TC4 / Vitrelloy1 titanium alloy for additive manufacturing, preparation method and additive component

Abstract

The invention discloses a TC4 / Vitreoy1 titanium alloy for additive manufacturing, a preparation method of the TC4 / Vitreoy1 titanium alloy and an additive component, and belongs to the technical field of additive manufacturing, and the TC4 / Vitreoy1 titanium alloy is a mixture of a TC4 titanium alloy and a Vitreoy1 amorphous alloy; wherein the mass percent of the Vitreoy1 amorphous alloy in the mixture is 0.2-5%. The mechanical property of the prepared additive component is greatly improved, the formability and the performance uniformity are excellent, subsequent heat treatment is not needed, and the production process is simplified.

Description

Technical Field

[0001] This invention belongs to the field of additive manufacturing technology, and relates to an additive manufacturing material, particularly to a TC4 / Vitreloy1 titanium alloy for additive manufacturing, its preparation method, and additive components. Background Technology

[0002] Additive manufacturing technology, as a bottom-up part forming technology, relies on the core forming concept of discrete accumulation. Compared with traditional machining methods, it can significantly reduce machining steps, reduce material waste, significantly improve the processing efficiency and forming freedom of complex structural parts, and effectively reduce the investment risk of product research and development and production. It has become a key core technology for manufacturing high-performance structural parts in aerospace, medical, and high-end equipment fields.

[0003] Titanium alloys, with their high specific strength, excellent corrosion resistance, superior biocompatibility, and good high-temperature mechanical properties, are widely used in many fields, including aerospace (such as load-bearing structural components for aircraft and high-temperature engine components), chemical industry (such as corrosion-resistant pipes and high-pressure reaction vessels), medical engineering (such as load-bearing artificial joints and high-precision implantable devices), and sports equipment (such as lightweight high-end sports equipment frames). Among them, α+β type titanium alloys, due to their balanced advantages of high strength and good plasticity, have become the most widely used titanium alloy type in additive manufacturing. TC4 titanium alloy, as a typical representative of α+β type titanium alloys, has long occupied the mainstream application market of additive manufacturing titanium alloys due to its mature manufacturing process and stable basic properties.

[0004] However, with the increasing demands for mechanical properties in aerospace, high-end equipment, and other fields, traditional pure TC4 titanium alloys are gradually exhibiting performance bottlenecks in additive manufacturing applications. On the one hand, after additive manufacturing, the room temperature tensile strength of pure TC4 titanium alloys is typically in the range of 1000-1200 MPa, the room temperature yield strength is approximately 9000-1000 MPa, and the elongation after fracture is about 7-10%, which is insufficient for scenarios requiring higher component strength (such as load-bearing critical components in the aerospace field). On the other hand, during additive manufacturing, the microstructure of TC4 titanium alloys is prone to coarse grains or texture phenomena, leading to insufficient uniformity in the mechanical properties of the components. Especially when subjected to complex loads, this can easily lead to failure risks due to localized weakness. Furthermore, performance improvements of traditional TC4 titanium alloys largely depend on subsequent heat treatment processes, which not only increases production steps and costs but may also affect the dimensional accuracy of components due to heat treatment deformation, limiting its application in high-precision, high-performance integrated components. Summary of the Invention

[0005] To address the limitations of traditional pure TC4 titanium alloys in additive manufacturing applications, such as insufficient room-temperature tensile strength and yield strength, poor performance uniformity due to coarse microstructure, and increased cost and dimensional accuracy risks associated with subsequent heat treatment to improve performance, this invention aims to provide a TC4 / Vitreloy1 titanium alloy for additive manufacturing, its preparation method, and additive components. This titanium alloy, by introducing Vitreloy1 amorphous alloy into a TC4 matrix, achieves a significant improvement in mechanical properties through elemental synergy, while also possessing good additive formability, enabling the stable production of additive components with a balance between high strength and a certain degree of plasticity.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing: the TC4 / Vitreloy1 titanium alloy is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy; wherein, the TC4 titanium alloy is Ti-6Al-4V, with the following mass fractions of each element: Al, 5.5~6.75%, V, 3.5~4.5%, Fe, ≤0.3%, and the balance being Ti; the Vitreloy1 amorphous alloy is 41.2Zr-13.8Ti-12.5Cu-10Ni-22.5Be (atomic ratio), with the following mass fractions of each element: Ti, 9.8~13.1%, Cu, 12.3~18.5%, Ni, 2.1%~12.8%, Be, 0.8%~3.2%, and the balance being Zr; the Vitreloy1 amorphous alloy accounts for 0.2~5% of the mixture by mass, preferably 3%.

