A high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation and its preparation method

Abstract

The present invention provides a high-strength and tough FCC / BCC duplex refractory high-entropy alloy with L12 coherent precipitation and a preparation method thereof, belonging to the technical field of metal materials, including elements W, Ta, Al, Ti, Fe and Ni, and the atomic percentages (at.%) of its alloy components are expressed as W x Ni y Fe z Al m Ti n Ta e , where x = 29.2 - 33.3%, y = 40.6 - 44.5%, z = 19.4 - 25.0%, m = 0 - 3.9%, n = 0 - 1.4%, e = 1.1 - 4.2%, x + y + z + m + n + e = 100%, and 2.8% < m + n + e < 6.7%. The material performance indexes are: room-temperature tensile yield strength > 1200 MPa, tensile strength > 1500 MPa, and elongation > 7%. The present invention effectively improves the problem that in tungsten-containing alloys, due to the easy formation of brittle BCC phases rich in tungsten and the easy precipitation of intermetallic compounds with other elements, the plasticity of the alloy deteriorates, through the cluster-type composition design method and the principle of multi-principal element alloying. By coherently precipitating L12 nanoparticles on the FCC matrix in the tungsten-containing refractory high-entropy alloy, a good match between high strength and ductility can be achieved, and it is a high-strength and tough FCC / BCC duplex refractory high-entropy alloy.

Description

Technical Field

[0001] This invention belongs to the field of metallic materials technology and relates to a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation and its preparation method. Its room temperature yield strength reaches 1200MPa, tensile strength exceeds 1500MPa, and elongation exceeds 7.0%. Background Technology

[0002] With the further development of the aerospace field, alloys are required to operate in increasingly harsh high-temperature environments, placing higher demands on their various physical, chemical, and mechanical properties. For a wide range of critical applications such as aero-engines and nuclear fusion reactors, materials must possess high heat resistance, good plasticity, resistance to high-temperature oxidation, corrosion resistance, and long-term thermal stability. For decades, the materials science community has been seeking materials that combine superior strength, plasticity, and heat resistance, such as tungsten alloys and nickel-based superalloys. However, for currently popular nickel-based superalloys, the unstable precipitated phases above 1423K lead to a significant decrease in strength, no longer meeting service requirements. In tungsten alloys, the easy formation of brittle BCC phases rich in tungsten, and the easy precipitation of intermetallic compounds by other elements, deteriorates the alloy's plasticity. Extensive experience has demonstrated that traditional single-principal-element metallurgical design methods are insufficient for developing high-performance materials with a strong plasticity balance and high-temperature stability. In this context, high-entropy alloys have attracted attention due to their excellent mechanical properties.

[0003] Unlike traditional alloys, high-entropy alloys are characterized by the simultaneous presence of multiple major constituent elements, typically mixed in equimolar or near-equimolar proportions. This mixing results in a high-entropy effect, making the alloys more prone to forming simple structures, such as BCC, FCC, hexagonal close-packed (HCP) solid solutions, and their ordered superstructures. These are a new type of compositionally complex alloys, promising to develop into novel high-performance engineering alloys suitable for extreme environments, and providing a new compositional platform for alloy microstructure design. Compared to other traditional engineering materials, high-entropy alloys possess many unique properties, such as high specific strength, soft magnetic properties, and damping properties. Notably, nanoparticle precipitation strengthening in high-entropy alloys can positively impact both strength and ductility, opening up greater possibilities for the synergistic control of multiple alloy properties. Precipitation of paramagnetic L12 nanoparticles in a ferromagnetic face-centered cubic matrix, or ferromagnetic body-centered cubic nanoparticles in a B2 matrix, can impart excellent mechanical and soft magnetic properties to Al / Ta-containing Co-Fe-Ni-based high-entropy alloys. However, this method is far from effective for refractory high-entropy alloys (RHEAs), which are primarily used in high-temperature structural applications. This is because equimolar mixing of elements in BCC-based RHEAs tends to lead to the separation of the two BCC phases, and the precipitation of inherently brittle intermetallic compounds results in changes in the alloy's mechanical properties. Further adjustments and optimizations to the alloy composition and preparation process are still needed to control the alloy's microstructure and obtain tungsten-containing RHEAs with high strength and good ductility.

