High-plasticity five-element refractory high-entropy alloy and preparation method thereof

A high-entropy alloy and high plasticity technology, applied in the field of metal materials, can solve the problems of high-entropy alloy plasticity is not very good, and achieve the effect of less impurities, convenient operation and stable performance

Inactive Publication Date: 2016-08-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the plasticity of the formed high-entropy alloy is generally not very good.

Method used

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  • High-plasticity five-element refractory high-entropy alloy and preparation method thereof
  • High-plasticity five-element refractory high-entropy alloy and preparation method thereof
  • High-plasticity five-element refractory high-entropy alloy and preparation method thereof

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Embodiment 1

[0032] A five-element refractory high-entropy alloy with high plasticity, the high-entropy alloy is composed of zirconium (Zr), titanium (Ti), hafnium (Hf), vanadium (V) and niobium (Nb) in equimolar amounts, namely ZrTiHfVNb , wherein, the purity of the constituent elements is above 99%, and have the same crystal structure.

[0033] The raw materials are weighed with an electronic balance of 1 / 10,000 to reduce the experimental error. According to the order of melting point from low to high, they are titanium (Ti), zirconium (Zr), vanadium (V), hafnium (Hf), niobium (Nb), Put it into the water-cooled copper crucible of the non-consumable high vacuum arc melting furnace, the element with the lowest melting point titanium (Ti) is placed at the bottom, and the element with the highest melting point niobium (Nb) is placed at the top. Vacuum to 10 -4 MPa, then filled with argon gas to 0.05MPa, arc smelting; repeated smelting 6 times to ensure that the five elements in the raw mate...

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Abstract

The invention relates to high-plasticity five-element refractory high-entropy alloy and a preparation method thereof and belongs to the field of metal materials. The high-entropy alloy is prepared from zirconium, titanium, hafnium, vanadium and niobium, wherein the molar weights of the zirconium, the titanium, the hafnium, the vanadium and the niobium are equal. The preparation method of the high-plasticity five-element refractory high-entropy alloy comprises the steps that the zirconium, the titanium, the hafnium, the vanadium and the niobium are placed in a water-cooling metal crucible in a melting point progressively-decreasing sequence, the element with the lowest melting point is placed at the bottom, and the element with the highest melting point is placed at the top; and arc striking smelting is conducted in an oxygen-free environment till the five elements are fully mixed, and the high-entropy alloy is obtained. The high-entropy alloy is of a single body-centered cubic structure, the yield strength of the high-entropy alloy is higher than 800 MPa, the tensile strength is over 1100 MPa, and the plastic strain is larger than 55%; and the large solid solubility between the elements is obtained, and a simple solid-solution phase is formed. The preparation method has the advantages that the power is high, the performance is table, operation is convenient, the melting point is high, the vacuum degree is high, and the quantity of impurities is small.

Description

technical field [0001] The invention relates to a high-plastic five-element refractory high-entropy alloy and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] High-entropy alloys are a novel alloy design concept first proposed by Taiwan scholar Ye Junwei in the 1990s. Its concept is very different from traditional alloys and greatly enriches the research content of alloy materials. It requires that the alloy contains at least five main elements, and the mole percentage of each alloy element atom is similar, no more than 35%, and the minimum is no less than 5%, that is, no element is used as the dominant element, so it is also acceptable It is called multi-principal element high-entropy alloy. [0003] Since the design concept of high-entropy alloys was put forward, it has attracted widespread attention and active exploration in the scientific community. Scholars' research on high-entropy alloys has shown that because the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C30/00
CPCC22C1/02C22C30/00
Inventor 李云凯程兴旺武艳娇程博
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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