CN111549270A - Low-density high-strength high-plasticity high-entropy alloy material and preparation method thereof - Google Patents
Low-density high-strength high-plasticity high-entropy alloy material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a high-entropy alloy material with low density, high strength and high plasticity and a preparation method thereof, wherein the high-entropy alloy material comprises TiaVbZrcNbdXeWherein, a is 35-45 at%, b is 15-25 at%, c is 15-25 at%, d is 15-25 at%, e is 0-10 at%, X is one of Cr, Al and Mo; the preparation method comprises the steps of sequentially putting all metal raw materials into a water-cooled metal crucible according to the component ratio from low melting point to high melting point, placing sponge titanium at an intermediate copper mold, and arc-striking and smelting the metal raw materials in an oxygen-free environment until the metal raw materials are fully mixed and dissolved. The high-entropy alloy material provided by the invention structurally comprises a BCC structure, and the density of the alloy can be regulated and controlled by regulating the proportion of metal elements with different densities and adding an ultra-light metal element Al; meanwhile, the composite material has high strength and high plasticity in mechanical property and has great application potential.
Description
Technical Field
The invention belongs to the technical field of metal materials, and relates to a low-density high-strength high-plasticity high-entropy alloy material and a preparation method thereof.
Background
For thousands of years, the traditional alloy system is developed, which takes one or two components as a matrix, and improves the performance of the alloy by adding other trace elements, thereby meeting the production and living requirements, such as traditional iron-based, copper-based and aluminum-based alloys and the like. However, in the traditional single-principal-element alloy, with the addition of other trace elements, intermetallic compounds can be formed, so that the service performance of the alloy material is reduced, and the application of the traditional alloy is greatly limited; moreover, the selection of elements and the design types of the traditional alloy system tend to be saturated, and the traditional alloy can not meet special requirements.
Breaking the traditional alloy design concept to develop novel alloys is the goal pursued by metal materials scientists. As a multi-element alloy developed and prepared based on a design concept newly proposed in recent decades, the high-entropy alloy has a wider design space than a traditional metal taking one or two metal elements as main components, and shows higher strength and better processing plasticity as a structural material in mechanical properties.
In the prior art, research on high-entropy alloys has mainly focused on "cantor" high-entropy alloys composed of transition metal elements (C, Cr, Fe, Ni, and the like) and refractory high-entropy alloys composed of refractory elements (Nb, Ti, V, Ta, Hf, Zr, and the like). Among them, the refractory high-entropy alloy exhibits a body-centered cubic (BCC) structure in a crystal structure, and thus has high strength in mechanical properties, both at room temperature and at high temperature. Refractory high entropy alloys are widely regarded as the most valuable new materials for high temperature applications. However, the processing plasticity of the refractory high-entropy alloy is poor, and the industrial application of the refractory high-entropy alloy is severely limited; secondly, the density of the refractory high-entropy alloy is higher (>8.0g/cm3) This also makes it wasteful of energy. From the above, high-entropy alloys having high plasticity at room temperature, high strength and low density have become a hot point of research. However, currently, little work has been reported on this correlation.
The current common methods for preparing high-entropy alloys include fusion casting processes and mechanical alloying processes. Due to the fact that the element melting points of the low-density high-entropy alloy are different greatly, the chemical components of the prepared material are different greatly from the theoretical proportioning components by adopting a traditional smelting method; at present, most of low-density high-entropy alloys are prepared by adopting a mechanical alloying method, but the mechanical alloying has the defects of complex alloying process, poor compactness of sintered alloys, difficult treatment on special metals (Mg and Ti) and the like. Therefore, the preparation process of the low-density high-entropy alloy is not complete at present.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention makes up the defects of the prior art, provides the high-entropy alloy material with low density, high strength and high plasticity and the preparation method thereof, and has great application potential in the important fields of aerospace, marine ships, national defense and military and the like.
The invention adopts the following technical scheme:
the high-entropy alloy material with low density, high strength and high plasticity comprises TiaVbZrcNbdXe。
Wherein: a. b, c, d and e respectively correspond to the molar ratio of each element, wherein a is 35-45 at%, b is 15-25 at%, c is 15-25 at%, d is 15-25 at%, e is 0-10 at%, and X is one of Cr and Al.