[0004] Therefore, ensuring good plasticity and microstructural stability of the alloy while achieving high strength is the main bottleneck in designing tungsten-containing refractory high-entropy alloys. In view of this, this invention employs the applicant's unique cluster-based compositional design method and adopts a multi-principal element alloying principle to ultimately provide a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation. Its room temperature yield strength reaches 1200 MPa, tensile strength exceeds 1500 MPa, and elongation exceeds 7.0%. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention designs and develops a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with coherent L12 phase precipitation. The purpose of this invention is to utilize the vast compositional space brought about by multi-principal element alloying to design an FCC+BCC dual-phase structure, and to achieve a combination of high strength and ductility in a refractory high-entropy alloy by coherently precipitating L12 nanoparticles on an FCC matrix.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation, comprising W, Ta, Al, Ti, Fe, and Ni elements, is expressed as W in atomic percentage (at.%). x Ni y Fe z Al m Ti n Ta e , where x=29.2~33.3%, y=40.6~44.5%, z=19.4~25.0%, m=0~3.9%, n=0~1.4%, e=1.1~4.2%, x+y+z+m+n+e=100%, and 2.8% <m+n+e<6.7%。

[0008] Furthermore, the aforementioned high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with coherent L12 phase precipitation possesses a unique microstructure: the alloy matrix consists of an FCC+BCC dual phase, in which L12 nanoparticles coherently precipitate on the FCC matrix, and after long-term aging at 750℃, the nanoparticles do not undergo significant coarsening, exhibiting excellent high-temperature microstructure stability. The typical properties of the aforementioned high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with coherent L12 phase precipitation are: room temperature tensile yield strength > 1200 MPa, tensile strength > 1500 MPa, and elongation > 7%.

[0009] The concept behind the above technical solution is to utilize the applicant's cluster composition design method to design the composition of a high-strength, high-toughness, dual-phase refractory high-entropy alloy with L12 phase coherent precipitation. This composition design method is based on a "cluster + connecting atom" structural model, dividing the stable solid solution structure into two parts: clusters and connecting atoms. A cluster is a nearest-neighbor coordination polyhedron formed around a specific atom. For example, in the BCC structure, the cluster is a rhombic dodecahedron with a coordination number of 14, composed of 8 atoms in the nearest-neighbor shell and 6 atoms in the second-nearest-neighbor shell. This allows for the determination of a simple cluster composition formula: [cluster] (connecting atoms). X This means that a cluster is matched with a number of X connecting atoms. This cluster composition design method has been successfully applied to the composition design of high-entropy alloys, providing new ideas and methods for the composition design of high-performance engineering alloys.

