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Structure and function integrated high-entropy alloy and preparation method thereof

A high-entropy alloy and functional technology, applied in the field of new high-entropy alloy and its preparation, can solve the problems of high cost, poor plasticity at room temperature, high alloy density, etc., and achieve improved elongation, improved yield strength level, and good plastic deformation ability. Effect

Active Publication Date: 2020-10-16
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the current typical BCC structure refractory high-entropy alloys such as TaNbMoW, TaNbMoWV, etc. contain a large amount of high-density metal elements, the alloy has high density, high cost, poor room temperature plasticity, and is difficult to be used as a bottleneck problem for structural materials. The neutron high-entropy alloy research has not given enough attention, the present invention proposes a high-entropy alloy based on the Al-Nb-Zr-Mo-V-Hf system, and fully considers the special effect of the Hf element, thereby realizing the high-entropy alloy The structural and functional integration of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A new structure-function integrated refractory high-entropy Al-Nb-Zr-Mo-V-Hf alloy, the specific alloy composition is: 4 at.%Al, 45%Zr, 30%Nb, 10%Mo, 1%V, 10% Hf, the rest are unavoidable impurity elements.

[0025] The preparation method of the novel refractory high-entropy Al-Nb-Zr-Mo-V-Hf alloy of the present embodiment is:

[0026] (1) Prepare raw materials: Weigh the required alloy raw materials according to the proportion of the new refractory high-entropy Al-Nb-Zr-Mo-V-Hf alloy. The specific alloy composition is: 4 at.% Al, 45 Zr, 30 % Nb, 10% Mo, 1% V, 10% Hf;

[0027] (2) Arc melting: Under the protection of protective gas, Al, Zr, Nb, Mo, V, Zr-Hf intermediate alloys were heated and melted rapidly; in order to obtain alloy ingots with uniform composition, all samples were smelted five times repeatedly, each The samples were turned over after all smelting. In order to avoid possible effects on the microstructure and properties of the sample due to difference...

Embodiment 2

[0030] A new refractory high-entropy Al-Nb-Zr-Mo-V-Hf alloy with integrated structure and function, the specific alloy composition is: 10 at.%Al, 60% Zr, 20% Nb, 5% Mo, 4.99% V, 0.01% Hf, and the rest are unavoidable impurity elements.

[0031] The preparation method of the novel refractory high-entropy Al-Nb-Zr-Mo-V-Hf alloy of the present embodiment is:

[0032] (1) Prepare raw materials: Weigh the required alloy raw materials according to the proportion of the new refractory high-entropy Al-Nb-Zr-Mo-V-Hf alloy. The specific alloy composition is: 10 at.% Al, 60% Zr, 20% Nb, 5% Mo, 4.99% V, 0.01% Hf;

[0033] (2) Arc melting: Under the protection of protective gas, Al, Zr, Nb, Mo, V, Zr-Hf intermediate alloys were heated and melted rapidly; in order to obtain alloy ingots with uniform composition, all samples were smelted five times repeatedly, each The samples were turned over after all smelting. In order to avoid possible effects on the microstructure and performance of th...

Embodiment 3

[0036] A new refractory high-entropy Al-Nb-Zr-Mo-V-Hf alloy with integrated structure and function, the specific alloy composition is: 15 at.%Al, 39% Zr, 20% Nb, 5% Mo, 1% V, 20% Hf, and the rest are unavoidable impurity elements.

[0037] The preparation method of the novel refractory high-entropy Al-Nb-Zr-Mo-V-Hf alloy of the present embodiment is:

[0038] (1) Prepare raw materials: Weigh the required alloy raw materials according to the proportion of the new refractory high-entropy Al-Nb-Zr-Mo-V-Hf alloy. The specific alloy composition is: 15 at.% Al, 39% Zr, 20% Nb, 5% Mo, 1% V, 20% Hf;

[0039] (2) Arc melting: Under the protection of protective gas, Al, Zr, Nb, Mo, V, Zr-Hf intermediate alloys were heated and melted rapidly; in order to obtain alloy ingots with uniform composition, all samples were smelted five times repeatedly, each The samples were turned over after all smelting. In order to avoid possible effects on the microstructure and performance of the sample...

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Abstract

The invention discloses structure and function integrated high-entropy alloy based on an Al-Nb-Zr-Mo-V-Hf system, and belongs to the field of high-entropy alloy materials. The structure and function integrated high-entropy alloy comprises the components of, by mass, 4-15% of aluminum, 20-30% of niobium, 20-60% of zirconium, 5-15% of molybdenum, 1-5% of vanadium and the balance 0.01-20.0% of hafnium and inevitable impurities. Aiming at the problems that at present, typical high-entropy alloy which is of a BCC structure and difficult to melt, such as TaNbMoW, TaNbMoWV and other elements comprising a lot of high-density metal is high in density, high in cost, poor in plasticity at the room temperature and cannot serve as a structure material for application, meanwhile, full attention is givento study on high-entropy alloy having neutron absorptivity, according to the high-entropy alloy based on the Al-Nb-Zr-Mo-V-Hf system provided by the invention, the special effect of the Hf element issufficiently considered, and accordingly, structure and function integration of the high-entropy alloy is achieved.

Description

technical field [0001] The invention belongs to the field of high-entropy alloy materials, and in particular relates to a novel high-entropy alloy with integrated structure and function and a preparation method thereof. Background technique [0002] Radiation resistance is one of the key properties of reactor cladding materials, and it is also a difficult point in current research. Through ion irradiation research outside the stack, it is found that the radiation resistance of high-entropy alloys may be better than that of existing cladding materials. The kinetically slow diffusion effect of the above-mentioned high-entropy alloys may be the reason for their excellent Primary mechanism of irradiance performance. Xia et al. studied the radiation damage of AlCoCrFeNi high-entropy alloys under gold ion irradiation. It was found that its microstructure remains stable even under the action of irradiation dose up to 50 dpa. The study also compared the radiation resistance of hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C16/00C22C1/03
CPCC22C1/03C22C16/00C22C30/00
Inventor 潘虎成滕常青吴璐邓志勇张伟毛建军覃检涛伍晓勇
Owner NORTHEASTERN UNIV
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