In the technical scheme, the purity of titanium, vanadium, zirconium, niobium, chromium and aluminum in the high-entropy alloy material is more than or equal to 99.95%.
Specifically, in the above technical solution, the high-entropy alloy material is TiaVbZrcNbdWherein a is 40 at%, b is 20 at%, c is 20 at%, and d is 20 at%.
Specifically, in the above technical solution, the high-entropy alloy material is TiaVbZrcNbdCreWherein a is 40 at%, b is 20 at%, c is 20 at%, d is 10 at%, and e is 10 at%.
Specifically, in the above technical solution, the high-entropy alloy material is TiaVbZrcNbdAleWherein a is 40 at%, b is 20 at%, c is 20 at%, d is 10 at%, and e is 10 at%.
The invention also provides a preparation method of the high-entropy alloy material, which comprises the following steps: sequentially putting all metal raw materials into a water-cooled metal crucible according to the component proportion from low melting point to high melting point, putting the metal raw material with the lowest melting point on the bottom layer, putting the metal raw material with the highest melting point on the surface layer, putting sponge titanium on the middle copper mold, and striking arc to smelt the metal raw materials in an oxygen-free environment until the metal raw materials are fully mixed and dissolved.
In the technical scheme, the oxygen-free environment is realized through the processes of vacuumizing, filling argon gas, smelting titanium sponge and absorbing oxygen.
Specifically, in the technical scheme, the process of vacuumizing, argon filling and sponge titanium smelting oxygen absorption comprises the steps of vacuumizing by using a mechanical pump until the vacuum degree is less than 5Pa, then vacuumizing by using a molecular pump until the vacuum degree is less than 0.001Pa, then introducing argon with the purity of 99.99% to 0.05MPa, and finally arc-starting and sponge titanium smelting twice to absorb residual oxygen.
In the technical scheme, the arc-striking smelting frequency of the metal raw material is more than 6 times, and after each arc-striking smelting, the alloy in the crucible is turned over and then the next arc-striking smelting is carried out.
Specifically, in the above technical scheme, the melting time of each arc striking melting is 1.5-2.5min, and the arc striking melting of the metal raw material further includes magnetic stirring of the melt in addition to the first arc striking melting and the last arc striking melting.
In detail, in the technical scheme, the melting voltage and the melting current of the arc ignition melting are respectively 10-15V and 350-450A.
In a preferred embodiment, the preparation method of the high-entropy alloy material specifically comprises the following steps:
s1, respectively placing six kinds of high-purity metal raw material particles (Ti, V, Nb, Zr, Cr and Al) in an ultrasonic cleaning way for two times, then accurately weighing and proportioning the raw material particles according to the component proportion according to the molar ratio, sequentially placing the raw material particles into a water-cooling metal crucible from low to high in melting point sequence, placing the element with the lowest melting point on the bottom layer and the element with the highest melting point on the top layer, and simultaneously placing titanium sponge on the position of a middle copper mold;
S2closing the furnace door of the arc melting furnace, opening circulating water, opening a mechanical pump, vacuumizing, opening a molecular pump for further vacuumizing when the vacuum degree is lower than 5Pa, and when the vacuum degree is lower than 1.0 x 10-3Introducing high-purity argon (the pressure is about 0.05Mpa) as a protective gas when Pa is needed;
s3, arc striking is carried out under the atmosphere of high-purity argon, the titanium sponge is smelted for 2 times, and residual oxygen in the furnace is absorbed;
s4, firstly, adopting heavy current smelting (smelting voltage is 10-15V, smelting current is 350-450A), melting and uniformly mixing all metal particles, turning over the alloy button through a manipulator after the alloy button is cast and cooled, smelting in the same way, turning on magnetic stirring in each smelting process after the second time, turning over the alloy button for 180 degrees after each smelting, and smelting for 7 times in total to make the alloy components more uniform, and turning off the magnetic stirring during the last smelting to make the alloy into a smooth ingot;
and S5, opening the furnace door after the alloy button cast ingot is completely cooled, and taking out the sample.