[0010] Designing high-entropy alloys using the cluster component method has significantly improved the efficiency of developing high-performance alloys. However, to form a high-strength and tough FCC / BCC dual-phase refractory high-entropy alloy with L12-phase coherent precipitation, it is necessary to achieve its high tensile strength and good elongation through a microstructure of multiphase cooperative precipitation. In the W, Ta, Al, Ti, Fe, and Ni alloy system, according to the element effects and the mixing enthalpy between elements and matrix elements, the elements containing Al, Ti, and Ta can be classified as Al-like elements. In the new high-temperature high-entropy alloys, Al-like elements mainly form L12 coherent strengthening phases, determining the content, precipitation temperature, and precipitation rate of the L12 phase. Among them, Al is the main element forming the L12 phase, and at high temperatures, it will form a protective film on the metal surface, improving the oxidation resistance and corrosion resistance of the alloy; too high Ti content will form harmful η phases, and at the same time, it will increase the dissolution temperature of the L12 phase and narrow the hot processing window; too high Ta content will enrich on the FCC matrix and promote the precipitation of γ" nanoparticles and other brittle phases such as δ. The precipitation of harmful phases will seriously affect the high-temperature stability of the FCC / L12 coherent microstructure. To meet the requirements of both high tensile strength and good plasticity of the alloy, while limiting the content, it is necessary to ensure 2.8% < Al + Ti + Ta < 6.7% to avoid the precipitation of harmful phases and ensure excellent high-temperature microstructure stability and mechanical properties. Finally, we determined a high-strength and tough FCC / BCC dual-phase refractory high-entropy alloy with L12-phase coherent precipitation, and the atomic percentage (at.%) of its alloy composition is expressed as W x Ni y Fe z Al m Ti n Ta e , where x = 29.2 - 33.3%, y = 40.6 - 44.5%, z = 19.4 - 25.0%, m = 0 - 3.9%, n = 0 - 1.4%, e = 1.1 - 4.2%, x + y + z + m + n + e = 100%, and 2.8% < m + n + e < 6.7%.

[0011] The preparation method of this invention is as follows: First, high-purity component raw materials are prepared according to mass percentage (wt.%); the prepared pure metal material is placed in a water-cooled copper crucible in an electric arc melting furnace, and then melted using a non-consumable arc melting method under an argon protective atmosphere. Each alloy ingot is repeatedly melted at least 8 times, with a maximum current of 500A and a melting time of 15 minutes each time to ensure the uniformity of chemical composition, and finally, alloy ingots are obtained. The mass loss of each alloy during the entire preparation process does not exceed 0.1%; Second, the alloy ingots are homogenized in a muffle furnace at 1200℃ for 4-6 hours, and then subjected to multi-pass unidirectional hot rolling with a single reduction of 0.1-1 mm and a total hot rolling reduction of 50-60%; After hot rolling, multi-pass unidirectional cold rolling is continued with a single reduction of 0.1-0.5 mm and a total cold rolling reduction of 60-80%; Finally, after solution treatment at 900℃ for 5-30 minutes, the final sample is obtained.

[0012] The microstructure and structure of the alloy were examined using metallographic microscopy (OM), scanning electron microscopy (SEM), electron probe microanalysis (EPMA), transmission electron microscopy (TEM), and X-ray diffraction (XRD, Cu Kα radiation, λ = 0.15406 nm). Hardness was tested using an HVS-1000 Vickers hardness tester. The density of the alloy was measured using an XS64 solid density balance. Room temperature tensile mechanical properties were tested using a UTM5504 electronic universal tensile testing machine. Based on these findings, the present invention is identified as a high-strength, high-toughness, dual-phase refractory high-entropy alloy with coherent L12 phase precipitation, as described above. The atomic percentage (at.%) of its alloy composition is expressed as W. x Ni y Fe z Al m Ti n Ta e , where x=29.2~33.3%, y=40.6~44.5%, z=19.4~25.0%, m=0~3.9%, n=0~1.4%, e=1.1~4.2%, x+y+z+m+n+e=100%, and 2.8% <m+n+e<6.7%。

[0013] The microstructure and performance characteristics of the high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with coherent L12 phase precipitation are as follows: the alloy matrix is ​​composed of FCC+BCC dual phases, in which L12 nanoparticles are coherently precipitated on the FCC matrix, and the nanoparticles do not undergo significant coarsening after long-term aging at 750℃, exhibiting excellent high-temperature microstructure stability; room temperature tensile yield strength >1200MPa, tensile strength >1500MPa, and elongation >7%.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] (1) This invention designs and develops a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with coherent precipitation of L12 phase based on our self-developed cluster composition method. By adjusting the proportion of multi-principal alloying elements, the alloy composition that satisfies both high strength and good plasticity is controlled. At the same time, the microstructure and mechanical properties are controlled and optimized, and composition control criteria are established, thus eliminating the cumbersome empirical alloy design method of the current "cooking" approach. It effectively improves the problem of alloy plasticity deterioration caused by the easy formation of brittle BCC phase with rich W in W alloys and the easy precipitation of intermetallic compounds by other elements. Thus, a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy is developed using the multi-principal alloying mode of high-entropy alloys and coherent precipitation of L12 nanoparticles.

