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Irradiation-resisting FCC structure high-entropy alloy and preparing method thereof

A high-entropy alloy and radiation-resistant technology, applied in the field of alloys, can solve problems such as poor mechanical properties of irradiation, and achieve the effects of improving high-temperature performance, improving corrosion resistance, and excellent mechanical and radiation resistance properties.

Active Publication Date: 2019-06-21
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor radiation mechanical properties of traditional alloys, and propose a high-entropy alloy with a radiation-resistant FCC structure.

Method used

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  • Irradiation-resisting FCC structure high-entropy alloy and preparing method thereof
  • Irradiation-resisting FCC structure high-entropy alloy and preparing method thereof
  • Irradiation-resisting FCC structure high-entropy alloy and preparing method thereof

Examples

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Embodiment 1

[0026] This embodiment discloses a Fe-Co-Ni-V-Mo-Ti-Cr radiation-resistant FCC structure high-entropy alloy, whose general formula is FeCoNiVMoTi 0.1 Cr 0.1 .

[0027] FeCoNiVMoTi 0.1 Cr 0.1 The specific preparation method is as follows: the raw materials Fe, Co, Ni, V, Mo, Ti and Cr are stacked according to the molar ratio shown in the general formula, and the elements of Fe, Co, Ni, V, Mo, Ti and Cr are all selected with a purity of 99.5wt % more than industrial grade pure raw materials. Then vacuum arc melting or vacuum magnetic levitation melting is adopted. When melting the alloy, the Ti, Fe, Co and Ni are placed at the bottom, and the Mo, Cr and V 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.

[0028] figure 1 It is the relationship between the average nano-indentation hardness and the indentation depth before and af...

Embodiment 2

[0032] This embodiment discloses a high-entropy alloy with a radiation-resistant FCC structure, whose general formula is FeCoNiVMoTi 0.15 Cr 0.15 . The preparation method of the radiation-resistant high-entropy alloy in this example is the same as that in Example 1.

[0033] After testing this embodiment FeCoNiVMoTi 0.15Cr 0.15 and Example 1 FeCoNiVMoTi 0.1 Cr 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.

[0034] 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 an irradiation-resisting FCC structure high-entropy alloy. The general formula of the irradiation-resisting FCC structure high-entropy alloy is FeCoNiVMoTixCry, wherein x is larger than or equal to 0.05 and smaller than or equal to 0.2, y is larger than or equal to 0.05 and smaller than or equal to 0.3, and x and y are molar ratios. The irradiation-resisting FCC structure high-entropy alloy is excellent in irradiation resisting performance, the phenomenon of irradiation hardening saturation can happen under the irradiation conditions that the temperature is high and is600 DEG C, and the dose of helium ions is high and is 1-3 x 10<16>ions / cm<2>, the lattice constant after irradiation is abnormally reduced, the irradiation resisting performance of traditional alloysis far exceeded, and meanwhile excellent plasticity and certain strength are achieved; and at the cast-state room temperature, the tensile failure strength of the irradiation-resisting FCC structure high-entropy alloy exceeds 580 Mpa, and the engineering strain (stretching ductility ) exceeds 30%.

Description

technical field [0001] The invention relates to alloy technology, in particular to a radiation-resistant FCC structure high-entropy alloy and a preparation method thereof. Background technique [0002] Metal materials commonly used in nuclear reactors include traditional alloys such as zirconium-based alloys, stainless steel, titanium alloys, and nickel-based alloys. None of these metal materials can meet the radiation resistance performance requirements of key metal components in next-generation nuclear reactors. The working environment in the next-generation nuclear reactor is very harsh. The structural materials, especially the cladding materials of the nuclear reactor, have to withstand high temperature, high pressure, and intense neutron irradiation, which will cause defects such as vacancies, dislocations, and segregation of elements in the materials. , the simultaneous transmutation reaction produces H and He atom aggregation. A large number of defects produced by th...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02
CPCC22C30/00G21C3/07Y02E30/30C22C38/52C22C38/46C22C38/44C22C38/50C22C33/04G21F1/125C22C1/02G21F1/08
Inventor 王同敏卢一平李廷举曹志强张欢枝接金川康慧君张宇博陈宗宁郭恩宇
Owner DALIAN UNIV OF TECH
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