Compared with the prior art, the invention has the following advantages:
(1) the invention provides a TiaVbZrcNbdXeThe series high-entropy alloy materials are prepared by a vacuum arc melting furnace, and the series high-entropy alloy materials comprise refractory metal elements such as titanium, vanadium, zirconium, niobium, chromium, aluminum and molybdenum, structurally contain BCC structures, and can regulate and control the density of the alloy by regulating the proportion of metal elements with different densities and adding an ultra-light metal element Al;
(2) ti provided by the inventionaVbZrcNbdXeThe series high-entropy alloy materials have lower density and simultaneously have high strength and high plasticity on the aspect of mechanical property, wherein, Ti40V20Zr20Nb20The actual test density is 5.89g/cm3Under the condition of quasi-static compression experiment, the yield strength at room temperature is 769MPa, the compressive plastic strain exceeds 50 percent, the yield strength at 600 ℃ is 660MPa, the compressive plastic is more than 50 percent, and Ti is40V20Zr20Nb10Cr10The actual test density is 5.75g/cm3Under the condition of quasi-static compression experiment, the room temperature yield strength is 1400MPa, the compressive plastic strain is 20 percent, the yield strength at 600 ℃ is 600MPa, the compressive plastic is more than 50 percent, and Ti40V20Zr20Nb10Al10The actual test density is 5.44g/cm3Under the condition of quasi-static compression experiment, the yield strength at room temperature is 1273MPa, the yield strength at 600 ℃ is 800MPa, and the compression plasticity is more than 50 percent.
Drawings
FIG. 1 shows Ti prepared in examples of the present inventionaVbZrcNbdXeX-ray diffraction patterns of the series of high-entropy alloy materials;
FIG. 2 shows Ti prepared in examples of the present invention40V20Zr20Nb20Compression stress strain curves of the high-entropy alloy material at room temperature and 600 ℃;
FIG. 3 shows Ti prepared in examples of the present invention40V20Zr20Nb10Cr10Compression stress strain curves of the high-entropy alloy material at room temperature and 600 ℃;
FIG. 4 shows Ti prepared in examples of the present invention40V20Zr20Nb10Al10Compression stress strain curves of the high-entropy alloy material at room temperature and 600 ℃.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.
The experimental procedures used in the following examples are conventional unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The embodiment of the invention provides TiaVbZrcNbdXeThe design and preparation method of the series high-entropy alloy material comprises the following steps:
1. composition design
Firstly, in order to obtain a refractory high-entropy alloy material with low density and high plasticity, a low-density refractory alloy element with intrinsic plasticity is selected, and the low-density refractory alloy element comprises titanium (rho)Ti＝4.54g/cm3) Vanadium (p)V＝6.11g/cm3) Zirconium (p)Zr＝6.50g/cm3) And niobium (p)Nb＝8.57g/cm3) And (4) elements. Secondly, to further reduce the alloy density, we choose chromium (ρ) with a lower densityCr＝7.22g/cm3) Elemental and ultra-light aluminum (p)Al＝2.70g/cm3) The element replaces niobium element in the alloy. Finally, in order to ensure that a single-phase solid solution structure is formed after alloying so as to avoid generating intermetallic compounds which damage the performance of the alloy, detailed calculation and analysis are carried out on thermodynamic and empirical criteria of the high-entropy alloy, so that the high-entropy alloy materials with different components are designed.
First, its stability is closely related to Gibbs free energy, as given by the Gibbs free energy equation:
ΔGmix＝ΔHmix-TΔSmix
the stability of the product is related to delta Hmix and delta Smix.
Multiple element mixing Δ Hmix、ΔSmixThe calculation formula is as follows:
c in formulae (1) and (2)i、jiThe mole fraction of the elements is shown, and R is a boltzmann constant.