[0016] (2) Through alloy design, the proportion of the alloy's constituent elements is made reasonable, thereby achieving a high tensile strength and good plasticity matching of tungsten-containing refractory high-entropy alloy in a multi-principal system.

[0017] (3) The coherent precipitation of L12 nanoparticles enables tungsten-containing refractory high-entropy alloys to have high strength, good plasticity, high-temperature oxidation resistance and high-temperature structural stability at both room temperature and high temperature, and is expected to be used in high-temperature environments. Attached Figure Description

[0018] Figure 1 W prepared in Example 1 33.3 Ni 44.5 Fe 19.4 Ta 2.8 (at.%) The microstructure of the as-cast BSE alloy is as follows: The microstructure in the as-cast state is FCC+BCC structure, and there are no other precipitates present.

[0019] Figure 2 W prepared in Example 1 33.3 Ni 44.5 Fe 19.4 Ta 2.8 (at.%) The room temperature tensile properties curve of the alloy after rolling and solution treatment at 900℃ for 5 min shows that the alloy has a yield strength of 1331 MPa, a tensile strength of 1522 MPa, and an elongation of δ = 7.1% at room temperature. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below with reference to the technical solution.

[0021] Example 1: W 33.3 Ni 44.5 Fe 19.4 Ta 2.8 (at.%) alloy

[0022] Step 1: Alloy Preparation

[0023] This invention discloses a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation, W 33.3 Ni 44.5 Fe 19.4 Ta 2.8 (at.%) alloy. This high-entropy alloy uses high-purity component raw materials, with elements proportioned according to the alloy composition. The prepared pure alloy material is placed in a water-cooled copper crucible in an electric arc melting furnace, and then melted using a non-consumable arc melting method under an argon protective atmosphere. Each alloy ingot is repeatedly melted 8 times, with a maximum current of 500A and a melting time of 15 minutes each time to ensure the uniformity of chemical composition. The final alloy ingot is obtained, and the mass loss of each alloy during the entire preparation process does not exceed 0.1%. Next, the alloy ingot is homogenized in a muffle furnace at 1200℃ / 6h, followed by multi-pass unidirectional hot rolling on a rolling mill, with a single reduction of 0.1mm and a total hot rolling reduction of 60%. After hot rolling, multi-pass unidirectional cold rolling is continued, with a single reduction of 0.5mm and a total cold rolling reduction of 80%. Finally, it undergoes solution treatment at 900℃ / 30min.

[0024] Step 2: Alloy microstructure and property testing

[0025] The microstructure of the stabilized alloy was examined using OM, SEM, EPMA, TEM, and XRD. The results showed that the alloy of the present invention has a specific microstructure: the alloy matrix consists of an FCC+BCC dual phase (see attached figure). Figure 1 L12 nanoparticles coherently precipitate on the FCC matrix, and the nanoparticles do not show significant coarsening after long-term aging at 750℃, exhibiting excellent high-temperature structural stability. The tensile properties at room temperature were measured using a UTM5504 electronic universal tensile testing machine. After solution treatment at 900℃ for 30 min after rolling, the alloy achieved a yield strength of 1331 MPa, a tensile strength of 1522 MPa, and an elongation of δ = 7.1% at room temperature.