[0007] To optimize the above technical solution, the specific measures also include: Furthermore, the elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are as follows: Al, 5.5~6%, Zr, 0.05~2.5%, Cu, 0.02~0.4%, V, 3.5~4.0%, Be, 0.02~1.25%, Ni, 0.02~0.5%, Fe, 0.2~0.3%, with the balance being Ti.

[0008] In a second aspect, the present invention also provides a method for preparing the above-mentioned TC4 / Vitreloy1 titanium alloy for additive manufacturing, comprising the following steps: S1, preparing TC4 titanium alloy and Vitreloy1 amorphous alloy into powders respectively; S2, mixing TC4 titanium alloy powder and Vitreloy1 amorphous alloy powder to obtain the TC4 / Vitreloy1 titanium alloy.

[0009] To optimize the above technical solution, the specific measures also include: Furthermore, in S1, the TC4 titanium alloy and the Vitreloy1 amorphous alloy are atomized into powder using a gas atomization furnace.

[0010] Furthermore, in S1, the particle size of the TC4 titanium alloy powder obtained is 15~53 μm; Furthermore, in S1, the particle size of the Vitreloy1 amorphous alloy powder obtained is 15~25 μm, preferably 20 μm.

[0011] Furthermore, in S2, TC4 titanium alloy powder and Vitreloy1 amorphous alloy powder are mixed by ball milling.

[0012] Thirdly, the present invention also provides an additive component: prepared by additive manufacturing using the above-mentioned TC4 / Vitreloy1 titanium alloy.

[0013] Fourthly, the present invention also provides a method for preparing the above-mentioned additive components: the TC4 / Vitreloy1 titanium alloy is used to prepare a titanium alloy bulk material by means of LPBF (laser powder bed melting) additive manufacturing method under a flowing argon atmosphere, wherein each layer of molten pool is inclined at 60~70° to the next layer of molten pool, preferably 66.7°.

[0014] To optimize the above technical solution, the specific measures also include: Furthermore, in the LPBF additive manufacturing method, the laser scanning speed is 800~1200 mm / s, the laser power is 180~240 W, the hatch spacing is 60~80 μm, preferably 70 μm, and the layer thickness is 20~40 μm, preferably 30 μm.

[0015] This invention modifies the base titanium alloy by introducing an amorphous alloy. The amorphous alloy has the characteristics of stable composition and narrow solidification range. In the additive manufacturing process, it has a synergistic effect with the base alloy, thereby improving the mechanical properties.

[0016] Vitreloy 1 amorphous alloy has excellent amorphous properties and strengthening potential. Its Zr, Cu, Ni and Be can not only form stable solid solutions or dispersed second phases with titanium, but also refine the alloy microstructure through amorphous reactions. At the same time, the synergistic effect between the elements can further optimize the strength and plasticity matching of the alloy.

[0017] Specifically, the introduction of Vitreloy1 amorphous alloy not only did not disrupt the original α+β two-phase equilibrium structure of TC4 titanium alloy, but also achieved a significant improvement in mechanical properties through the following effects: On the one hand, elements such as Zr, Cu, and Ni in Vitreloy1 amorphous alloy dissolved into the TC4 matrix to form a multi-component solid solution, greatly enhancing the solid solution strengthening effect; on the other hand, Be elements formed dispersed amorphous phases (such as Ti-Be and Zr-Be compounds) with Ti, Zr, etc. These dispersed phases can effectively hinder dislocation movement and refine the grain structure formed during additive manufacturing, avoiding performance degradation caused by coarse grains; in addition, the low solidification range characteristics of Vitreloy1 amorphous alloy can also improve the melting fluidity and solidification formability of TC4 powder during additive manufacturing, further improving the uniformity of the microstructure of the component.

