Low-density high-entropy alloy material oriented for high temperature applications and preparation method of low-density high-entropy alloy material

A high-entropy alloy and low-density technology, applied in the field of high-entropy alloys, can solve the problems of high-entropy alloys with high density and poor plasticity

Inactive Publication Date: 2018-09-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of high density and poor plasticity of high-temperature high-entropy alloys, and provide a low-density high-entropy alloy material for high-temperature applications and its preparation method

Method used

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  • Low-density high-entropy alloy material oriented for high temperature applications and preparation method of low-density high-entropy alloy material
  • Low-density high-entropy alloy material oriented for high temperature applications and preparation method of low-density high-entropy alloy material
  • Low-density high-entropy alloy material oriented for high temperature applications and preparation method of low-density high-entropy alloy material

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Embodiment 1

[0023] This embodiment is a Ti 35 al 15 Nb 20 V 20 Mo 10 It is a high-entropy alloy, composed of five elements such as Ti, Al, V, Nb, Mo, etc. The relative atomic percentage content of Ti is 35%, the relative atomic percentage of Al is 15%, the relative atomic percentage of V is 20%, and the relative atomic percentage of Nb The relative atomic percentage of Mo is 20%, and the relative atomic percentage of Mo is about 10%. Ti 35 al 15 Nb 20 V 20 Mo 10 For single-phase BCC structure, such as figure 1 shown.

[0024] The purity of the Ti, Al, V, Nb, Mo and other metal raw materials is higher than 99.99wt%;

[0025] The Ti 35 al 15 Nb 20 V 20 Mo 10 The preparation method of high entropy alloy is:

[0026] Step 1: Select five metal elements such as Ti, Al, V, Nb, Mo, etc., remove the surface oxide skin with a small grinding wheel, and use an ultrasonic cleaner to clean the metal raw material. According to Ti 35 al 15 Nb 20 V 20 Mo 10 The atomic percentage of ...

Embodiment 2

[0032] This embodiment is a Ti 40 al 10 Nb 20 V 20 Mo 10 It is a high-entropy alloy, composed of five elements such as Ti, Al, V, Nb, and Mo. The relative atomic percentage of Ti is 40%, the relative atomic percentage of Al is 10%, the relative atomic percentage of V is 20%, and the relative atomic percentage of Nb is 40%. The relative atomic percentage of Mo is 20%, and the relative atomic percentage of Mo is about 10%. Ti 40 al 10 Nb 20 V 20 Mo 10 For single-phase BCC structure, such as figure 1 shown.

[0033] The purity of the Ti, Al, V, Nb, Mo and other metal raw materials is higher than 99.99wt%;

[0034] The Ti 40 al 10 Nb 20 V 20 Mo 10 The preparation method of high entropy alloy is:

[0035] Step 1: Select five metal elements such as Ti, Al, V, Nb, Mo, etc., remove the surface oxide skin with a small grinding wheel, and use an ultrasonic cleaner to clean the metal raw material. According to Ti 40 al 10 Nb 20 V 20 Mo 10 The atomic percentage of h...

Embodiment 3

[0040] This embodiment is a Ti 30 al 20 Nb 20 V 20 Mo 10 It is a high-entropy alloy, composed of five elements such as Ti, Al, V, Nb, Mo, etc. The relative atomic percentage content of Ti is 30%, the relative atomic percentage of Al is 20%, the relative atomic percentage of V is 20%, Nb The relative atomic percentage of Mo is 20%, and the relative atomic percentage of Mo is about 10%. Ti 30 al 20 Nb 20 V 20 Mo 10 For single-phase BCC structure, such as figure 1 shown.

[0041] The purity of the Ti, Al, V, Nb, Mo and other metal raw materials is higher than 99.99wt%;

[0042] The Ti 30 al 20 Nb 20 V 20 Mo 10 The preparation method of high entropy alloy is:

[0043] Step 1: Select five metal elements such as Ti, Al, V, Nb, Mo, etc., remove the surface oxide skin with a small grinding wheel, and use an ultrasonic cleaner to clean the metal raw material. According to Ti 30 al 20 Nb 20 V 20 Mo 10 The atomic percentage of high-entropy alloys accurately weighs ...

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Abstract

The invention relates to a low-density high-entropy alloy material oriented for high temperature applications and a preparation method of the low-density high-entropy alloy material, in particular toa TiAlNbVMo-system low-density high-entropy alloy material and a preparation method thereof, and belongs to the field of high-entropy alloys. In order to possessing characteristics of both low densityand high strength, the novel alloy consists of Ti, Al, V, Nb and Mo, and a mother alloy button ingot is obtained through electric arc melting. The alloy is of a single phase BCC (body-centered cubic)structure; the novel alloy is high both in strength and tenacity, has very well mechanical property, can exceed 1000MPa in as-cast compressive yield strength, and cannot crack in a compression process; meanwhile, the density of the alloy is from 5.5 g / cm<3> to 6.1 g / cm<3>, and is relatively low; and the novel alloy is high in specific strength, still relatively high in strength at high temperature, and can exceed 700MPa at 800 DEG C and exceed 200MPa at 1000 DEG C in compressive yield strength.

Description

technical field [0001] The invention relates to a low-density high-entropy alloy material for high-temperature applications and a preparation method thereof, in particular to a TiAlNbVMo-based low-density high-entropy alloy material and a preparation method thereof, belonging to the field of high-entropy alloys. Background technique [0002] High-entropy alloys are a new type of alloy design concept proposed in the past ten years. Compared with traditional alloys with only one or two principal elements, high-entropy alloys have multiple principal elements and form a single solid solution phase. This feature makes high-entropy alloys have structural lattice distortion effects, thermodynamic high-entropy effects, kinetic hysteretic diffusion effects, and performance cocktail effects. These effects make high-entropy alloys have great application potential in aerospace, defense, biology and other fields. Therefore, high-entropy alloys have become a major research hotspot in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02
Inventor 程兴旺徐子祁王梦陈义文谭友德
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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