CN112176221A - Novel Ti-Zr-V-Nb alloy for laser additive manufacturing - Google Patents
Novel Ti-Zr-V-Nb alloy for laser additive manufacturing Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 239000000654 additive Substances 0.000 title claims abstract description 37
- 230000000996 additive effect Effects 0.000 title claims abstract description 37
- 229910001257 Nb alloy Inorganic materials 0.000 title claims abstract description 22
- 239000000956 alloy Substances 0.000 claims abstract description 85
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 84
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 13
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 13
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 12
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 abstract description 24
- 230000008018 melting Effects 0.000 abstract description 21
- 239000006104 solid solution Substances 0.000 abstract description 17
- PMTRSEDNJGMXLN-UHFFFAOYSA-N titanium zirconium Chemical compound [Ti].[Zr] PMTRSEDNJGMXLN-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 6
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- 238000012545 processing Methods 0.000 abstract description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 32
- 229910052786 argon Inorganic materials 0.000 description 16
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- 238000005260 corrosion Methods 0.000 description 16
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
- C22C1/0458—Alloys based on titanium, zirconium or hafnium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention belongs to the technical field of new materials, and provides a novel Ti-Zr-V-Nb alloy for laser additive manufacturing, which comprises Ti, Zr, V and Nb elements, wherein the atomic percent of the alloy is (57.03-60.16%) Ti- (35.16-38.67%) Zr- (0.39-3.91%) V- (0.78-3.91%) Nb. The invention has the advantages that the Ti-Zr-V-Nb alloy has a simple body-centered cubic solid solution structure, V and Nb are dissolved in the alloy matrix in a solid solution manner, the inherent performance advantages of the Ti-Zr direct melting point alloy are ensured, and the strength and hardness of the alloy are effectively enhanced through solid solution strengthening; the novel Ti-Zr-V-Nb alloy has excellent formability and mechanical property, and has wider processing window and component range, thereby being very suitable to be used as a special material for laser additive manufacturing.
Description
Technical Field
The invention provides a Ti-Zr-V-Nb novel alloy for laser additive manufacturing, which has excellent comprehensive performance and good weldability and belongs to the technical field of new materials.
Background
The laser additive manufacturing technology is an integrated manufacturing technology which meets the requirements of accurate forming and high performance, has the advantages of high flexibility, short period, low cost, integration of forming and structural performance control and the like, and provides a new way for preparing titanium alloy complex structure parts which are usually difficult to process. Therefore, in recent years, laser additive manufacturing of titanium alloys has received much attention and interest worldwide. However, the titanium alloys used in laser additive manufacturing currently mainly use traditional alloy material systems (such as TC4, TC11 and TA 15), and the design of these alloys does not consider the specificity of laser additive manufacturing, so that some performance indexes cannot meet the requirements of industrial application and laser additive manufacturing process. Therefore, the research and development of a new titanium alloy system suitable for metal laser additive manufacturing has important practical significance.
The main feature of laser additive manufacturing is that the alloy undergoes a process from melting to solidification in a short time. In order to achieve effective control from the molten state to the solidification full state, the alloy is required to have properties such as good liquid fluidity, low crack sensitivity, low composition segregation, and a wide processing window. Thus, the core material is selected based on the alloy having high melt and solid state structural compatibility. From a structural root perspective, this compatibility is manifested in a highly stable chemically near-programmed structure across the melt to solid, which will dominate the formation of the texture and control of properties throughout the forming process. This makes the choice of the alloy system crucial, one of the preferred principles being the approach to the direct melting (alloying) composition point. Because the direct melting point alloy is solidified at a constant temperature like pure metal, the direct melting point alloy has excellent liquid fluidity and high structure stability, and in addition, the solid phase component is always the same as the liquid phase component in the solidification process, and micro segregation cannot be generated. The Ti-Zr direct-melting alloy is well verified in the experiment of laser additive manufacturing of Ti-Zr direct-melting alloy, has high structural stability and uniformity, good forming performance and excellent corrosion resistance in the process of laser additive manufacturing alternating-heating thermal cycle, has the plastic strain amount of more 56 percent and is far higher than that of the traditional TC4 alloy, and thus has the potential of becoming a laser additive manufacturing material. But also reveals some defects in mechanical property, such as lower strength and hardness. Therefore, how to effectively improve the mechanical properties of the directly-fused gold while maintaining the inherent performance advantages of the directly-fused gold is the key point for determining whether the alloy system can be used as a laser additive manufacturing material.
