A printing method of a face-centered cubic lattice optimized selectively and locally

Abstract

The present application provides a printing method for a face-centered cubic lattice with selective local optimization. The method includes obtaining a lattice structure model of a target printed object. Simulating the stress concentration path of the lattice structure model from the elastic deformation state to the yield state. Decomposing the load-bearing struts in the lattice structure model into non-primary load-bearing struts and primary load-bearing struts according to the stress concentration path. Performing variable-diameter optimization processing on at least part of the structure of the primary load-bearing struts to obtain optimized primary load-bearing struts. Respectively slicing the non-primary load-bearing struts and the optimized primary load-bearing struts to obtain multiple layers of slices, and performing layer-by-layer printing on the multiple layers of slices to obtain the target printed object. The method provided by the present application can optimize and improve the structural strength of the lattice structure, thereby enhancing the anti-deformation ability of the target printed object during application and reducing the risk of cracks or fractures occurring in the target printed object.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology. Specifically, it relates to a printing method for a face-centered cubic lattice with selective local optimization. Background Art

[0002] The lightweight design of materials is an unchanging design goal for high-end mechanical components such as spacecraft. Among them, the lattice structure formed by additive manufacturing provides a solution for the lightweight of spacecraft. In the face of the complex working conditions of aircraft, the lattice structure needs to play a safe and reliable role in diverse service environments.

[0003] Although existing technologies such as cell hybridization and innovative cell topology can improve the safety performance of the lattice structure, due to the introduction of too many geometric features, large-angle cantilever structures are likely to appear, which will lead to difficulties in forming the lattice structure and make it difficult to be applied in practical applications. Summary of the Invention

[0004] This application provides a printing method for a face-centered cubic lattice with selective local optimization, which can optimize and improve the structural strength of the lattice structure.

[0005] Specifically, this application is implemented through the following technical solutions:

[0006] This application provides a printing method for a face-centered cubic lattice with selective local optimization, including:

[0007] Obtain the lattice structure model of the target printed object;

[0008] Simulate the stress concentration path of the lattice structure model from the elastic deformation state to the yield state; decompose the load-bearing struts in the lattice structure model into non-main load-bearing struts and main load-bearing struts according to the stress concentration path;

[0009] Perform variable diameter optimization on at least part of the structure of the main load-bearing struts to obtain optimized main load-bearing struts;

[0010] Perform slicing on the non-main load-bearing struts and the optimized main load-bearing struts respectively to obtain multiple slices, and print the multiple slices layer by layer to obtain the target printed object.

[0011] Optionally, the stress concentration path includes a stress concentration starting position and a stress concentration ending position;

[0012] The main load-bearing struts include a node part located at the stress concentration starting position and an intermediate part located at the stress concentration ending position;

[0013] Performing diameter variation optimization on at least part of the structure of the main load-bearing strut includes: optimizing the diameter of the node part and / or the middle part so that the diameter of the node part is not equal to the diameter of the middle part.

[0014] Optionally, the main load-bearing strut further includes a transition part located between the node part and the middle part;

[0015] Performing diameter variation optimization on at least part of the structure of the main load-bearing strut further includes: optimizing the diameter of the transition part so that the transition part is formed into a tapered section gradually extending from the node part to the middle part.

[0016] Optionally, the diameter of the non-main load-bearing strut is a constant diameter;

[0017] Optimizing the diameter of the node part and / or the middle part includes: performing a diameter expansion process on one of the node part and the middle part, and keeping the other one with the same diameter as the non-main load-bearing strut.

[0018] Optionally, the diameter of one of the node part and the middle part is d1, and the diameter of the other one is d2, satisfying d1 = (2 - 4)d2.

[0019] Optionally, performing layer-by-layer printing on the multi-layer slices includes:

[0020] Adopting laser process parameters with a laser power of 220 - 240W, a scanning pitch of 80 - 100μm, and a scanning speed of 800 - 900mm / s to perform layer-by-layer printing on the multi-layer slices from bottom to top.