Wherein, the formula (2) can be simplified as Δ SmixAs is known from the results of the study, Δ S ═ RlnmixMore than 1.5R is high-entropy alloy, namely delta S is more than or equal to 11J/(k mol)mix≤19.5J/(k·mol)，-22kJ/mol≤ΔHmix≤7kJ/mol。
In addition, the factors that determine whether a stable solid solution high entropy alloy can be formed include the atomic size difference () and the Valence Electron Concentration (VEC) that determines the type of crystal, which are calculated as follows:
in the formula: c. CiThe mole fraction of each element is; r isiIs the radius of each element; (VEC)iIs the valence electron concentration of each element.
Research shows that when the content is less than or equal to 6.4 percent, the stable solid solution high-entropy alloy can be formed. When the VEC is more than or equal to 8, the formed high-entropy alloy is of a face-centered cubic (FCC) solid solution structure; when VEC is less than or equal to 6.87, the formed high-entropy alloy is in a Body Centered Cubic (BCC) solid solution structure; when VEC is more than 6.87 and less than 8, the formed high-entropy alloy has a face-centered cubic (FCC) and body-centered cubic (BCC) coexisting crystal structure.
Finally, Ti is designed according to the difference of alloy densityaVbZrcNbd，TiaVbZrcNbdCre，TiaVbZrcNbdAleLow density refractory high entropy alloy.
By calculation, Ti is shown in Table 1 belowaVbZrcNbd，TiaVbZrcNbdCre，TiaVbZrcNbdAleLow density refractory high entropy alloys have the potential to form solid solutions of Body Centered Cubic (BCC) structure.
TABLE 1 thermodynamic parameter calculation results for refractory high-entropy alloys
Example 1
The embodiment of the invention provides Ti40V20Zr20Nb20The high-entropy alloy consists of four elements of Ti, V, Zr and Nb, wherein the relative atomic percentage of Ti atoms is 40%, the relative atomic percentage of V atoms is 20%, the relative atomic percentage of Zr atoms is 20%, and the relative atomic percentage of Nb atoms is 20%.
The Ti40V20Zr20Nb20The purity of the metal element raw material selected by the high-entropy alloy is higher than 99.95 at%.
The Ti40V20Zr20Nb20The preparation method of the high-entropy alloy comprises the following steps:
the method comprises the following steps: selecting four metal elements of Ti, V, Zr and Nb, and repeatedly cleaning high-purity metal particles for 2 times and 2min each time by using an ultrasonic cleaning machine; according to Ti40V20Zr20Nb20Accurately weighing four metal elements such as Ti, V, Zr, Nb and the like according to the atomic percentage of the high-entropy alloy; polishing a copper crucible of a vacuum arc melting furnace by using abrasive paper to show metallic luster, and cleaning by using ethanol; according to the sequence of the simple substance melting points of the metal raw materials from low to high, namely Ti, Zr, V and Nb, the metal raw materials are sequentially placed into a copper crucible of a vacuum arc melting furnace, and meanwhile, titanium sponge is placed at the position of an intermediate copper mold;
step two: closing the furnace door of the arc melting furnace, opening circulating water, opening a mechanical pump, vacuumizing, opening a molecular pump for further vacuumizing when the vacuum degree is lower than 5Pa, and when the vacuum degree is lower than 1.0 x 10-3When Pa is needed, introducing high-purity argon (the pressure is about 0.05Mpa) as a protective gas, carrying out arc striking under the atmosphere of the high-purity argon (99.99 wt%), smelting the titanium sponge for 2 times, absorbing residual oxygen in the furnace, turning over the titanium sponge into a button ingot by a manipulator for 180 degrees after smelting the titanium sponge into the button ingot, carrying out smelting again, and then carrying out Ti40V20Zr20Nb20Smelting the raw materials; in the smelting process, the smelting current and the tungsten electrode are adjusted, all the block elementary metal is firstly melted, all the metal raw materials are melted into molten metal, and then the molten metal is maintainedKeeping the smelting current at 350-450A, the smelting voltage at 10-15V and the smelting time at 2 min; then reducing the current, stopping arc striking, stopping smelting, and waiting until the molten metal is completely solidified and cooled to obtain an as-cast high-entropy alloy button ingot; turning the cast-state high-entropy alloy button ingot by 180 degrees through a manipulator, carrying out the next smelting by adopting the same method, totally carrying out seven times of smelting, and turning the ingot by 180 degrees after each smelting; wherein, when the 2 nd to 6 th smelting is carried out, magnetic stirring is required to be started, so that the high-entropy alloy button cast ingot is more uniform, and the magnetic stirring current is kept at 5-10A;
step three: and opening the furnace door after the alloy button cast ingot is completely cooled, and taking out the sample.