[0018] Aluminum is the core α-phase stabilizing element and solid solution strengthening element in the TC4 matrix. Each 1% increase in Al can raise the room temperature tensile strength of the titanium alloy by approximately 50 MPa. Simultaneously, aluminum improves the alloy's oxidation resistance, reduces overall density, increases recrystallization temperature, and enhances hot strength. In this invention, the aluminum content is controlled within the range of 5.5% to 6%. This range ensures both basic strengthening of the matrix and allows for synergistic effects with other strengthening elements introduced into the Vitreloy1 amorphous alloy, avoiding excessive reduction in plasticity due to excessive Al content.

[0019] Vanadium is a core β-phase stabilizing element in the TC4 matrix, capable of solid solution strengthening of the β-phase structure, lowering the phase transformation point, improving hardenability, and ensuring the formation of a uniform α+β two-phase structure in the alloy. In this invention, the vanadium content is controlled within the range of 3.5~4.0%, which maintains the stability of the β-phase in the matrix. Simultaneously, it synergizes with β-phase elements such as Zr and Ni in the Vitreloy1 amorphous alloy to further optimize the two-phase ratio and enhance the alloy strength.

[0020] Zirconium is derived entirely from Vitreloy 1 amorphous alloys. As an element in the same group as Ti, it exhibits excellent solid solution compatibility in the TC4 matrix, significantly improving both room temperature and high temperature strength, as well as corrosion resistance. More importantly, Zr can synergistically refine grains with other elements in the Vitreloy 1 amorphous alloy, alleviating the grain coarsening problem that easily occurs in TC4 during additive manufacturing, making it one of the key elements for improving mechanical properties. In this invention, the zirconium content is controlled within the range of 1.0~1.5%. This content maximizes its solid solution strengthening and grain refinement effects while avoiding excessive reduction in the alloy's melting point due to excessive Zr content.

[0021] Copper, derived from Vitreloy 1 amorphous alloy, is an important strengthening element. On one hand, Cu, after being dissolved into the matrix, enhances the solid solution strengthening effect; on the other hand, Cu readily forms dispersed intermetallic compounds with Ti (such as Ti₂Cu), and these dispersed phases effectively hinder dislocation movement, significantly improving the alloy's strength. In this invention, the copper content is controlled within the range of 0.3~0.4%, which allows for the formation of an appropriate amount of dispersed strengthening phases while avoiding excessive phase precipitation and decreased plasticity caused by excessive Cu content.

[0022] Beryllium, derived from Vitreloy 1 amorphous alloys, is a core element for achieving amorphous strengthening. Be can form low-melting-point amorphous phases with Ti and Zr. During additive manufacturing solidification, these amorphous phases can act as heterogeneous nucleation sites, refining the grain structure. Simultaneously, the addition of Be improves the alloy's melting fluidity, enhances forming quality, and indirectly ensures uniformity of mechanical properties. In this invention, the beryllium content is controlled within the range of 0.5% to 1%. This range effectively refines the amorphous structure and improves fluidity while avoiding increased alloy brittleness due to excessive Be content.

[0023] Nickel, derived from the Vitreloy 1 amorphous alloy, is a β-phase stabilizing element that enhances the stability of the matrix β-phase and improves hardenability. Simultaneously, Ni can synergistically form a multi-component strengthening phase with Cu and Ti, further enhancing the alloy's strength and hardness while having minimal impact on its plasticity. In this invention, the nickel content is controlled within the range of 0.25~0.35%, a content that allows for synergistic strengthening effects with other elements while simultaneously controlling alloy costs.

[0024] Iron is a common impurity element in titanium alloys. A small amount of Fe can enhance the alloy's strength through solid solution strengthening. In this invention, the iron content is controlled within the range of 0.2% to 0.3%. This range allows for the utilization of its small amount of strengthening effect while avoiding the decrease in alloy thermal stability and compositional segregation caused by excessive Fe content, thus ensuring the uniformity of component performance.

[0025] This invention introduces Vitreloy1 amorphous alloy, enabling the TC4 matrix and the multi-element components in the Vitreloy1 amorphous alloy to form a synergistic mechanism of solid solution strengthening, dispersion strengthening, and grain refinement. This synergistic effect is achieved by precisely controlling the amount of Vitreloy1 amorphous alloy added and the final composition ratio, so that elements such as Zr, Cu, Ni, and Be are deeply coupled with Al and V elements in the TC4 matrix. While ensuring that the alloy is compatible with additive manufacturing processes, a breakthrough improvement in mechanical properties is achieved.