[0021] Optionally, before performing layer-by-layer printing on the multi-layer slices, it further includes:

[0022] Providing aluminum-magnesium-scandium-zirconium metal powder with a powder layer thickness of 30 - 35μm at each slice layer, and the aluminum-magnesium-scandium-zirconium metal powder includes the following elements by weight percentage: Mg is 4 - 4.2%, Si is 0.6 - 0.62%, Zr is 0.2 - 0.22%, Fe is 0 - 0.02%, and the balance is Al.

[0023] On the other hand, the present application provides a 3D printing system, including:

[0024] A lattice structure model acquisition module for acquiring the lattice structure model of the target printed object;

[0025] A lattice structure model simulation and decomposition module for simulating the stress concentration path of the lattice structure model from the elastic deformation state to the yield state; decomposing the load-bearing struts in the lattice structure model into non-main load-bearing struts and main load-bearing struts according to the stress concentration path;

[0026] An optimization processing module for performing diameter variation optimization processing on at least part of the structure of the main load-bearing strut to obtain an optimized main load-bearing strut;

[0027] A printing module for performing slicing processing on the non-main load-bearing struts and the optimized main load-bearing strut respectively to obtain multiple layers of slices, and performing layer-by-layer printing on the multiple layers of slices to obtain the target printed object.

[0028] On the other hand, the present application also provides a storage medium on which a computer program is stored, and when the computer program runs, it executes the printing method of the selectively locally optimized face-centered cubic lattice as described in any one of the above.

[0029] On the other hand, the present application also provides an electronic device, including a memory and a processor, where the memory is used to store computer instructions; the processor is used to run the computer instructions to execute the printing method of the selectively locally optimized face-centered cubic lattice as described in any one of the above.

[0030] The technical solution provided by the present application can achieve the following beneficial effects:

[0031] The present application provides a printing method of a selectively locally optimized face-centered cubic lattice, which can optimize and improve the structural strength of the lattice structure, thereby enhancing the anti-deformation ability of the target printed object during application and reducing the risk of cracks or fractures occurring in the target printed object. Description of the Drawings

[0032] Figure 1 is a schematic flow chart of a printing method of a selectively locally optimized face-centered cubic lattice shown in an exemplary embodiment of the present application.

[0033] Figure 2 is a schematic diagram of a conventional rod-based lattice structure of a face-centered cubic shown in an exemplary embodiment of the present application.

[0034] Among them, Fig. (2-a) is a schematic diagram of a model of a conventional rod-based lattice structure of a face-centered cubic; Fig. (2-b) is a stress concentration distribution diagram of a conventional rod-based lattice structure of a face-centered cubic in an elastic deformation state; Fig. (2-c) is a stress concentration distribution diagram of a conventional rod-based lattice structure of a face-centered cubic in a yield state.

[0035] Figure 3 is a schematic diagram of an optimized lattice structure shown in an exemplary embodiment of the present application.

[0036] Among them, Figure (3-a) is a schematic diagram of a lattice structure obtained by expanding the diameter of the middle part, i.e., the edge center, of the main load-bearing strut; Figure (3-b) is a schematic diagram of a lattice structure obtained by expanding the diameter of the node part of the main load-bearing strut.

[0037] Figure 4 is the stress-strain curve of the lattice quasi-static compression process obtained from a comparative experiment of the existing conventional face-centered cubic rod-based lattice structure, the lattice structure obtained by expanding the diameter of the middle part, i.e., the edge center, of the main load-bearing strut, and the lattice structure obtained by expanding the diameter of the node part of the main load-bearing strut shown in an exemplary embodiment of the present application.

[0038] Figure 5 is the lattice deformation and failure diagram under different strains obtained from a comparative experiment of the existing conventional face-centered cubic rod-based lattice structure, the lattice structure obtained by expanding the diameter of the middle part, i.e., the edge center, of the main load-bearing strut, and the lattice structure obtained by expanding the diameter of the node part of the main load-bearing strut shown in an exemplary embodiment of the present application. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments (or "implementation manners") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0040] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), then such terms are only used to explain the relative positional relationships and motion conditions between components in a specific posture (as shown in the accompanying drawings); if this specific posture changes, then the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0041] Please refer to Figure 1 , the present application provides a printing method for a face-centered cubic lattice with selective local optimization, including:

[0042] S1: Obtain the lattice structure model of the target printed object. Exemplarily, the target printed object can be a local or integral component of any high-end machinery in a spacecraft, such as including but not limited to an engine. Of course, in other examples, the target printed object can also be a local or integral component in other mechanical fields other than the spacecraft field.