For Ti40V20Zr20Nb20XRD test and compression mechanical property test are carried out, wherein Ti40V20Zr20Nb20The high entropy alloy is a single phase BCC structure, as shown in FIG. 1.
The density of the alloy is measured to be 5.89g/cm by a weighing method3。
The compression mechanical property test was performed at room temperature and 600 ℃, respectively, and the results are shown in fig. 2. The alloy has room temperature yield strength of 769MPa, compression plasticity of more than 50% and specific strength of 130.56MPa cm3(ii)/g; meanwhile, the yield strength of the alloy at 600 ℃ is 660MPa, and the compression plasticity is more than 50%.
Example 2
The embodiment of the invention provides Ti40V20Zr20Nb10Cr10The high-entropy alloy consists of five metal elements of Ti, V, Zr, Nb and Cr, wherein the relative atomic percentage of Ti atoms is 40%, the relative atomic percentage of V atoms is 20%, the relative atomic percentage of Zr atoms is 20%, the relative atomic percentage of Nb atoms is 10%, and the relative atomic percentage of Cr atoms is 10%.
The Ti40V20Zr20Nb10Cr10The purity of the metal element raw material selected by the high-entropy alloy is higher than 99.95 at%.
The Ti40V20Zr20Nb10Cr10The preparation method of the high-entropy alloy comprises the following steps:
the method comprises the following steps: selecting five metal elements of Ti, V, Zr, Nb and Cr, and repeatedly cleaning high-purity metal particles for 2 times and 2min each time by using an ultrasonic cleaning machine; according to Ti40V20Zr20Nb10Cr10Accurately weighing five metal elements of Ti, V, Zr, Nb and Cr in atomic percentage of the high-entropy alloy; polishing a copper crucible of a vacuum arc melting furnace by using abrasive paper to show metallic luster, and cleaning by using ethanol; according to the sequence of the simple substance melting points of the metal raw materials from low to high, namely Ti, Zr, Cr, V and Nb, the metal raw materials are sequentially put into a copper crucible of a vacuum arc melting furnace, and meanwhile, titanium sponge is put at the position of an intermediate copper mold;
step two: closing the furnace door of the arc melting furnace, opening circulating water, opening a mechanical pump, vacuumizing, opening a molecular pump for further vacuumizing when the vacuum degree is lower than 5Pa, and when the vacuum degree is lower than 1.0 x 10-3When Pa is needed, introducing high-purity argon (the pressure is about 0.05Mpa) as a protective gas, carrying out arc striking under the atmosphere of the high-purity argon (99.99 wt%), smelting the titanium sponge for 2 times, absorbing residual oxygen in the furnace, turning over the titanium sponge into a button ingot by a manipulator for 180 degrees after smelting the titanium sponge into the button ingot, carrying out smelting again, and then carrying out Ti40V20Zr20Nb10Cr10Smelting the raw materials; in the smelting process, the smelting current and the tungsten electrode are adjusted, all the bulk elemental metal is firstly melted to melt all the metal raw materials into molten metal, then the smelting current is kept at 350-450A, the smelting voltage is 10-15V, and the smelting time is 2 min; then reducing the current, stopping arc striking, stopping smelting, and waiting until the molten metal is completely solidified and cooled to obtain an as-cast high-entropy alloy button ingot; turning the cast-state high-entropy alloy button ingot by 180 degrees through a manipulator, carrying out the next smelting by adopting the same method, totally carrying out seven times of smelting, and turning the ingot by 180 degrees after each smelting; wherein, when the 2 nd to 6 th smelting is carried out, magnetic stirring is required to be started, so that the high-entropy alloy button cast ingot is more uniform, and the magnetic stirring current is kept at 5-10A;
step three: and opening the furnace door after the alloy button cast ingot is completely cooled, and taking out the sample.