Solid solution strengthening is one of the effective methods to increase the hardness and strength of titanium alloys, and is essentially the result of the interaction of dislocations and solutes. The purpose of improving the hardness and strength of the alloy is achieved by taking the elements strongly interacting with dislocation as one of the preferential selection principles and optimizing the design of the alloy components in consideration of the atomic characteristics of the alloy; meanwhile, in order to improve and enhance the stability of the alloy structure, effectively inhibit precipitated phases and simultaneously solve the problem of the expansion of the solidification interval while stabilizing the structure, the alloy elements still need to have good beta-Ti stabilizing effect and be not suitable for expanding a liquid-solid two-phase region within a certain adding range. In view of the above, V and Nb are two desirable alloying elements because they have the above characteristics.
But the key of the problem is how to realize the optimal design of alloy elements so as to realize the optimal matching relationship between the alloy structure and the mechanical and technological properties. Different from single-element alloying, due to the existence of strong coupling effect among multiple alloying components, the alloy structure and performance evolution has a plurality of uncertainties, the topological change characteristics are presented, the effect of the single components and the structure performance in the multiple alloy is difficult to be estimated by the mapping relation between the single components and the structure performance, and the traditional component design method is difficult to effectively design the multiple alloy. Based on the method, the alloy is optimally designed by adopting an advanced cluster model. The model organically unifies the composition and structure information of the alloy into a cluster type, and fuses the influence of coupling factors on the alloy structure. On the basis, the strengthening rule and the internal mechanism of the multi-component alloying are revealed through systematic experimental research, and the model is corrected, so that the optimization design of the alloy components is realized.
Disclosure of Invention
The invention aims to research and develop a Ti-Zr-V-Nb novel alloy with excellent comprehensive performance and good weldability for laser additive manufacturing aiming at the current situation that the existing titanium alloy is difficult to meet the manufacturing manufacturability and usability of laser additive manufacturing.
The technical scheme adopted by the invention is as follows:
a novel Ti-Zr-V-Nb alloy for laser additive manufacturing with excellent comprehensive performance and good weldability is characterized in that: it comprises Ti, Zr, V and Nb elements, and the atomic percentage of the components is (57.03-60.16%) Ti- (35.16-38.67%) Zr- (0.39-3.91%) V- (0.78-3.91%) Nb.
The preferred composition of the alloy is (57.03-60.16%) Ti-36.72% Zr-2.34% V- (0.78-3.91%) Nb in atomic percent.
The concept of realizing the technical scheme is that the Ti-Zr-V-Nb alloy is designed by taking a binary Ti-Zr direct melting point alloy as an element, taking V and Nb as alloying elements and utilizing a cluster + connecting atom model. The good liquid flow and low micro segregation of Ti-Zr direct melting point alloy are utilized to improve the formability of the alloy, and the structural stability and the mechanical property of the alloy are improved by utilizing the stability of V and Nb to beta-Ti and the large atomic radius difference with Ti.
"Cluster + connecting atom"The model divides the alloy structure into two parts: a cluster portion and a connecting atom portion, wherein the cluster is a close-neighbor coordination polyhedron with a plurality of atoms as shells centered on a certain atom, generally a close-packed structure with a high coordination number, and the connecting atom occupies a gap position between the cluster and the cluster. There is a strong interaction between the constituent elements that make up the cluster, while the connection between clusters is a relatively weak interaction. The cluster model is based on the correlation effect among atoms, and can uniformly describe the composition and the structure of the alloy as follows: [ Cluster ]][ connecting atom ]]XWherein x is the number of linking atoms. Solid solutions retain the crystal topology over the long range, with the near-sequence being primarily a chemical near-sequence that depends on the solute-solvent interaction mode. The superior alloy composition results from ideal chemical near-order structural units. Based on the structural analysis of the binary Ti-Zr direct-melting alloy, the phase diagram can be regarded as an independent component to divide the phase diagram into two independent parts which respectively correspond to two stable chemical near-program structural units. One is a beta-Ti chemical near-programming structural unit, the cluster part of which is CN14[ Zr-Ti ] with Zr as the core14]Clusters, the connecting atoms of which are Ti atoms occupying interstitial positions of the super-cellular octahedron of the cluster, the corresponding cluster formula being [ Zr-Ti ]14]Ti1(ii) a The other is a beta-Zr chemical near-program structural unit, and the cluster part is CN14[ Ti-Zr ] taking Ti as the core14]Clustering, while Zr acts as a connecting atom, which also occupies the octahedral interstitial sites of the super-protocell, thereby giving a chemical structural unit the cluster composition formula [ Ti-Zr ]14]Zr1. According to the cluster close packing principle, when the number of chemical structural units in the super cluster formula is 16, the super cluster close packing rate is the largest, and the structure is the most stable. The direct-fused gold cluster derived therefrom has a compositional formula of 10[ Zr-Ti ]14]Ti1+6[Ti-Zr14]Zr1. When alloying straight melting point alloys with V and Nb for effective solid solution strengthening will involve the problem of alloyed cluster type build up. The close neighbor distribution structure among atoms in the solid solution alloy mainly depends on the interaction among elements, and the enthalpy of mixing among the elements directly reflects the strength of the interaction among the atoms and the tendency degree of alloying among the elements. This is based on the alloying elementsThe enthalpy of mixing with the matrix titanium is large, and the occupation of the alloying elements in a cluster structure model is determined by combining the action of the alloying elements, so that the component design of the multi-element solid solution alloy is realized. Based on the principle and combining the properties of alloying elements, the new alloying cluster formula can be expressed as follows: 10[ (Zr)1-yVy)-Ti14](Ti1-xNbx)1+6[Ti-Zr14]Zr1. On the basis, the change rule of alloy microstructure and performance along with alloying elements is analyzed through systematic experimental study, and the model is corrected, so that the optimization design of alloy components is realized.
