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A radiation-resistant high-entropy alloy

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, easy access, and scientific formula

Active Publication Date: 2021-02-19
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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  • A radiation-resistant high-entropy alloy

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, and the elements of Ti, Zr, Hf, V, Mo, Nb and Ta are all selected with a purity of More than 99.5wt% industrial-grade pure raw materials. Then vacuum arc melting or vacuum electromagnetic levitation induction melting is adopted. When melting the alloy, the Ti, Zr, V and Ta are placed at the bottom, and the Nb, Mo and Hf are placed at the top, and the vacuum is evacuated to 5×10 -3 Pa, then backflush argon to 0.05MPa. Each alloy ingot is melted at least five times during arc melting to ensure uniform composition.

[0030] figure 1 The relationship between the average nano-indentation hardness and the indentation depth before a...

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 this embodiment TiZrHfVMoNb 0.2 Ta 0.2 With embodiment 1TiZrHfVMoNb 0.1 Ta 0.1 It also has excellent mechanical properties and radiation resistance, and can be widely used as fuel cladding materials in nuclear power plant reactors or key metal parts of nuclear power plants.

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

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Abstract

The invention provides a radiation-resistant high-entropy alloy. The general formula of the radiation-resistant high-entropy alloy is TiZrHfVMoTa x Nb y , where 0.05≤x≤0.25, 0.05≤y≤0.5, x and y are molar ratios. The preparation method of the radiation-resistant high-entropy alloy comprises the following steps: mixing Ti, Zr, Hf, V, Mo, Ta and Nb in sequence, and then adopting vacuum electromagnetic levitation induction melting or vacuum arc melting to obtain the radiation-resistant high-entropy alloy . The high-entropy alloy of the present invention has excellent radiation resistance, simulated irradiation of helium ions does not produce radiation hardening damage, and the size of helium bubbles is comparable to that of traditional alloys, and the density of bubbles is much lower than that of traditional alloys, and the crystal lattice after irradiation The constant is abnormally reduced, far exceeding the radiation resistance of traditional alloys, and has good strength and plasticity. The compressive yield strength in the as-cast state is as high as 1.1Gpa, and the compressibility elongation exceeds 50%.

Description

technical field [0001] The invention relates to alloy technology, in particular to a radiation-resistant high-entropy alloy. Background technique [0002] Structural materials used in nuclear power plants are usually required to have good comprehensive properties, such as excellent mechanical properties and radiation resistance. For fuel cladding materials used in nuclear reactors, their radiation resistance is particularly important. The large dose of neutron irradiation produced by the nuclear reaction will produce vacancies, dislocations and segregation of elements in the material. At the same time, the aggregation of H and He atoms produced by the transmutation reaction will further cause the material to swell, harden, and embrittle. invalidated. At present, the fuel cladding materials and key metal parts used in nuclear power plants will undergo lattice expansion and radiation hardening damage when irradiated, which accelerates the metal failure process. Contents of...

Claims

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Application Information

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Patent Type & Authority Patents(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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