For Ti40V20Zr20Nb10Cr10XRD test and compression mechanical property test are carried out, wherein Ti40V20Zr20Nb10Cr10The high entropy alloy structure consists of BCC and Laves phases, as shown in FIG. 1.
The alloy was measured to have a density of 5.75g/cm by a weighing method3。
The compression mechanical property test was performed at room temperature and 600 ℃, respectively, and the results are shown in fig. 3. The alloy has yield strength at room temperature of 1400MPa, compression plasticity of 20% and specific strength of 243.48 MPa-cm3(ii)/g; meanwhile, the yield strength of the alloy at 600 ℃ is 600MPa, and the compression plasticity is more than 50%.
Example 3
The embodiment of the invention provides Ti40V20Zr20Nb10Al10The high-entropy alloy consists of five metal elements of Ti, V, Zr, Nb and Al, wherein the relative atom percentage of Ti atoms is 40%, the relative atom percentage of V atoms is 20%, the relative atom percentage of Zr atoms is 20%, the relative atom percentage of Nb atoms is 10%, and the relative atom percentage of Al atoms is 10%.
The Ti40V20Zr20Nb10Al10The purity of the metal element raw material selected by the high-entropy alloy is higher than 99.95 at%.
The Ti40V20Zr20Nb10Al10The preparation method of the high-entropy alloy comprises the following steps:
the method comprises the following steps: selecting five metal elements of Ti, V, Zr, Nb and Al, and repeatedly cleaning high-purity metal particles for 2 times and 2min each time by using an ultrasonic cleaning machine; according to Ti40V20Zr20Nb10Al10Accurately weighing five metal elements of Ti, V, Zr, Nb and Al in atomic percentage of the high-entropy alloy; polishing a copper crucible of a vacuum arc melting furnace by using abrasive paper to show metallic luster, and cleaning by using ethanol; according to the melting point of the simple substance of the metal raw material from low to high, namely Al, Ti, Zr, V and NbSequentially, sequentially putting metal raw materials into a copper crucible of a vacuum arc melting furnace, and simultaneously putting titanium sponge at the position of an intermediate copper mold;
step two: closing the furnace door of the arc melting furnace, opening circulating water, opening a mechanical pump, vacuumizing, opening a molecular pump for further vacuumizing when the vacuum degree is lower than 5Pa, and when the vacuum degree is lower than 1.0 x 10-3When Pa is needed, introducing high-purity argon (the pressure is about 0.05Mpa) as a protective gas, carrying out arc striking under the atmosphere of the high-purity argon (99.99 wt%), smelting the titanium sponge for 2 times, absorbing residual oxygen in the furnace, turning over the titanium sponge into a button ingot by a manipulator for 180 degrees after smelting the titanium sponge into the button ingot, carrying out smelting again, and then carrying out Ti40V20Zr20Nb10Al10Smelting the raw materials; in the smelting process, the smelting current and the tungsten electrode are adjusted, all the bulk elemental metal is firstly melted to melt all the metal raw materials into molten metal, then the smelting current is kept at 350-450A, the smelting voltage is 10-15V, and the smelting time is 2 min; then reducing the current, stopping arc striking, stopping smelting, and waiting until the molten metal is completely solidified and cooled to obtain an as-cast high-entropy alloy button ingot; turning the cast-state high-entropy alloy button ingot by 180 degrees through a manipulator, carrying out the next smelting by adopting the same method, totally carrying out seven times of smelting, and turning the ingot by 180 degrees after each smelting; wherein, when the 2 nd to 6 th smelting is carried out, magnetic stirring is required to be started, so that the high-entropy alloy button cast ingot is more uniform, and the magnetic stirring current is kept at 5-10A;
step three: and opening the furnace door after the alloy button cast ingot is completely cooled, and taking out the sample.
For Ti40V20Zr20Nb10Al10XRD test and compression mechanical property test are carried out, wherein Ti40V20Zr20Nb10Al10The structure of the high-entropy alloy is a single-phase BCC structure, as shown in FIG. 1.