[0026] The beneficial effects of this invention are as follows: I. Significantly Improved Mechanical Properties. The additive components obtained by LPBF additive manufacturing of the alloy of this invention have a room temperature tensile strength of 1397~1481 MPa, which is about 30~45% higher than that of traditional pure TC4 additives (typically 1100~1300 MPa); the room temperature yield strength can reach 1301~1398 MPa, which is about 30~45% higher than that of traditional pure TC4 additives (typically 1000~1200 MPa); while maintaining an elongation after fracture of 5~9%, a good balance between high strength and certain plasticity is achieved, completely breaking through the performance bottleneck of traditional TC4 titanium alloys, and meeting the high strength requirements of key load-bearing components in aerospace and other fields; II. Excellent formability and performance uniformity. On the one hand, the low solidification range of Vitreloy1 amorphous alloy improves the melting fluidity and solidification formability of TC4 titanium alloy powder. Combined with the inclined design of each molten pool and the next molten pool in the LPBF process, it effectively reduces defects such as porosity and cracks in the additive manufacturing process, resulting in high forming quality. On the other hand, elements such as Zr and Be refine the grains through amorphous reactions, avoiding the coarse grains or texture phenomena that are prone to occur in traditional TC4 additives, improving the uniformity of mechanical properties of components, and reducing the risk of local failure under complex loads. Third, no subsequent heat treatment is required, simplifying the production process. This invention directly improves mechanical properties through component design, without relying on subsequent heat treatment processes. This avoids the component dimensional deformation problems caused by heat treatment, ensuring dimensional accuracy, while reducing production steps, shortening the production cycle, and further reducing production costs and process complexity. Attached Figure Description

[0027] Figure 1 This is the tensile curve of the additive component obtained in Example 15; Figure 2 This is the fracture morphology of the additive component obtained in Example 15. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments.

[0029] Example 1 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy contains the following elements by mass percentage: Al, 6.000%, V, 4.000%, Fe, 0.3%, with the balance being Ti; the Vitreloy1 amorphous alloy contains the following elements by mass percentage: Ti, 11.8%, Cu, 14.0%, Ni, 11.2%, Be, 1.2%, with the balance being Zr; the Vitreloy1 amorphous alloy accounts for 0.2% of the mixture by mass percentage. The TC4 / Vitreloy1 titanium alloy contains the following elements by mass percentage: Al, 5.988%, Zr, 0.082%, Cu, 0.025%, V, 3.992%, Be, 0.045%, Ni, 0.02%, Fe, 0.299%, with the balance being Ti.

[0030] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0031] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0032] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0033] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1145 MPa, the yield strength was 1051 MPa, and the elongation after fracture was 9.4%; the tensile strength perpendicular to the substrate direction was 1139 MPa, the yield strength was 1049 MPa, and the elongation after fracture was 9.8%.

[0034] Example 2 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 0.5% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.970%, Zr, 0.206%, Cu, 0.063%, V, 3.980%, Be, 0.113%, Ni, 0.050%, Fe, 0.299%, with the balance being Ti.

[0035] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0036] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0037] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0038] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1224 MPa, the yield strength was 1131 MPa, and the elongation after fracture was 8.9%; the tensile strength perpendicular to the substrate direction was 1195 MPa, the yield strength was 1101 MPa, and the elongation after fracture was 9.1%.

[0039] Example 3 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 1% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.940%, Zr, 0.412%, Cu, 0.125%, V, 3.960%, Be, 0.225%, Ni, 0.100%, Fe, 0.297%, with the balance being Ti.

[0040] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0041] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0042] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0043] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1256 MPa, the yield strength was 1169 MPa, and the elongation after fracture was 8.5%; the tensile strength perpendicular to the substrate direction was 1199 MPa, the yield strength was 1115 MPa, and the elongation after fracture was 9.1%.

[0044] Example 4 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 2% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.880%, Zr, 0.824%, Cu, 0.250%, V, 3.920%, Be, 0.450%, Ni, 0.200%, Fe, 0.294%, with the balance being Ti.

[0045] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0046] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0047] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0048] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1308 MPa, the yield strength was 1237 MPa, and the elongation after fracture was 8%. The tensile strength perpendicular to the substrate direction was 1247 MPa, the yield strength was 1181 MPa, and the elongation after fracture was 8.2%.

