A kind of crystalline beryllium-containing high-entropy alloy material and preparation method thereof

A high-entropy alloy and crystalline technology, applied in the field of high-entropy alloys, can solve the problems of lack of comprehensive mechanical properties of crystalline high-entropy alloy materials, and achieve the effect of changing the microstructure, enhancing other properties, and improving the difference in the atomic size of the alloy.

Active Publication Date: 2019-08-30
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

This solves the technical problem of lack of crystalline high-entropy alloy materials with excellent comprehensive mechanical properties in the prior art

Method used

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  • A kind of crystalline beryllium-containing high-entropy alloy material and preparation method thereof
  • A kind of crystalline beryllium-containing high-entropy alloy material and preparation method thereof
  • A kind of crystalline beryllium-containing high-entropy alloy material and preparation method thereof

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0031] In general, the alloy composition is calculated from the enthalpy of mixing (ΔH mix ) and atomic size difference (δ), the formula is:

[0032]

[0033]

[0034] N: the number of components of the alloy;

[0035] c i : Atomic fraction of the i-th element;

[0036] r i : Atomic radius of the i-th element;

[0037] Alloy average atomic radius;

[0038] The parameters of the ...

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Abstract

The invention belongs to the field of high-entropy alloys, and particularly relates to a crystalline beryllium-containing high-entropy alloy material and a preparation method thereof. According to thealloy material, a beryllium element is added, and thus a CoCrFeNiBe high-entropy alloy with high specific strength is developed; due to the fact that the size of a beryllium atom is small, the difference between the size of the beryllium atom and the size of other component atoms is large, and the size difference of an alloy atom is conveniently improved; in addition, the mixing enthalpies of theberyllium and the other four elements have a small minus value, the delta of the high-entropy alloy can be changed at a large extent, and the delta Hmix of the high-entropy alloy can be changed at asmall degree through the micro adjustment of the content of the beryllium element, so that the organizational structure of the high-entropy alloy is obviously changed, the alloy is prevented from falling in an amorphous alloy region or an intermetallic compound region, and the solid solution phase high-entropy alloy is obtained; and moreover, the beryllium has the performance of being light in weight and high in specific strength, so that the hardness and the lightness of the series of high-entropy alloys are greatly enhanced, the density is reduced, and the specific strength degree of the alloy is increased.

Description

technical field [0001] The invention belongs to the field of high-entropy alloys, and more specifically relates to a crystalline beryllium-containing high-entropy alloy material and a preparation method thereof. Background technique [0002] Traditional alloys adopt the design concept of one or two elements as the main elements to obtain single principal element or double principal element alloys. High-entropy alloys break through this design concept and are composed of five or more elements that are close to equiatomic ratios. Therefore, high-entropy alloys have high mixing entropy, large lattice distortion, and slow diffusion effects. At the same time, due to The cocktail effect of high-entropy alloys can change the ratio of alloying elements according to the properties that need to be adjusted. [0003] The typical high-entropy alloy series reported so far include high-entropy alloys such as CoCrFeNi, CoCrFeNiAl, and MoNbTaW; there are also high-entropy amorphous alloys ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02
Inventor 龚攀王新云李方伟王颖
Owner HUAZHONG UNIV OF SCI & TECH
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