The alloy was measured to have a density of 5.44g/cm by a weighing method3。
The compression mechanical property test was performed at room temperature and 600 ℃, respectively, and the results are shown in fig. 4. Chamber of the alloyThe warm yield strength is 1273MPa, the compression plasticity is more than 50 percent, and the specific strength is 234MPa cm3(ii)/g; meanwhile, the yield strength of the alloy at 600 ℃ is 800MPa, and the compression plasticity is more than 50%.
Finally, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A high-entropy alloy material with low density, high strength and high plasticity is characterized in that,
the high-entropy alloy material comprises TiaVbZrcNbdXe；
Wherein: a. b, c, d and e respectively correspond to the molar ratio of each element, wherein a is 35-45 at%, b is 15-25 at%, c is 15-25 at%, d is 15-25 at%, e is 0-10 at%, and X is one of Cr and Al.
2. A high entropy alloy material according to claim 1,
the purity of titanium, vanadium, zirconium, niobium, chromium and aluminum in the high-entropy alloy material is more than or equal to 99.95%.
3. A high entropy alloy material according to claim 1 or 2,
the high-entropy alloy material is Ti40V20Zr20Nb20、Ti40V20Zr20Nb10Cr10And Ti40V20Zr20Nb10Al10One kind of (1).
4. A method for producing a high-entropy alloy material as claimed in any one of claims 1 to 3,
sequentially putting all metal raw materials into a water-cooled metal crucible according to the component proportion from low melting point to high melting point, putting the metal raw material with the lowest melting point on the bottom layer, putting the metal raw material with the highest melting point on the surface layer, putting sponge titanium on the middle copper mold, and striking arc to smelt the metal raw materials in an oxygen-free environment until the metal raw materials are fully mixed and dissolved.
5. A method of producing a high-entropy alloy material according to claim 4,
the oxygen-free environment is realized through the processes of vacuumizing, filling argon gas and smelting titanium sponge for oxygen absorption.
6. A method of producing a high-entropy alloy material according to claim 5,
the process of vacuumizing, argon filling and smelting the sponge titanium for oxygen absorption specifically comprises the steps of vacuumizing by using a mechanical pump until the vacuum degree is less than 5Pa, then vacuumizing by using a molecular pump until the vacuum degree is less than 0.001Pa, then introducing argon with the purity of 99.99% to 0.05Mpa, finally arc striking and smelting the sponge titanium twice, and absorbing residual oxygen.
7. A method of producing a high-entropy alloy material according to claim 4,
the number of times of arc striking smelting of the metal raw materials is more than 6, and after each arc striking smelting, the alloy in the crucible is turned over and then the next arc striking smelting is carried out.
8. A method of producing a high-entropy alloy material according to claim 7,
the melting time of each arc striking melting is 1.5-2.5min, and besides the first arc striking melting and the last arc striking melting, the arc striking melting of the metal raw material also comprises the step of magnetically stirring the melt.
9. A method of producing a high-entropy alloy material according to claim 7 or 8,
the melting voltage and the melting current of the arc striking melting are respectively 10-15V and 350-450A.