According to the invention, pure metals of Ti, Zr, V and Nb with the mass purity higher than 99.90 percent are weighed according to the designed components; then, a non-consumable arc melting method is adopted to carry out multiple times of melting on the mixture ratio under the protection of argon gas so as to ensure the uniformity of alloy components, and the specific melting parameters are as follows: argon pressure of 0.04 +/-0.01 MPa and smelting current density of 200 +/-5A/cm2(ii) a Putting the master alloy into a vacuum ball mill, ball-milling for 60 hours at the rotating speed of 200r/min, and screening Ti-Zr-V-Nb alloy powder with the granularity of 48-80 mu m by using a 300-mesh sieve; and placing the alloy powder in an automatic powder feeder, and performing laser additive manufacturing of the alloy on a pure titanium or titanium alloy substrate by taking argon as protective gas. The optimized process parameters are as follows: laser power is 2.0-3.0KW, scanning speed of 4mm spot diameter is 5-10mm/s, powder feeding rate is 3.5-6.5g/min, overlapping rate is 50%, and argon flow is 9.0 lites/min.
X-ray diffraction and scanning electron microscope analysis show that the Ti-Zr-V-Nb alloy manufactured by the laser additive manufacturing method is composed of equiaxial beta solid solution with the grain size of 100-150 mu m.
Microhardness tests and compression tests show that the hardness of the Ti-Zr-V-Nb alloy manufactured by the laser additive manufacturing method is HV 400-450, the yield strength is 940-1215 MPa, the compressive strength is 1180-1350 MPa, and the compressive strain is 46-55%.
Electrochemical corrosion tests show that the corrosion potential of the Ti-Zr-V-Nb alloy manufactured by laser additive manufacturing in 1mol/l HCl corrosion medium is-0.32455 to-0.17204V, and the corrosion current is 6.6601 multiplied by 10-8～3.2266×10-7Amps/cm2。
A roughness profile instrument is adopted to test the surface of the formed body, and the roughness of the surface of the Ti-Zr-V-Nb alloy manufactured by the laser additive manufacturing is 0.8-2.5 mu m.
Based on the comprehensive comparison of the alloy properties, the alloy is optimized to have the composition range of (57.03-60.16%) Ti-36.72% Zr-2.34% V- (0.78-3.91%) Nb (atomic percentage).
The invention has the advantages that:
1. the Ti-Zr-V-Nb alloy has a simple body-centered cubic solid solution structure, V and Nb are dissolved in the alloy matrix in a solid solution manner, and the strength and hardness of the alloy are effectively enhanced through solid solution strengthening while the inherent performance advantages of the Ti-Zr direct melting point alloy are ensured;
2. the novel Ti-Zr-V-Nb alloy not only has excellent formability, but also has excellent mechanical and chemical properties, and has wider processing window and component range, so the novel Ti-Zr-V-Nb alloy is very suitable to be used as a special material for laser additive manufacturing.
Drawings
FIG. 1 shows laser additive manufacturing of Ti60.16Zr36.72V2.34Nb0.78、Ti58.59Zr36.72V2.34Nb2.35And Ti57.03Zr36.72V2.34Nb3.91X-ray diffraction patterns of the three optimized alloys. As can be seen, the as-deposited alloys are composed of beta single phase solid solution solids in a body centered cubic structure. The least square calculation shows that the lattice constant of the beta solid solution is gradually increased along with the increase of the Nb content.