[0049] Example 5 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 3% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.820%, Zr, 1.236%, Cu, 0.375%, V, 3.880%, Be, 0.675%, Ni, 0.300%, Fe, 0.291%, with the balance being Ti.

[0050] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0051] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0052] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0053] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1451 MPa, the yield strength was 1382 MPa, and the elongation after fracture was 7%. The tensile strength perpendicular to the substrate direction was 1422 MPa, the yield strength was 1341 MPa, and the elongation after fracture was 7.6%.

[0054] Example 6 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 4% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.760%, Zr, 1.648%, Cu, 0.500%, V, 3.840%, Be, 0.900%, Ni, 0.400%, Fe, 0.288%, with the balance being Ti.

[0055] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0056] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0057] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0058] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1329 MPa, the yield strength was 1268 MPa, and the elongation after fracture was 2.9%; the tensile strength perpendicular to the substrate direction was 1358 MPa, the yield strength was 1264 MPa, and the elongation after fracture was 3.4%.

[0059] Example 7 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 5% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.700%, Zr, 2.06%, Cu, 0.625%, V, 3.800%, Be, 1.125%, Ni, 0.500%, Fe, 0.285%, with the balance being Ti.

[0060] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0061] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0062] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0063] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 784 MPa, at which point the material broke directly without yielding; the tensile strength perpendicular to the substrate direction was 912 MPa, at which point the material broke directly without yielding.

[0064] Example 8 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 3% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.820%, Zr, 1.236%, Cu, 0.375%, V, 3.880%, Be, 0.675%, Ni, 0.300%, Fe, 0.291%, with the balance being Ti.

[0065] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0066] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 200 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0067] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0068] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1415 MPa, the yield strength was 1355 MPa, and the elongation after fracture was 6.9%; the tensile strength perpendicular to the substrate direction was 1401 MPa, the yield strength was 1329 MPa, and the elongation after fracture was 7.7%.

[0069] Example 9 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 3% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.700%, Zr, 2.06%, Cu, 0.625%, V, 3.800%, Be, 1.125%, Ni, 0.500%, Fe, 0.285%, with the balance being Ti.

[0070] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0071] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 210 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0072] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0073] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1447 MPa, the yield strength was 1381 MPa, and the elongation after fracture was 6.2%. The tensile strength perpendicular to the substrate direction was 1419 MPa, the yield strength was 1354 MPa, and the elongation after fracture was 6.7%.

[0074] Example 10 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 3% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.700%, Zr, 2.06%, Cu, 0.625%, V, 3.800%, Be, 1.125%, Ni, 0.500%, Fe, 0.285%, with the balance being Ti.

[0075] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0076] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 220 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0077] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0078] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1397 MPa, the yield strength was 1341 MPa, and the elongation after fracture was 6.9%. The tensile strength perpendicular to the substrate direction was 1403 MPa, the yield strength was 1351 MPa, and the elongation after fracture was 6.5%.

[0079] Example 11 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 3% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.700%, Zr, 2.06%, Cu, 0.625%, V, 3.800%, Be, 1.125%, Ni, 0.500%, Fe, 0.285%, with the balance being Ti.

[0080] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0081] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 800 mm / s, the laser power to 240 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0082] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0083] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1481 MPa, the yield strength was 1429 MPa, and the elongation after fracture was 5%. The tensile strength perpendicular to the substrate direction was 1398 MPa, the yield strength was 1324 MPa, and the elongation after fracture was 6.1%.

[0084] Example 12 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 3% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.700%, Zr, 2.06%, Cu, 0.625%, V, 3.800%, Be, 1.125%, Ni, 0.500%, Fe, 0.285%, with the balance being Ti.

[0085] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0086] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 900 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0087] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0088] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1418 MPa, the yield strength was 1361 MPa, and the elongation after fracture was 8.1%; the tensile strength perpendicular to the substrate direction was 1358 MPa, the yield strength was 1294 MPa, and the elongation after fracture was 7.8%.

[0089] Example 13 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 3% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.700%, Zr, 2.06%, Cu, 0.625%, V, 3.800%, Be, 1.125%, Ni, 0.500%, Fe, 0.285%, with the balance being Ti.