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Cited By (11)
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| CN112501485A (en) * | 2020-11-16 | 2021-03-16 | 北京理工大学 | Reversible room-temperature hydrogen storage high-entropy alloy, and preparation and application thereof |
| CN112553488A (en) * | 2020-12-16 | 2021-03-26 | 湘潭大学 | CrAlNbTiVZr high-entropy alloy material and preparation method thereof |
| CN113151725A (en) * | 2020-12-02 | 2021-07-23 | 西北工业大学 | Method for enhancing wear resistance of refractory high-entropy alloy |
| CN113462948A (en) * | 2021-06-30 | 2021-10-01 | 哈尔滨工程大学 | ZrTiNbAlV low-neutron absorption cross-section refractory high-entropy alloy and preparation method thereof |
| CN113528919A (en) * | 2021-03-31 | 2021-10-22 | 合肥工业大学 | Ti-V-Cr-W series refractory high-entropy alloy with excellent mechanical property and preparation method thereof |
| CN113652591A (en) * | 2021-07-22 | 2021-11-16 | 中国科学院金属研究所 | Ti-rich high-entropy alloy with high specific strength, high plasticity and high toughness and preparation thereof |
| CN114164425A (en) * | 2021-11-11 | 2022-03-11 | 昆明理工大学 | Preparation method of low-density refractory high-entropy alloy cladding layer for laser cladding |
| CN115233072A (en) * | 2022-06-24 | 2022-10-25 | 大连理工大学 | Ti-V-Zr-Nb-Al-Ta-Hf light high-strength high-entropy alloy and preparation method thereof |
| CN115595488A (en) * | 2022-10-20 | 2023-01-13 | 上海大学（Cn） | Low-density medium-entropy alloy with low neutron absorption and preparation method and application thereof |
| CN115862783A (en) * | 2022-12-07 | 2023-03-28 | 哈尔滨工业大学 | Theoretical calculation design method of high-entropy alloy coating with adjustable thermal expansion coefficient |
| CN116043090A (en) * | 2022-12-28 | 2023-05-02 | 东莞理工学院 | Ti-Zr-Nb-Mo-V series high-strength high-entropy alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112501485B (en) * | 2020-11-16 | 2022-04-12 | 北京理工大学 | Reversible room-temperature hydrogen storage high-entropy alloy, and preparation and application thereof |
| CN112501485A (en) * | 2020-11-16 | 2021-03-16 | 北京理工大学 | Reversible room-temperature hydrogen storage high-entropy alloy, and preparation and application thereof |
| CN113151725A (en) * | 2020-12-02 | 2021-07-23 | 西北工业大学 | Method for enhancing wear resistance of refractory high-entropy alloy |
| CN112553488A (en) * | 2020-12-16 | 2021-03-26 | 湘潭大学 | CrAlNbTiVZr high-entropy alloy material and preparation method thereof |
| CN112553488B (en) * | 2020-12-16 | 2022-05-31 | 湘潭大学 | CrAlNbTiVZr high-entropy alloy material and preparation method thereof |
| CN113528919A (en) * | 2021-03-31 | 2021-10-22 | 合肥工业大学 | Ti-V-Cr-W series refractory high-entropy alloy with excellent mechanical property and preparation method thereof |
| CN113462948A (en) * | 2021-06-30 | 2021-10-01 | 哈尔滨工程大学 | ZrTiNbAlV low-neutron absorption cross-section refractory high-entropy alloy and preparation method thereof |
| CN113652591A (en) * | 2021-07-22 | 2021-11-16 | 中国科学院金属研究所 | Ti-rich high-entropy alloy with high specific strength, high plasticity and high toughness and preparation thereof |
| CN114164425A (en) * | 2021-11-11 | 2022-03-11 | 昆明理工大学 | Preparation method of low-density refractory high-entropy alloy cladding layer for laser cladding |
| CN115233072A (en) * | 2022-06-24 | 2022-10-25 | 大连理工大学 | Ti-V-Zr-Nb-Al-Ta-Hf light high-strength high-entropy alloy and preparation method thereof |
| CN115595488A (en) * | 2022-10-20 | 2023-01-13 | 上海大学（Cn） | Low-density medium-entropy alloy with low neutron absorption and preparation method and application thereof |
| CN115595488B (en) * | 2022-10-20 | 2023-09-29 | 上海大学 | Low-neutron-absorption low-density medium-entropy alloy and preparation method and application thereof |
| CN115862783A (en) * | 2022-12-07 | 2023-03-28 | 哈尔滨工业大学 | Theoretical calculation design method of high-entropy alloy coating with adjustable thermal expansion coefficient |
| CN115862783B (en) * | 2022-12-07 | 2023-09-19 | 哈尔滨工业大学 | Theoretical calculation design method of high-entropy alloy coating with adjustable thermal expansion coefficient |
| CN116043090A (en) * | 2022-12-28 | 2023-05-02 | 东莞理工学院 | Ti-Zr-Nb-Mo-V series high-strength high-entropy alloy and preparation method thereof |
| CN116043090B (en) * | 2022-12-28 | 2024-04-26 | 东莞理工学院 | Ti-Zr-Nb-Mo-V series high-strength high-entropy alloy and preparation method thereof |
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