Irradiation-resistant high-entropy alloy and preparation method thereof

A high-entropy alloy and radiation-resistant technology, applied in the field of alloys, can solve problems such as poor radiation performance, and achieve the effects of increasing corrosion resistance, increasing service temperature, and simple preparation methods

Active Publication Date: 2019-04-23
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to propose a radiation-resistant high-entropy alloy to solve the problem of poor radiation performance of the above-mentioned existing traditional alloys.

Method used

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  • Irradiation-resistant high-entropy alloy and preparation method thereof
  • Irradiation-resistant high-entropy alloy and preparation method thereof
  • Irradiation-resistant high-entropy alloy and preparation method thereof

Examples

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Embodiment 1

[0028] This embodiment discloses a Ti-Zf-Hf-V-Mo-Nb-Ta radiation-resistant high-entropy alloy whose general formula is TiZrHfVMoNb 0.1 Ta 0.1 .

[0029] TiZrHfVMoNb 0.1 Ta 0.1 The specific preparation method is as follows: the raw materials Ti, Zr, Hf, V, Mo, Nb and Ta are stacked in order according to the molar ratio shown in the general formula, wherein the elements of Ti, Zr, Hf, V, Mo, Nb and Ta are all selected with a purity of More than 99.5wt% of industrial grade pure raw materials. Then use vacuum arc melting or vacuum electromagnetic suspension induction melting, when melting alloy, the Ti, Zr, V and Ta are placed on the bottom, the Nb, Mo and Hf are placed on the top, and the vacuum is evacuated to 5×10 -3 Pa, then backflush argon to 0.05MPa. During arc melting, each alloy ingot is melted at least five times to ensure uniform composition.

[0030] figure 1 The relationship between the average nanoindentation hardness and indentation depth before and after irra...

Embodiment 2

[0034] This embodiment discloses a radiation-resistant high-entropy alloy whose general formula is TiZrHfVMoNb 0.2 Ta 0.2 . The preparation method of the radiation-resistant high-entropy alloy in this example is the same as that in Example 1.

[0035] After testing the TiZrHfVMoNb in this example 0.2 Ta 0.2 with Example 1TiZrHfVMoNb 0.1 Ta 0.1 It also has excellent mechanical properties and radiation resistance, and can be widely used in fuel cladding materials in nuclear power plant reactors or key metal components in nuclear power plants.

[0036] The present invention is not limited to the description of any one of the radiation-resistant high-entropy alloys in Examples 1-2, wherein the changes of x and y and the changes of the preparation method are all within the protection scope of the present invention.

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Abstract

The invention provides irradiation-resistant high-entropy alloy and a preparation method thereof. The general formula of the irradiation-resistant high-entropy alloy is TiZrHfVMoTaxNby, wherein X is no more than 0.25 and no less than 0.05, y is no more than 0.5 and no less than 0.05, and x and y are molar ratio. The preparation method of the irradiation-resistant high-entropy alloy comprises the following steps: sequentially mixing Ti, Zr, Hf, V, Mo, Ta and Nb, and then adopting vacuum electromagnetic suspension induction smelting or vacuum electric arc melting to obtain the irradiation-resistant high-entropy alloy. The irradiation-resistant high-entropy alloy is excellent in performance; helium ion simulated irradiation does not generate irradiation hardening damage; on the condition thatthe helium bubble size and traditional alloy size is equivalent, the bubble density is far lower than the density of the traditional alloy, and the lattice constant after irradiation is reduced abnormally; the irradiation resistance of the irradiation-resistant high-entropy alloy is far better than that of the traditional alloy; the irradiation-resistant high-entropy alloy has excellent strengthand plasticity; the compression yield strength of the irradiation-resistant high-entropy alloy under the cast condition is as high as 1.1 Gpa, and the compression ratio and elongation exceed 50%.

Description

technical field [0001] The invention relates to alloy technology, in particular to a radiation-resistant high-entropy alloy and a preparation method thereof. Background technique [0002] Structural materials used in nuclear power plants usually require good comprehensive properties, such as excellent mechanical properties and radiation resistance. For the fuel cladding material used in nuclear reactors, its radiation resistance is particularly important. The large dose of neutron irradiation generated by the nuclear reaction will generate vacancies, dislocations and segregation of elements in the material, and the aggregation of H and He atoms generated by the transmutation reaction will further cause the material to swell, harden, and embrittle the material. invalid. At present, the fuel cladding materials and key metal components used in nuclear power plants suffer from lattice expansion and radiation hardening damage during irradiation, which accelerates the metal fail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C30/00G21C3/07
CPCG21C3/07C22C1/02C22C30/00Y02E30/30G21F1/085
Inventor 卢一平张欢枝李廷举王同敏曹志强接金川康慧君张宇博陈宗宁郭恩宇
Owner DALIAN UNIV OF TECH
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