[0026] Example 2: W 30.5 Ni 40.6 Fe 22.2 Al 3.9 Ti 1.4 Ta 1.4 (at.%) alloy

[0027] Step 1: Alloy Preparation

[0028] This invention discloses a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation, W 30.5 Ni 40.6 Fe22.2 Al 3.9 Ti 1.4 Ta 1.4 (at.%) alloy. This high-entropy alloy uses high-purity component raw materials, with elements proportioned according to the alloy composition. The prepared pure alloy material is placed in a water-cooled copper crucible in an electric arc melting furnace, and then melted using a non-consumable arc melting method under an argon protective atmosphere. Each alloy ingot is repeatedly melted 8 times, with a maximum current of 500A and a melting time of 15 minutes per melting to ensure chemical composition homogeneity. The final alloy ingot is obtained, and the mass loss of each alloy during the entire preparation process does not exceed 0.1%. Next, the alloy ingot is homogenized in a muffle furnace at 1200℃ / 4h, followed by multi-pass unidirectional hot rolling with a single reduction of 1mm and a total hot rolling reduction of 50%. After hot rolling, multi-pass unidirectional cold rolling is continued with a single reduction of 0.1mm and a total cold rolling reduction of 60%. Finally, it undergoes solution treatment at 900℃ / 5min.

[0029] Step 2: Testing of alloy microstructure and mechanical properties

[0030] The microstructure of the stabilized alloy was detected using OM, SEM, EPMA, TEM, and XRD. The results showed that the alloy of the present invention has a specific microstructure: the alloy matrix is ​​composed of FCC+BCC dual phases, in which L12 nanoparticles are coherently precipitated on the FCC matrix, and the nanoparticles do not undergo significant coarsening after long-term aging at 750℃, exhibiting excellent high-temperature microstructure stability. The tensile properties at room temperature were measured using a UTM5504 electronic universal tensile testing machine. After solution treatment at 900℃ for 5 min after rolling, the alloy achieved a yield strength of 1256 MPa, a tensile strength of 1532 MPa, and an elongation of δ = 7.9% at room temperature.

[0031] Example 3: W 30.6 Ni 44.5 Fe 19.4 Al 3.3 Ti 1.1 Ta 1.1 (at.%) alloy

[0032] Step 1: Alloy Preparation

[0033] This invention discloses a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation, W 30.6 Ni 44.5 Fe 19.4 Al 3.3 Ti 1.1 Ta 1.1(at.%) alloy. This high-entropy alloy uses high-purity component raw materials, with elements proportioned according to the alloy composition. The prepared pure alloy material is placed in a water-cooled copper crucible in an electric arc melting furnace, and then melted using a non-consumable arc melting method under an argon protective atmosphere. Each alloy ingot is repeatedly melted 8 times, with a maximum current of 500A and a melting time of 15 minutes each time to ensure the uniformity of chemical composition. The final alloy ingot is obtained, and the mass loss of each alloy during the entire preparation process does not exceed 0.1%. Next, the alloy ingot is homogenized in a muffle furnace at 1200℃ / 5h, followed by multi-pass unidirectional hot rolling on a rolling mill, with a single reduction of 0.3mm and a total hot rolling reduction of 55%. After hot rolling, multi-pass unidirectional cold rolling is continued, with a single reduction of 0.3mm and a total cold rolling reduction of 70%. Finally, it undergoes solution treatment at 900℃ / 20min.

[0034] Step 2: Testing of alloy microstructure and mechanical properties

[0035] The microstructure of the stabilized alloy was detected using OM, SEM, EPMA, TEM, and XRD. The results showed that the alloy of the present invention has a specific microstructure: the alloy matrix is ​​composed of FCC+BCC dual phases, in which L12 nanoparticles are coherently precipitated on the FCC matrix, and the nanoparticles do not undergo significant coarsening after long-term aging at 750℃, exhibiting excellent high-temperature microstructure stability. The tensile properties at room temperature were measured using a UTM5504 electronic universal tensile testing machine. After solution treatment at 900℃ for 20 min after rolling, the alloy achieved a yield strength of 1215 MPa and a tensile strength of 1578 MPa at room temperature, with an elongation δ = 9.5%.