FIG. 2 shows typical SEM morphologies of three optimized alloys for laser additive manufacturing, wherein (a) is Ti60.16Zr36.72V2.34Nb0.78And (b) is Ti58.59Zr36.72V2.34Nb2.35And (c) is Ti57.03Zr36.72V2.34Nb3.91. As can be seen, the alloy structure in the deposition state shows the morphological characteristics of equiaxed crystal, and the grain size of the alloy structure is gradually thinned along with the increase of the Nb content.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
Example 1
The alloy component is Ti60.16Zr36.72V2.34Nb0.78。
Adopting pure metals of Ti, Zr, V and Nb with the mass purity higher than 99.90 percent according to the weight ratio of Ti60.16Zr36.72V2.34Nb0.78Weighing the components in proportion; then, a non-consumable arc melting method is adopted to carry out multiple times of melting on the mixture ratio under the protection of argon gas so as to ensure the uniformity of alloy components, and the specific melting parameters are as follows: argon pressure of 0.04 +/-0.01 MPa and smelting current density of 200 +/-5A/cm2(ii) a Putting the master alloy into a vacuum ball mill, ball-milling for 60 hours at the rotating speed of 200r/min, and screening Ti with the granularity of 48-80 mu m by using a 300-mesh sieve60.16Zr36.72V2.34Nb0.78Alloy powder; and placing the alloy powder in an automatic powder feeder, and performing laser additive manufacturing of the alloy on a pure titanium or titanium alloy substrate by taking argon as protective gas. The optimized process parameters are as follows: the laser power is 2.1KW, the diameter of a light spot is 4mm, the scanning speed is 5mm/s, the powder feeding rate is 3.6g/min, the lap joint rate is 50 percent, and the argon flow is 9.0 lites/min.
XRD and SEM analysis showed as-deposited Ti60.16Zr36.72V2.34Nb0.78The structure is composed of a single phase β - (TiZr) solid solution with a grain size of 114 μm. The microhardness, the yield strength, the maximum compression strength and the strain capacity are HV408, 971MPa, 1184MPa and 55 percent respectively. The corrosion potential and the corrosion current in 1mol/l HCl corrosion medium are-0.22344V and 2.2166 x 10 respectively-7Amps/cm2. The average surface roughness was 1.2 μm.
Example 2
The alloy component is Ti58.59Zr36.72V2.34Nb2.35。
Adopting pure metals of Ti, Zr, V and Nb with the mass purity higher than 99.90 percent according to the weight ratio of Ti58.59Zr36.72V2.34Nb2.35Weighing the components in proportion; then using non-selfThe electric arc melting method is used for melting the mixture ratio for multiple times under the protection of argon to ensure the uniformity of alloy components, and the specific melting parameters are as follows: argon pressure of 0.04 +/-0.01 MPa and smelting current density of 200 +/-5A/cm2(ii) a Putting the master alloy into a vacuum ball mill, ball-milling for 60 hours at the rotating speed of 200r/min, and screening Ti with the granularity of 48-80 mu m by using a 300-mesh sieve58.59Zr36.72V2.34Nb2.35Alloy powder; and placing the alloy powder in an automatic powder feeder, and performing laser additive manufacturing of the alloy on a pure titanium or titanium alloy substrate by taking argon as protective gas. The optimized process parameters are as follows: the laser power is 2.3KW, the diameter of a light spot is 4mm, the scanning speed is 7mm/s, the powder feeding rate is 4g/min, the lap joint rate is 50 percent, and the argon flow is 9.0 lites/min.
XRD and SEM analysis showed as-deposited Ti58.59Zr36.72V2.34Nb2.35The structure is composed of a single phase β - (TiZr) solid solution with a grain size of 107 μm. The microhardness, the yield strength, the maximum compressive strength and the strain capacity are HV422, 1138MPa, 1283MPa and 52 percent respectively. The corrosion potential and the corrosion current in 1mol/l HCl corrosion medium are-0.18980V and 9.2578 x 10 respectively-8Amps/cm2. The average surface roughness was 1.3 μm.
