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Light high-specific-strength high-entropy alloy material and preparation method thereof

A technology of high-entropy alloys and high specific strength, applied in the field of alloy materials, can solve the problems of limited application range and high density of high-entropy alloys, achieve high service temperature, low-cost price advantages, and facilitate large-scale industrial production

Active Publication Date: 2021-04-30
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a light-weight high-specific-strength high-entropy alloy material and its preparation method to solve the problems of high-entropy alloy density and limited application range in the prior art

Method used

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  • Light high-specific-strength high-entropy alloy material and preparation method thereof
  • Light high-specific-strength high-entropy alloy material and preparation method thereof
  • Light high-specific-strength high-entropy alloy material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] Example 1: Preparation of light-weight and high-specific-strength high-entropy alloy Al 20 Li 20 Mg 10 Ti 40 Zn 10 high entropy alloy high entropy alloy material

[0034] (1) Al:Li=2:1 (at.%) aluminum-lithium alloy powder, Mg:Li=1:1 (at.%) magnesium-lithium alloy powder and 325 mesh Ti and Zn alloy powder are used Prepare Al according to atomic percentage in vacuum glove box 20 Li 20 Mg 10 Ti 40 Zn 10 Element.

[0035] (2) Pour the weighed alloying element powder into the stainless steel ball mill tank matched with the ball mill and mix evenly. In order to prevent the alloy powder from agglomerating and agglomerating or sticking to the wall of the ball milling tank during the mechanical alloying process, resulting in low powder yield and even insufficient alloying process, 3 wt.% stearic acid ( C 18 h 36 o 2 ) as a process control agent. The ball milling medium adopts stainless steel balls, and the ball-to-material ratio is 10:1.

[0036] (3) Put the bal...

Embodiment 2

[0041] Embodiment 2: Preparation of high-entropy alloy Al with light weight and high specific strength 20 Li 20 Mg 10 Ti3 0 Zr 20 high entropy alloy high entropy alloy material

[0042] (1) Use Al:Li = 2:1 (at.%) aluminum-lithium master alloy powder, Mg:Li = 1:1 (at.%) magnesium-lithium master alloy powder and 325 mesh Ti and Zr alloy powder Prepare Al according to atomic percentage in vacuum glove box 20 Li 20 Mg 10 Ti3 0 Zr 20 .

[0043] (2) Pour the weighed alloying element powder into the stainless steel ball mill tank matched with the ball mill and mix evenly. In order to prevent the alloy powder from agglomerating and agglomerating or sticking to the wall of the ball milling tank during the mechanical alloying process, resulting in low powder yield and even insufficient alloying process, 3 wt.% stearic acid ( C 18 h 36 o 2 ) as a process control agent. The ball milling medium adopts stainless steel balls, and the ball-to-material ratio is 10:1.

[0044] (...

Embodiment 3

[0049] Example 3: Preparation of light-weight, high-specific-strength high-entropy alloy Al 20 Li 20 Mg 10 Ti 30 V 20 high entropy alloy high entropy alloy material

[0050] (1) Use Al:Li=2:1 (at.%) aluminum-lithium alloy powder, Mg:Li=1:1 (at.%) magnesium-lithium alloy powder and 325 mesh Ti and Zr alloy powder Prepare Al according to atomic percentage in vacuum glove box 20 Li 20 Mg 10 Ti 30 V 20 .

[0051] (2) Pour the weighed alloying element powder into the stainless steel ball mill tank matched with the ball mill and mix evenly. In order to prevent the alloy powder from agglomerating and agglomerating or sticking to the wall of the ball milling tank during the mechanical alloying process, resulting in low powder yield and even insufficient alloying process, 3 wt.% stearic acid ( C 18 h 36 o 2 ) as a process control agent. The ball milling medium adopts stainless steel balls, and the ball-to-material ratio is 10:1.

[0052] (3) Put the ball milling medium,...

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Abstract

The invention discloses a light high-specific-strength high-entropy alloy material. The high-entropy alloy material is an AlLiMgTiM(M=Zn, V, Zr) high-entropy alloy; and according to the atomic percent, the Al element ranges from 10% to 20%, the Li element ranges from 10% to 20%, the Mg element ranges from 10% to 20%, the Ti element ranges from 30% to 40% and the M element ranges from 10% to 20%. On the basis of the low-density elements Al, Li, Mg and Ti, M(M=Zn, V, Zr) is added to design the high-entropy alloy, so that the obtained alloy has a more excellent structure, the AlLiMgTiZn alloy has a HCP phase structure and an unknown phase structure, the AlLiMgTiZr alloy has a double-phase solid solution structure composed of HCP1 and HCP2, AlLiMgTiV has a single-phase BCC solid solution structure, and by means of the excellent structures, the obtained alloy is low in density, high in specific strength and much higher than the performance of a Ti-6Al-4V alloy in the prior art. The preparation method adopts a mode of combining mechanical alloying and cold pressing sintering, is simple, convenient and feasible, and is suitable for application of industrial production.

Description

technical field [0001] The invention relates to the technical field of alloy materials, in particular to a high-entropy alloy material with light weight and high specific strength and a preparation method thereof. Background technique [0002] Different from traditional alloys, high-entropy alloys are composed of multiple components in equimolar ratio or near equimolar ratio. The existing high-entropy alloy materials have shown excellent properties, such as high strength, high hardness, high wear resistance and corrosion resistance, etc., and have great development and use value. However, most of the design of high-entropy alloy materials is concentrated on high-entropy alloys composed of high-density transition metal elements (such as Fe, Co, Cr, Ti, Cu, Ni, V, Mn, etc.). Although the formed high-entropy alloy materials have excellent mechanical properties, these alloy materials have a large specificity and are not suitable for applications in the fields of aircraft, autom...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C30/06C22C1/04B22F9/04B22F3/16
CPCB22F3/16B22F9/04B22F2009/043C22C1/04C22C30/00C22C30/06
Inventor 张静董权李萌刘雪健董晓宇杨成博
Owner CHONGQING UNIV
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