[0043] The above lattice structure model refers to a spatial framework model formed by multiple regular or irregular geometric units (i.e., unit cells) arranged according to a specific topology, and is widely used in the fields of materials science and additive manufacturing (3D printing). Exemplarily, the lattice structure model can be a face-centered cubic lattice structure model, but is not limited thereto. Among them, the lattice structure model can be constructed using existing 3D drawing software such as, but not limited to, UG (Unigraphics NX) software, and will not be elaborated here.

[0044] S2: Simulate the stress concentration path of the lattice structure model from the elastic deformation state to the yield state; decompose the load-bearing struts in the lattice structure model into non-primary load-bearing struts and primary load-bearing struts according to the stress concentration path.

[0045] Exemplarily, as Figure 2 shown in -a, in the lattice structure model, the lattice structure model composed of multiple load-bearing struts belongs to the truss lattice structure model. By using existing mathematical simulation methods such as, but not limited to, the finite element analysis method to conduct a static simulation analysis on the truss lattice structure model, simulate the propagation route of the stress along certain specific geometric features of the truss lattice structure model under the compression state of specific load conditions, and obtain the stress concentration path of the truss lattice structure model from the elastic deformation state to the yield state. Among them, the stress concentration path of the truss lattice structure model in the elastic deformation state at 2% strain is as Figure 2 shown in -b, and the stress concentration path of the truss lattice structure model in the yield state is as Figure 2 shown in -c. Decompose the load-bearing struts in the truss lattice structure model into non-primary load-bearing struts 12 and primary load-bearing struts 11 according to the obtained stress concentration path. Among them, the non-primary load-bearing struts 12 are arranged in a cross shape, and the primary load-bearing struts 11 are arranged vertically, but are not limited thereto.

[0046] The above elastic deformation state refers to a reversible elastic deformation that occurs when a material is subjected to an external force. The above yield state refers to when the stress applied to the material reaches a certain yield strength, i.e., the critical value, the material begins to undergo irreversible plastic deformation.

[0047] S3: Perform a variable diameter optimization process on at least part of the structure of the primary load-bearing strut to obtain an optimized primary load-bearing strut.

[0048] Please refer to Figure 2 , in the existing lattice structure model, the diameters of the primary load-bearing strut 11 and the non-primary load-bearing strut 12 are the same. When both the primary load-bearing strut 11 and the non-primary load-bearing strut 12 adopt the same and constant diameter design, in the elastic deformation state, it will cause a large stress concentration at the connection nodes of the primary load-bearing strut 11 and the non-primary load-bearing strut 12 (as Figure 2-b orange-yellow area), while in the yield state, the stress concentration will be transferred from the position of the main bearing support 11 close to the connection node to the middle part of the main bearing support 11 (as shown in FIG. Figure 2 -c shown in red).

[0049] The present application can disperse the stress concentration of the main bearing pillar 11 and change the propagation path of the stress concentration by performing diameter-changing optimization processing on at least part of the structure of the main bearing pillar 11. By performing targeted structural optimization on the main bearing pillar 11, the strength control requirements of the target printed object can be met. At the same time, the initial structural characteristics of the non-main bearing pillar 12 can be retained as much as possible, thereby ensuring the convenience of printing processing and ensuring the high-quality forming of the high-performance dot matrix structure.

[0050] S4: Slicing the non-main bearing pillar and the optimized main bearing pillar separately to obtain multi-layer slices, and printing the multi-layer slices layer by layer to obtain the target printed object.

[0051] Exemplarily, printing can be performed using a process including but not limited to L-PBF additive manufacturing to obtain a complete target printed object formed by a combination of a main load-bearing pillar region and a non-main load-bearing pillar region, wherein the combination of the main load-bearing pillar region and the non-main load-bearing pillar region has no obvious dividing line, and during the layer-by-layer printing process, the main load-bearing pillar region and the non-main load-bearing pillar region are tightly combined.