Example 3
The alloy component is Ti57.03Zr36.72V2.34Nb3.91。
Adopting pure metals of Ti, Zr, V and Nb with the mass purity higher than 99.90 percent according to the weight ratio of Ti57.03Zr36.72V2.34Nb3.91Weighing the components in proportion; then, a non-consumable arc melting method is adopted to carry out multiple times of melting on the mixture ratio under the protection of argon gas so as to ensure the uniformity of alloy components, and the specific melting parameters are as follows: argon pressure of 0.04 +/-0.01 MPa and smelting current density of 200 +/-5A/cm2(ii) a Putting the master alloy into a vacuum ball mill, ball-milling for 60 hours at the rotating speed of 200r/min, and screening Ti with the granularity of 48-80 mu m by using a 300-mesh sieve57.03Zr36.72V2.34Nb3.91Alloy powder; placing the alloy powder in an automatic powder feeder, taking argon as protective gas inAnd carrying out laser additive manufacturing on the pure titanium or titanium alloy substrate. The optimized process parameters are as follows: the laser power is 2.5KW, the diameter of a light spot is 4mm, the scanning speed is 10mm/s, the powder feeding rate is 5g/min, the lap joint rate is 50 percent, and the argon flow is 9.0 lites/min.
XRD and SEM analysis showed as-deposited Ti57.03Zr36.72V2.34Nb3.91The structure is composed of a single-phase β - (TiZr) solid solution with a grain size of 100 μm. The microhardness, yield strength, maximum compressive strength and strain capacity are HV449, 1195MPa, 1350MPa and 49% respectively. The corrosion potential and the corrosion current in 1mol/l HCl corrosion medium are-0.17204V and 6.6601 x 10 respectively-8Amps/cm2. The average surface roughness was 2.2 μm.
TABLE 1 mechanical Properties of Ti-Zr-V-Nb alloys
TABLE 2 electrochemical Properties of Ti-Zr-V-Nb alloy in 1mol/l HCl
| Chemical composition | Ecorr(Volts) | Icorr(Amps/cm2) |
| Ti60.16Zr36.72V2.34Nb0.78 | -0.22344 | 2.2166×10-7 |
| Ti58.59Zr36.72V2.34Nb2.35 | -0.18980 | 9.2578×10-8 |
| Ti57.03Zr36.72V2.34Nb3.91 | -0.17204 | 6.6601×10-8 |
TABLE 3 surface roughness of Ti-Zr-V-Nb alloy
| Chemical composition | Ra(μm) |
| Ti60.16Zr36.72V2.34Nb0.78 | 1.2 |
| Ti58.59Zr36.72V2.34Nb2.35 | 1.3 |
| Ti57.03Zr36.72V2.34Nb3.91 | 2.2 |
TABLE 1 laser additive manufacturing of Ti60.16Zr36.72V2.34Nb0.78、Ti58.59Zr36.72V2.34Nb2.35And Ti57.03Zr36.72V2.34Nb3.91Of three optimised alloysMechanical properties. It can be seen that as the Nb content increases, the hardness, yield strength and maximum compressive strength of the as-deposited alloy increase, while the plasticity decreases.
TABLE 2 laser additive manufacturing of Ti60.16Zr36.72V2.34Nb0.78、Ti58.59Zr36.72V2.34Nb2.35And Ti57.03Zr36.72V2.34Nb3.91The electrochemical performance of the alloy is optimized by three methods. With the increase of the Nb content, the corrosion potential of the alloy in the deposition state is gradually increased, the corrosion current is gradually reduced, and the corrosion resistance of the alloy in the deposition state is gradually enhanced.
Table 3 laser additive manufacturing of Ti60.16Zr36.72V2.34Nb0.78、Ti58.59Zr36.72V2.34Nb2.35And Ti57.03Zr36.72V2.34Nb3.91The surface roughness of the alloy is optimized by three methods. It can be seen that as the Nb content increases, the surface roughness of the as-deposited alloy increases and the as-deposited alloy formability decreases.
Claims (2)
1. A novel Ti-Zr-V-Nb alloy for laser additive manufacturing is characterized in that: the Ti-Zr-V-Nb alloy for laser additive manufacturing comprises Ti, Zr, V and Nb elements, and the alloy atomic percent is (57.03-60.16%) Ti- (35.16-38.67%) Zr- (0.39-3.91%) V- (0.78-3.91%) Nb.
2. The Ti-Zr-V-Nb alloy for laser additive manufacturing according to claim 1, wherein: the Ti-Zr-V-Nb alloy for laser additive manufacturing comprises (57.03-60.16%) Ti-36.72% Zr-2.34% V- (0.78-3.91%) Nb in atomic percentage.
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| CN113046595A (en) * | 2021-03-17 | 2021-06-29 | 大连理工大学 | High-strength and high-toughness titanium alloy with good additive manufacturing forming performance and used at high temperature of 600 DEG C |
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| CN113046595A (en) * | 2021-03-17 | 2021-06-29 | 大连理工大学 | High-strength and high-toughness titanium alloy with good additive manufacturing forming performance and used at high temperature of 600 DEG C |
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