[0090] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0091] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 1000 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0092] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0093] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1449 MPa, the yield strength was 1391 MPa, and the elongation after fracture was 7.7%. The tensile strength perpendicular to the substrate direction was 1388 MPa, the yield strength was 1291 MPa, and the elongation after fracture was 7.9%.

[0094] Example 14 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 3% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.700%, Zr, 2.06%, Cu, 0.625%, V, 3.800%, Be, 1.125%, Ni, 0.500%, Fe, 0.285%, with the balance being Ti.

[0095] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0096] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 1100 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0097] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0098] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1401 MPa, the yield strength was 1349 MPa, and the elongation after fracture was 8.1%; the tensile strength perpendicular to the substrate direction was 1412 MPa, the yield strength was 1347 MPa, and the elongation after fracture was 8.8%.

[0099] Example 15 This embodiment provides a TC4 / Vitreloy1 titanium alloy for additive manufacturing, which is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy. The TC4 titanium alloy and Vitreloy1 amorphous alloy are the same as in Example 1, with the Vitreloy1 amorphous alloy accounting for 3% of the mixture by mass. The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are: Al, 5.700%, Zr, 2.06%, Cu, 0.625%, V, 3.800%, Be, 1.125%, Ni, 0.500%, Fe, 0.285%, with the balance being Ti.

[0100] The preparation method of TC4 / Vitreloy1 titanium alloy is as follows: TC4 titanium alloy and Vitreloy1 amorphous alloy are prepared into spherical powders with particle sizes of 15~53 μm and 20 μm respectively by gas atomization powder preparation method, and then thoroughly mixed by ball mill.

[0101] This embodiment also provides an additive component, the preparation method of which is as follows: TC4 / Vitreloy1 titanium alloy powder is additively manufactured using LPBF additive manufacturing technology. The laser scanning speed is set to 1200 mm / s, the laser power to 190 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The additive manufacturing yields a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0102] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0103] According to the national standard for tensile testing, the additive material was fabricated into tensile specimens conforming to the national standard and subjected to tensile tests. The tensile strength parallel to the substrate direction was 1397 MPa, the yield strength was 1338 MPa, and the elongation after fracture was 9%. The tensile strength perpendicular to the substrate direction was 1415 MPa, the yield strength was 1367 MPa, and the elongation after fracture was 7.9%. The tensile curves of the additive component are shown below. Figure 1 As shown, the fracture morphology is as follows Figure 2 As shown.

[0104] Comparative Example 1 This comparative example provides an additive component, the preparation method of which is as follows: LPBF additive manufacturing technology is used to additively manufacture conventional TC4 titanium alloy powder (same as in Example 1). The laser scanning speed is set to 900 mm / s, the laser power to 180 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The resulting block sample has dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0105] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0106] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1109 MPa, the yield strength was 1012 MPa, and the elongation after fracture was 7%. The tensile strength perpendicular to the substrate direction was 1146 MPa, the yield strength was 1051 MPa, and the elongation after fracture was 6.9%.

[0107] Comparative Example 2 This comparative example provides an additive component, the preparation method of which is as follows: LPBF additive manufacturing technology is used to additively manufacture conventional TC4 titanium alloy powder (same as in Example 1). The laser scanning speed is set to 900 mm / s, the laser power to 200 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The resulting additive component is a block sample with dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: one parallel to the substrate and the other perpendicular to the substrate.

[0108] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0109] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1147 MPa, the yield strength was 1069 MPa, and the elongation after fracture was 7.2%. The tensile strength perpendicular to the substrate direction was 1121 MPa, the yield strength was 1049 MPa, and the elongation after fracture was 7.4%.

[0110] Comparative Example 3 This comparative example provides an additive component, the preparation method of which is as follows: LPBF additive manufacturing technology is used to additively manufacture conventional TC4 titanium alloy powder (same as in Example 1). The laser scanning speed is set to 900 mm / s, the laser power to 220 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The resulting block sample has dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: those parallel to the substrate and those perpendicular to the substrate.

[0111] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0112] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1091 MPa, the yield strength was 1022 MPa, and the elongation after fracture was 5.9%; the tensile strength perpendicular to the substrate direction was 1044 MPa, the yield strength was 992 MPa, and the elongation after fracture was 6.1%.