[0052] The above-mentioned layer-by-layer printing refers to providing a first layer of printing material powder on the operating table of the 3D printing device and sintering it into a preset pattern with a laser. Then, a second layer of printing material powder is provided on top of the first layer and sintered into a preset pattern with a laser. The above-mentioned printing operation is repeated until the printing of the main bearing support area and the non-main bearing support area is completed to form a complete target printed object.

[0053] The above method provided in the present application can optimize and improve the structural strength of the dot matrix structure while achieving a lightweight design, thereby enhancing the deformation resistance of the target printed object during the application process and reducing the risk of cracks or breakage of the target printed object.

[0054] In one embodiment, the stress concentration path includes a stress concentration starting position and a stress concentration ending position. Figure 3 The main bearing support 11 includes a node portion 111 located at the starting position of the stress concentration, and a middle portion 112 located at the ending position of the stress concentration.

[0055] In the above step S3, the process of optimizing the diameter of at least part of the main load-bearing pillar 11 includes: optimizing the diameter of the node part 111 and / or the middle part 112 so that the diameter of the node part 111 is not equal to the diameter of the middle part 112. Thus, the diameters of the node part 111 and / or the middle part 112 can be optimized differently according to the different usage requirements of the target printed object under different working conditions.

[0056] Exemplarily, as Figure 3 shown in -a, the diameter of the node part 111 is smaller than the diameter of the middle part 112. In other examples, as Figure 3 shown in -b, the diameter of the node part 111 is larger than the diameter of the middle part 112. Specifically, it can be appropriately selected according to the specific structural strength requirements of the target printed object.

[0057] Please continue to refer to Figure 3 , in one embodiment, the main load-bearing pillar 11 further includes a transition part 113, and the transition part 113 is located between the node part 111 and the middle part 112.

[0058] In the above step S3, the process of optimizing the diameter of at least part of the main load-bearing pillar 11 further includes: optimizing the diameter of the transition part 113 so that the transition part 113 is formed into a tapered section that gradually extends from the node part 111 to the middle part 112.

[0059] The tapered section refers to a frustum of a cone structure formed by the diameter of the transition part 113 changing uniformly from the node part 111 to the middle part 112. By designing the transition part 113 located between the node part 111 and the middle part 112 as a tapered section with a uniformly changing diameter, the stress concentration caused by sudden shape changes can be reduced.

[0060] Please continue to refer to Figure 3 , in one embodiment, the diameter of the non-main load-bearing pillar 12 is a constant diameter. The optimizing the diameter of the node part 111 and / or the middle part 112 includes: performing a diameter expansion process on one of the node part 111 and the middle part 112, and the other one remains the same diameter as the non-main load-bearing pillar 12. Exemplarily, as Figure 3 shown in -a, the diameter of the node part 111 is smaller than the diameter of the middle part 112, and the diameter of the node part 111 is the same as the diameter of the non-main load-bearing pillar 12. In other examples, as Figure 3As shown in Fig. -b, the diameter of the node part 111 is greater than that of the middle part 112, and the diameter of the middle part 112 is the same as that of the non-main load-bearing strut 12. Thus, the original structural features of the non-main load-bearing strut 12 are retained, ensuring the convenience of printing and processing to ensure the high-quality forming of the high-performance lattice structure.

[0061] Of course, in other embodiments, the diameter of one of the node part 111 and the middle part 112 can be reduced according to the actual usage requirements of the target printed object.

[0062] It should be noted that Figure 3 -a and Figure 3 As shown by the red frame in Fig. -a and Fig. -b, it is an enlarged view of the structure of a partial main load-bearing strut of a unit cell in the lattice structure. The main load-bearing strut 11 formed by splicing four unit cells together has a volume four times that of a partial main load-bearing strut of a single unit cell.

[0063] Please refer to Figure 4 , using the existing conventional face-centered cubic rod-based lattice structure model as shown in Figure 2 , the diameters of its main load-bearing struts and non-main load-bearing struts are the same, and it has a relatively high stress at 10% strain. While using the edge-centered optimized lattice as shown in Figure 3 -a, that is, the diameter of the node part is smaller than that of the middle part, and the diameter of the node part is the same as that of the non-main load-bearing strut, and it has a lower stress at 10% strain. Using the node-centered optimized lattice as shown in Figure 3 -b, that is, the diameter of the node part is greater than that of the middle part, and the diameter of the middle part is the same as that of the non-main load-bearing strut, and it also has a lower stress at 10% strain.