[0036] Example 4: W 29.2 Ni 41.6 Fe 25.0 Ta 4.2 (at.%) alloy

[0037] Step 1: Alloy Preparation

[0038] This invention discloses a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation, W 29.2 Ni 41.6 Fe 25.0 Ta 4.2(at.%) alloy. This high-entropy alloy uses high-purity component raw materials, with elements proportioned according to the alloy composition. The prepared pure alloy material is placed in a water-cooled copper crucible in an electric arc melting furnace, and then melted using a non-consumable arc melting method under an argon protective atmosphere. Each alloy ingot is repeatedly melted 8 times, with a maximum current of 500A and a melting time of 15 minutes each time to ensure the uniformity of chemical composition. The final alloy ingot is obtained, and the mass loss of each alloy during the entire preparation process does not exceed 0.1%. Next, the alloy ingot is homogenized in a muffle furnace at 1200℃ / 6h, followed by multi-pass unidirectional hot rolling on a rolling mill, with a single reduction of 0.1mm and a total hot rolling reduction of 60%. After hot rolling, multi-pass unidirectional cold rolling is continued, with a single reduction of 0.5mm and a total cold rolling reduction of 80%. Finally, it undergoes solution treatment at 900℃ / 30min.

[0039] Step 2: Alloy microstructure and property testing

[0040] The microstructure of the stabilized alloy was examined using OM, SEM, EPMA, TEM, and XRD. The results showed that the alloy of the present invention has a specific microstructure: the alloy matrix consists of an FCC+BCC dual phase (see attached figure). Figure 1 L12 nanoparticles coherently precipitate on the FCC matrix, and the nanoparticles do not show significant coarsening after long-term aging at 750℃, exhibiting excellent high-temperature microstructure stability. The tensile properties at room temperature were measured using a UTM5504 electronic universal tensile testing machine. After solution treatment at 900℃ for 30 min after rolling, the alloy achieved a yield strength of 1370 MPa and a tensile strength of 1504 MPa at room temperature, with an elongation δ = 7.0%.

[0041] The above-described embodiments are merely illustrative of the implementation methods of the present invention, but should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation, characterized in that: The high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy comprises W, Ta, Al, Ti, Fe, and Ni elements, and its atomic percentage (at.%) is expressed as W. x Ni y Fe z Al m Ti n Ta e , where x=29.2~33.3%, y=40.6~44.5%, z=19.4~25.0%, m=0~3.9%, n=0~1.4%, e=1.1~4.2%, x+y+z+m+n+e=100%, and 2.8% <m+n+e<6.7%。 2. The high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation according to claim 1, characterized in that, The high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy has a unique microstructure: the alloy matrix is ​​composed of FCC+BCC dual phases, in which L12 nanoparticles are coherently precipitated on the FCC matrix, and the nanoparticles do not undergo significant coarsening after long-term aging at 750℃, exhibiting excellent high-temperature microstructure stability. It is a refractory high-entropy alloy that combines high strength and ductility.

3. A high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation according to claim 1 or 2, characterized in that, The high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation has a room temperature tensile yield strength >1200MPa, a tensile strength >1500MPa, and an elongation >7%.

4. The method for preparing a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy with L12 phase coherent precipitation according to claim 1, 2, or 3, characterized in that, The preparation method includes the following steps: First, each alloy component is melted multiple times in a vacuum arc melting furnace according to its mass percentage, with a maximum current of 500A and a melting time of 15 minutes each time to ensure the uniformity of chemical composition, ultimately obtaining an alloy ingot; Second, the alloy ingot is homogenized in a muffle furnace at 1200℃ for 4-6 hours, followed by multiple passes of unidirectional hot rolling on a rolling mill, with a single reduction of 0.1-1 mm and a total hot rolling reduction of 50-60%; After hot rolling, multiple passes of unidirectional cold rolling are continued, with a single reduction of 0.1-0.5 mm and a total cold rolling reduction of 60-80%; Finally, a solution treatment is performed at 900℃ for 5-30 minutes to obtain a high-strength and high-toughness FCC / BCC dual-phase refractory high-entropy alloy.

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