[0113] Comparative Example 4 This comparative example provides an additive component, the preparation method of which is as follows: LPBF additive manufacturing technology is used to additively manufacture conventional TC4 titanium alloy powder (same as in Example 1). The laser scanning speed is set to 1000 mm / s, the laser power to 180 W, the hatch spacing to 70 μm, and the powder layer thickness to 30 μm. Before additive manufacturing, a vacuum is pre-evacuated and then argon gas is introduced. The angle between each molten pool and the next molten pool is 66.7°. The resulting block sample has dimensions of 10 × 10 × 10 cm. The prepared sample is cut into two types of samples: one parallel to the substrate and the other perpendicular to the substrate.

[0114] Metallographic specimens were prepared and their microstructure was observed. It was found that the additive structure was basket-like, with columnar crystals perpendicular to the substrate and equiaxed crystals parallel to the substrate.

[0115] According to the national standard for tensile testing, the additive material was made into tensile specimens that meet the national standard and tensile tests were conducted. The tensile strength parallel to the substrate direction was 1187 MPa, the yield strength was 1120 MPa, and the elongation after fracture was 6.6%; the tensile strength perpendicular to the substrate direction was 1099 MPa, the yield strength was 1023 MPa, and the elongation after fracture was 7.4%.

[0116] In this invention, unless otherwise stated, scientific and technical terms used herein have the meanings commonly understood by those skilled in the art. Furthermore, the reagents, materials, and procedures used herein are all widely used in the relevant fields.

[0117] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A TC4 / Vitreloy 1 titanium alloy for additive manufacturing, characterized in that: The TC4 / Vitreloy1 titanium alloy is a mixture of TC4 titanium alloy and Vitreloy1 amorphous alloy; wherein the Vitreloy1 amorphous alloy accounts for 0.2~5% of the mass percentage of the mixture.

2. The TC4 / Vitreloy 1 titanium alloy for additive manufacturing according to claim 1, characterized in that: The elements in the TC4 / Vitreloy1 titanium alloy, by mass percentage, are as follows: Al, 5.5~6%, Zr, 0.05~2.5%, Cu, 0.02~0.4%, V, 3.5~4.0%, Be, 0.02~1.25%, Ni, 0.02~0.5%, Fe, 0.2~0.3%, with the balance being Ti.

3. The method for preparing TC4 / Vitreloy1 titanium alloy for additive manufacturing as described in claim 1 or 2, characterized in that: Includes the following steps: S1. Prepare TC4 titanium alloy and Vitreloy1 amorphous alloy into powders respectively; S2. Mix TC4 titanium alloy powder and Vitreloy1 amorphous alloy powder to obtain the TC4 / Vitreloy1 titanium alloy.

4. The method for preparing TC4 / Vitreloy1 titanium alloy for additive manufacturing according to claim 3, characterized in that: In S1, TC4 titanium alloy and Vitreloy1 amorphous alloy are atomized into powder using a gas atomization furnace.

5. The method for preparing TC4 / Vitreloy1 titanium alloy for additive manufacturing according to claim 3, characterized in that: In step S1, the particle size of the TC4 titanium alloy powder obtained is 15~53 μm.

6. The method for preparing TC4 / Vitreloy1 titanium alloy for additive manufacturing according to claim 3, characterized in that: In S1, the particle size of the Vitreloy1 amorphous alloy powder obtained is 15~25 μm.

7. The method for preparing TC4 / Vitreloy1 titanium alloy for additive manufacturing according to claim 3, characterized in that: In step S2, TC4 titanium alloy powder and Vitreloy1 amorphous alloy powder are mixed by ball milling.

8. An additive manufacturing component, characterized in that: It is prepared by additive manufacturing using the TC4 / Vitreloy1 titanium alloy as described in claim 1 or 2.

9. The method for preparing the additive component as described in claim 8, characterized in that: The TC4 / Vitreloy1 titanium alloy was used to prepare titanium alloy bulk materials by LPBF additive manufacturing in a flowing argon atmosphere, with each molten pool inclined at 60-70° to the next molten pool.

10. The method for preparing the additive component according to claim 9, characterized in that: In the LPBF additive manufacturing method, the laser scanning speed is 800~1200 mm / s, the laser power is 180~240 W, the hatch spacing is 60~80 μm, and the layer thickness is 20~40 μm.

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