[0064] As shown in Figure 5 , using the existing conventional face-centered cubic rod-based lattice structure model as shown in Figure 2 , the diameters of its main load-bearing struts and non-main load-bearing struts are the same, and under different strains, buckling, shear failure, and plastic deformation occur in the main load-bearing struts. While using the edge-centered optimized lattice as shown in Figure 3 -a, that is, the diameter of the node part is smaller than that of the middle part, and the diameter of the node part is the same as that of the non-main load-bearing strut, and under different strains, the main load-bearing struts all show good structural stability. Using the node-centered optimized lattice as shown in Figure 3 -b, that is, the diameter of the node part is greater than that of the middle part, and the diameter of the middle part is the same as that of the non-main load-bearing strut, and only slight shear failure occurs at 15% strain. Compared with the existing conventional face-centered cubic rod-based lattice structure model, the strength of the main load-bearing struts has also been further improved.

[0065] In one embodiment, the diameter of one of the node part and the middle part is d1, and the diameter of the other is d2, satisfying d1 = (2 - 4)d2. The specific strength of the lattice structure depends on the volume fraction and the maximum bearing capacity of the lattice structure. When the cross-sectional radius of the middle part of the main load-bearing strut, i.e., the edge middle part, increases, the maximum bearing capacity of the lattice structure will increase. However, it is necessary to consider the increase in the volume fraction of the lattice structure at the same time. When the cross-sectional radius of the middle part of the main load-bearing strut, i.e., the edge middle part, increases beyond a certain critical value, the degree of increase in the maximum bearing capacity will be lower than the degree of increase in the volume fraction, which will instead cause the specific strength of the lattice structure to decrease. Therefore, in this application, the diameters of the node part and the middle part are limited within the above range, so that while the lattice structure is lightened, the maximum bearing capacity per unit volume of the lattice structure can also be achieved.

[0066] Exemplarily, as Figure 3 shown in -a, taking the side length dimension of each lattice cell as 8 mm, and the number of cells in each direction (i.e., the x-axis direction, the y-axis direction, and the z-axis direction) being 4, and taking the lattice structure of 32 mm × 32 mm × 32 mm obtained by optimizing and printing using the method of the present disclosure as an example:

[0067] The side length of each cell, that is, the length L of the main load-bearing strut, is 8 mm, the diameter d of the non-main load-bearing strut is 0.8 mm, the angle between the non-main load-bearing strut and the horizontal plane is 45°, and the diameter d1 of the node part = d, then d1 max =(L / 2)-(d / ), that is, d1 max is approximately 3.43 mm. Thus, when achieving the maximum bearing capacity per unit volume of the lattice structure, interference with the non-main load-bearing struts can be avoided as much as possible.

[0068] In one embodiment, the layer-by-layer printing of the multi-layer slices includes: using laser process parameters with a laser power of 220 - 240 W, a scanning pitch of 80 - 100 μm, and a scanning speed of 800 - 900 mm / s to perform layer-by-layer printing on the multi-layer slices from bottom to top. Thus, a target printed object with better structure can be printed.

[0069] In one embodiment, before the layer-by-layer printing of the multi-layer slices, it further includes: providing aluminum-magnesium-scandium-zirconium metal powder with a powder layer thickness of 30 - 35 μm at each slice layer. The aluminum-magnesium-scandium-zirconium metal powder includes the following elements by weight percentage: Mg is 4 - 4.2%, Si is 0.6 - 0.62%, Zr is 0.2 - 0.22%, Fe is 0 - 0.02%, and the balance is Al.

[0070] In one embodiment, the present application provides a 3D printing system, including:

[0071] A dot matrix structure model acquisition module, configured to acquire a dot matrix structure model of a target printed object;

[0072] A dot matrix structure model simulation and decomposition module, configured to simulate a stress concentration path of the dot matrix structure model from an elastic deformation state to a yield state; decompose load-bearing struts in the dot matrix structure model into non-primary load-bearing struts and primary load-bearing struts according to the stress concentration path;

[0073] An optimization processing module, configured to perform a diameter-changing optimization process on at least part of the structure of the primary load-bearing struts to obtain optimized primary load-bearing struts;

[0074] A printing module, configured to perform slicing processing on the non-primary load-bearing struts and the optimized primary load-bearing struts respectively to obtain multiple layers of slices, and perform layer-by-layer printing on the multiple layers of slices to obtain the target printed object.

