat source at a set position to obtain a high-flux sample; in the sintering process, each gauge length section of the design sample corresponds to the specified heat source power. By the method, measurement data of additive materials of different types can be obtained simultaneously, the workload and time of experiments are reduced, and the rapid screening and optimization of additive manufacturing materials are improved.
The additive material high-flux sample preparation method, the characterization platform and the characterization experiment method provided by the embodiment of the invention have the same technical characteristics as the additive material high-flux sample preparation method, the characterization platform and the characterization experiment method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The computer program product for performing the preparation method, the characterization platform, and the experimental method of the additive material high-throughput sample according to the embodiment of the present invention includes a computer-readable storage medium storing a nonvolatile program code executable by a processor, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, and will not be described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for preparing a high-throughput sample of an additive material, wherein the method is applied to an additive manufacturing device, and the method comprises the following steps:
receiving design data for a high throughput sample; the design data at least comprises a gauge length section of the design sample;
conveying a plurality of design samples to a set position according to a set moving speed; each of the design samples contains a specified elemental material;
sintering the design sample at the set position through a heat source to obtain a high-flux sample; and in the sintering process, each gauge length section of the design sample corresponds to the specified heat source power.
2. The method of claim 1, further comprising: notches were preformed at each gauge length section of the high throughput specimen.
3. The method of claim 2, wherein two notches are preformed in each gauge length segment, the two notches being located on the same cross-section, the two notches being disposed opposite each other, each notch having a specified depth.
4. The method of claim 1, wherein the heat source comprises a laser heat source; the step of sintering the design sample by a heat source includes:
and sintering the design sample by a metal laser selective melting technology.
5. The characterization platform is characterized by comprising an in-situ fatigue testing machine, an X-ray imaging device, an X-ray diffraction testing device, a strain measurement system, a thermal infrared imager and a main controller;
the in-situ fatigue testing machine, the X-ray imaging device, the X-ray diffraction testing device, the strain measuring system and the thermal infrared imager are respectively in communication connection with the main controller;
the in-situ fatigue testing machine is used for carrying out in-situ tensile or fatigue loading test on the high-flux sample so as to obtain mechanical property parameters of the high-flux sample; the high-throughput sample is obtained by the production method according to any one of claims 1 to 4;
the X-ray imaging device is used for collecting X-ray projection optical signals of the high-flux sample under the irradiation of X-rays in the test process so as to obtain the internal defect appearance and the three-dimensional space state of the high-flux sample;
the X-ray diffraction testing device is used for acquiring X-ray diffraction pattern information of the high-flux sample under the irradiation of X-rays in the testing process so as to obtain a three-dimensional crystal structure and a stress state of the high-flux sample;
the strain measurement system is used for collecting speckle fields of the high-flux sample before and after the test so as to obtain the appearance and deformation of the high-flux sample in a three-dimensional space;
the thermal infrared imager is used for collecting the surface temperature of the high-flux sample in the test process;
the main controller is used for respectively sending corresponding control signals to the in-situ fatigue testing machine, the X-ray imaging device, the X-ray diffraction testing device, the strain measurement system and the thermal infrared imager, receiving and storing collected data sent by the in-situ fatigue testing machine, the X-ray imaging device, the X-ray diffraction testing device, the strain measurement system and the thermal infrared imager, and outputting the collected data in a set format.
6. The characterization platform of claim 5, wherein the X-ray imaging device comprises: the X-ray imaging device comprises an X-ray light source, an X-ray imaging detector and a light source objective table;
the X-ray light source and the X-ray imaging detector are respectively connected with the main controller; the high-flux sample is arranged on the light source objective table;
the X-ray light source is used for emitting X-rays to pass through the high-flux sample;
the X-ray imaging detector is used for receiving and recording projection light signals of the X-rays passing through the high-flux sample;
and the light source objective table is used for rotating the linkage device for 360 degrees to complete the 360-degree imaging of the high-flux sample.
7. The characterization platform of claim 5, wherein the X-ray diffraction test device comprises: an X-ray light source and an X-ray diffraction detector;
the X-ray light source and the X-ray diffraction detector are respectively connected with the main controller; the X-ray diffraction detector is arranged in the refraction direction of the X-ray;
the X-ray light source is used for emitting X-rays to pass through the high-flux sample;
the X-ray diffraction detector is used for receiving and recording X-ray diffraction pattern information refracted by the additive material.
8. The characterization platform of claim 5, wherein the strain measurement system comprises a VIC-3D non-contact full field strain test system.
9. An additive material high-throughput sample characterization experiment method applied to the high-throughput sample characterization platform according to any one of claims 5 to 8, wherein the method comprises the following steps:
loading a high-flux sample to be measured on a clamp of an in-situ fatigue testing machine;
setting the loading force of the clamp to be zero, and collecting the measurement data of the high-flux sample; the initial measurement data includes one or more of mechanical property parameters, X-ray projection light signals, X-ray diffraction pattern information, speckle fields, and surface temperature;
and carrying out fatigue loading on the high-flux test sample through the in-situ fatigue testing machine, and acquiring current measurement data of the high-flux test sample in the loading process until the high-flux test sample breaks and fails.
10. The method of claim 9, wherein said step of fatigue loading said high-throughput specimen by said in-situ fatigue testing machine, and acquiring current measurement data of said high-throughput specimen during said loading step comprises:
collecting mechanical property parameters, speckle fields and surface temperature of the high-flux sample in real time in a fatigue loading process;
and when the loading force reaches a specified loading force threshold value, acquiring X-ray projection light signals and X-ray diffraction pattern information of the high-flux sample.
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| CN111203537B (en) * | 2020-04-22 | 2020-07-28 | 中国航发上海商用航空发动机制造有限责任公司 | Method for prefabricating fusion defect by controlling L MD process |
| CN111829868B (en) * | 2020-07-13 | 2023-07-14 | 清华大学 | Research method for high-flux metal additive manufacturing process parameters |
| CN112881435A (en) * | 2021-01-08 | 2021-06-01 | 上海大学 | Device and method for in-situ observation of structural evolution of laser additive manufacturing molten pool |
| CN114878777B (en) * | 2022-07-12 | 2022-10-14 | 北京煜鼎增材制造研究院有限公司 | High-throughput preparation and characterization system and method for high-temperature alloy based on additive manufacturing |
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| CN107356479B (en) * | 2017-07-12 | 2020-03-17 | 南方科技大学 | Metal material tensile property evaluation method based on selective laser melting technology |
| CN107900334B (en) * | 2017-11-17 | 2020-02-21 | 北京科技大学 | Laser high-flux preparation method based on array type powder distribution |
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