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High-plasticity and high-strength hexabasic refractory high-entropy alloy and verification method thereof

A technology of high-entropy alloys and verification methods, applied in the field of metal materials, can solve the problems of poor plasticity of high-entropy alloys, difficulty in predicting the properties of refractory high-entropy alloys in advance, and lack of clear design guidance, etc., to shorten the production process Time, good room temperature compression plasticity and strength, and the effect of improving the success rate

Inactive Publication Date: 2018-01-23
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • 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.
[0005] Moreover, there is currently no clear design guidance for the design of refractory high-entropy alloys, and most of them are simple equiatomic ratios. The properties of the prepared refractory high-entropy alloys are difficult to predict in advance

Method used

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  • High-plasticity and high-strength hexabasic refractory high-entropy alloy and verification method thereof
  • High-plasticity and high-strength hexabasic refractory high-entropy alloy and verification method thereof
  • High-plasticity and high-strength hexabasic refractory high-entropy alloy and verification method thereof

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Embodiment 1

[0044] A verification method for a high-plasticity and high-strength six-element refractory high-entropy alloy described in this embodiment, the method is as follows:

[0045] A six-element refractory high-entropy alloy with high plasticity and high strength, the component is Zr a Ti b f c V d Nb e x f , where a, b, c, d, e and f are respectively the molar proportions corresponding to each element, taking a=1, b=1, c=1, d=0.5, e=0.5, f=0.2, X is Ta, that is, the high-entropy alloy is ZrTiHfV 0.5 Nb 0.5 Ta 0.2 ;

[0046] The purity of Zr, Ti, Hf, V, Nb and Ta is 99.7wt%.

[0047] (1) ZrTiHfV 0.5 Nb 0.5 Ta 0.2 The atomic size difference parameter δ

[0048]

[0049] where C i is the mole percentage of the i-th component, r i is the atomic radius of the i-th component, N is the total number of alloy components; Zr atomic radius is 0.159nm; Ti atomic radius is 0.146nm; Hf atomic radius is 0.158nm; V atomic radius is 0.132nm; Nb atomic radius is 0.143nm nm; Ta at...

Embodiment 2

[0061] A design method of a high-plasticity high-strength six-element refractory high-entropy alloy described in this embodiment, the method is as follows:

[0062] A six-element refractory high-entropy alloy with high plasticity and high strength, the component is Zr a Ti b f c V d Nb e x f , where a, b, c, d, e and f are respectively the molar proportions corresponding to each element, a=1, b=1, c=1, d=0.5, e=0.5, f=0.5, X is Ta, that is, the high-entropy alloy is ZrTiHfV 0.5 Nb 0.5 Ta 0.5 ;

[0063] The purity of Zr, Ti, Hf, V, Nb and Ta is 99.7wt%.

[0064] (1) ZrTiHfV 0.5 Nb 0.5 Ta 0.5 Atomic size difference parameter δ

[0065]

[0066] where C i is the mole percentage of the i-th component, r i is the atomic radius of the i-th component, N is the total number of alloy components; Zr atomic radius is 0.159nm; Ti atomic radius is 0.146nm; Hf atomic radius is 0.158nm; V atomic radius is 0.132nm; Nb atomic radius is 0.143nm nm; Ta atomic radius is 0.147nm...

Embodiment 3

[0078] A design method of a high-plasticity high-strength six-element refractory high-entropy alloy described in this embodiment, the method is as follows:

[0079] A six-element refractory high-entropy alloy with high plasticity and high strength, the component is Zr a Ti b f c V d Nb e x f , where a, b, c, d, e and f are respectively the molar proportions corresponding to each element, taking a=1, b=1, c=1, d=0.5, e=0.5, f=0.2, X is Mo, that is, the high-entropy alloy is ZrTiHfV 0.5 Nb 0.5 Mo 0.2 ;

[0080] The purity of Zr, Ti, Hf, V, Nb and Mo is 99.7wt%.

[0081] (1) ZrTiHfV 0.5 Nb 0.5 Mo 0.2 The atomic size difference parameter δ

[0082]

[0083] where C i is the mole percentage of the i-th component, r i is the atomic radius of the i-th component, N is the total number of alloy components; Zr atomic radius is 0.159nm; Ti atomic radius is 0.146nm; Hf atomic radius is 0.158nm; V atomic radius is 0.132nm; Nb atomic radius is 0.143nm nm; Mo atomic radius...

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Abstract

The invention relates to high-plasticity and high-strength hexabasic refractory high-entropy alloy and a verification method thereof, and belongs to the field of metal materials. The refractory high-entropy alloy comprises components of ZraTibHfcVdNbeXf, wherein a, b, c, d, e and f are separately molar ratios corresponding to various elements, a equals to 0.2-1, b equals to 0.2-1, c equals to 0.2-1, d equals to 0.2-1, e equals to 0.2-1, f equals to 0.2-1, and X is Ta or Mo; and purities of Zr, Ti, Hf, V, Nb, Ta and Mo are 99.7wt% or above. The refractory high-entropy alloy is excellent in mechanical property, and has high compression plasticity at room temperature and high strength. The verification method of the high-plasticity and high-strength refractory high-entropy alloy is simple andreliable; the success rate of preparation of the refractory high-entropy alloy is increased; and the time for preparation of the high-entropy alloy is shortened.

Description

technical field [0001] The invention relates to a six-element refractory high-entropy alloy with high plasticity and high strength and a design method thereof, belonging to the field of metal materials. Background technique [0002] High-entropy alloy is 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] Compared with traditional alloys, high-entropy alloys have unique and excellent structures and properties. However, the development of high-entropy alloys is still in the initial stage, and the research o...

Claims

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Application Information

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IPC IPC(8): C22C30/00
Inventor 李云凯程博程兴旺
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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