[0075] In one embodiment, the present application provides a storage medium, on which a computer program is stored, and when the computer program runs, it executes the printing method of the face-centered cubic lattice with selective local optimization as described in any one of the above. Among them, the storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media.

[0076] In one embodiment, the present application provides an electronic device, including a memory and a processor, where the memory is used to store computer instructions; the processor is used to run the computer instructions to execute the printing method of the face-centered cubic lattice with selective local optimization as described in any one of the above.

[0077] The memory can be a ROM (Read Only Memory), a RAM (Random Access Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory), or a magnetic disk storage medium.

[0078] The processor may be a CPU (Central Processing Unit), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0079] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the exact structures described in the above embodiments and shown in the drawings; any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of protection of this application.

Claims

1. A method for printing a face-centered cubic dot matrix by selective local optimization, characterized in that: include: Obtaining a dot matrix structure model of a target printed object; Simulating the stress concentration path of the lattice structure model from the elastic deformation state to the yield state; The stress concentration path includes a stress concentration starting position and a stress concentration ending position; Decomposing the bearing pillars in the lattice structure model into non-main bearing pillars and main bearing pillars according to the stress concentration path; the main bearing pillars include a node portion located at the starting position of the stress concentration and a middle portion located at the ending position of the stress concentration; Performing diameter-variable optimization processing on at least a portion of the structure of the main bearing pillar, optimizing the diameter of the node portion and / or the middle portion, so that the diameter of the node portion is not equal to the diameter of the middle portion; To obtain the optimized main bearing pillar; The non-main load-bearing pillar and the optimized main load-bearing pillar are sliced ​​separately to obtain multi-layer slices, and the multi-layer slices are printed layer by layer to obtain the target printed object.

2. The method for printing a face-centered cubic lattice through selective local optimization according to claim 1, characterized in that: The main load-bearing strut also includes a transition portion, the transition portion being located between the node portion and the intermediate portion; The variable diameter optimization treatment of at least a portion of the structure of the main bearing support further includes: optimizing the diameter of the transition portion so that the transition portion is formed into a tapered section that gradually extends from the node portion to the middle portion.

3. The method for printing a face-centered cubic lattice through selective local optimization according to claim 1, characterized in that: The diameter of the non-main load-bearing pillar is a constant diameter; Optimizing the diameter of the node portion and / or the middle portion includes: performing a diameter expansion process on one of the node portion and the middle portion, and maintaining the other portion with the same diameter as the non-main load-bearing strut.

4. The method for printing a face-centered cubic lattice through selective local optimization according to claim 3, characterized in that: The diameter of one of the node portion and the middle portion is d1, and the diameter of the other is d2, satisfying d1=(2-4)d2.

5. The method for printing a face-centered cubic lattice through selective local optimization according to claim 1, characterized in that: Printing the multi-layer slices layer by layer includes: The multi-layer slices are printed layer by layer from bottom to top using laser process parameters of laser power of 220-240 W, scanning spacing of 80-100 μm, and scanning speed of 800-900 mm / s.

6. The method for printing a face-centered cubic lattice through selective local optimization according to claim 1, characterized in that: Before printing the multi-layer slices layer by layer, the method further includes: Aluminum-magnesium-sc-zirconium metal powder with a powder layer thickness of 30-35 μm is provided at each slice layer. The aluminum-magnesium-sc-zirconium metal powder includes the following elements by weight percentage: Mg is 4-4.2%, Si is 0.6-0.62%, Zr is 0.2-0.22%, Fe is 0-0.02%, and the balance is Al.

7. A storage medium having a computer program stored thereon, characterized in that: When the computer program is run, the method for printing a selectively locally optimized face-centered cubic lattice according to any one of claims 1 to 6 is executed.

8. An electronic device, characterized in that: The method comprises a memory and a processor, wherein the memory is used to store computer instructions; and the processor is used to run the computer instructions to execute the printing method of the selectively locally optimized face-centered cubic lattice according to any one of claims 1 to 6.

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