Al-Co-Cr-Ni quaternary high-entropy alloy system and preparation method thereof

An al-co-cr-ni, high-entropy alloy technology, applied in the field of Al-Co-Cr-Ni quaternary high-entropy alloy system and its preparation, can solve the problems of poor plasticity matching of high-entropy alloys, and achieve strong Good plasticity matching, excellent mechanical properties, and the effect of enriching the high-entropy alloy system

Active Publication Date: 2019-11-12
QINGHAI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of Al-Co-Cr-Ni quaternary high-entropy alloy system and its preparation met

Method used

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  • Al-Co-Cr-Ni quaternary high-entropy alloy system and preparation method thereof
  • Al-Co-Cr-Ni quaternary high-entropy alloy system and preparation method thereof
  • Al-Co-Cr-Ni quaternary high-entropy alloy system and preparation method thereof

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Embodiment 1

[0029] An Al-Co-Cr-Ni quaternary high-entropy alloy system, the chemical composition of the high-entropy alloy system is designed according to the atomic ratio: Al a co b Cr c Ni d ; Wherein, a=20, b=24, c=20, d=36, that is, the high-entropy alloy system is expressed as Al 20 co 24 Cr 20 Ni 36 , abbreviated as Ni36.

[0030] In this embodiment, the preparation method of the Al-Co-Cr-Ni quaternary high-entropy alloy system has the following steps:

[0031] 1) Use No. 60 SiC sandpaper to remove impurities and oxides on the surface of the metal elements Al, Co, Cr, and Ni, then use acetone to ultrasonically vibrate and clean twice, dry, and set aside;

[0032] Specifically, acetone is used as a cleaning solution to carry out ultrasonic vibration cleaning to achieve the purpose of cleaning surface impurities; the power density of the ultrasonic vibration cleaning is 0.8W / cm 2 , the frequency is 33Hz, and the purity of the metal elements Al, Co, Cr and Ni is higher than 99....

Embodiment 2

[0038] An Al-Co-Cr-Ni quaternary high-entropy alloy system, the chemical composition of the high-entropy alloy system is designed according to the atomic ratio: Al a cob Cr c Ni d ; Wherein, a=18, b=24, c=20, d=38, that is, the high-entropy alloy system is expressed as Al 18 co 24 Cr 20 Ni 38 , abbreviated as Ni38.

[0039] In this embodiment, the preparation method of the Al-Co-Cr-Ni quaternary high-entropy alloy system has the following steps:

[0040] 1) Use a grinder to remove impurities and oxides on the surface of the metal elements Al, Co, Cr and Ni, then use acetone to ultrasonically vibrate and clean twice, dry, and set aside;

[0041] Specifically, acetone is used as a cleaning solution to carry out ultrasonic vibration cleaning to achieve the purpose of cleaning surface impurities; it can be understood that the parameters of the ultrasonic vibration cleaning are limited and selected according to requirements, and there is no limitation here, as long as the sur...

Embodiment 3

[0046] An Al-Co-Cr-Ni quaternary high-entropy alloy system, the chemical composition of the high-entropy alloy system is designed according to the atomic ratio: Al a co b Cr c Ni d ; Wherein, a=16, b=24, c=20, d=40, that is, the high-entropy alloy system is expressed as Al 16 co 24 Cr 20 Ni 40 , abbreviated as Ni40.

[0047] In this embodiment, the preparation method of the Al-Co-Cr-Ni quaternary high-entropy alloy system has the following steps:

[0048] 1) Use No. 60 SiC sandpaper or a grinder to remove impurities and oxides on the surface of the metal elements Al, Co, Cr and Ni, then use acetone to ultrasonically vibrate and clean twice, dry, and set aside; specifically, by using acetone Ultrasonic vibration cleaning is performed as a cleaning solution to achieve the purpose of cleaning surface impurities; the power density of the ultrasonic vibration cleaning is 0.8W / cm 2 , the frequency is 33Hz, and the purity of the metal elements Al, Co, Cr and Ni is higher than...

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Abstract

The invention relates to a metal material and the technical field of preparation of the metal material, and particularly discloses an Al-Co-Cr-Ni quaternary high-entropy alloy system. Chemical components of the Al-Co-Cr-Ni quaternary high-entropy alloy system are designed into AlaCobCrcNid according to the atomic ratio, wherein 14<=a<=20, b=24, c=20, 36<=d<=42, and a+b+c+d=100. The invention further discloses a preparation method of the high-entropy alloy system. A quaternary eutectic high-entropy alloy Al18Co24Cr20Ni38 taking both strength and plasticity into consideration is provided in theAl-Co-Cr-Ni quaternary high-entropy alloy system so that the high-entropy alloy system can be enriched, and the high-entropy alloy is excellent in mechanical performance, strength and plasticity matching is good, and the problem that an existing high-entropy alloy is poor in strength and plasticity matching is solved; and besides, along with decreasing of an Ni/Al molar ratio, the high-entropy alloy system has hypo eutectic-eutectic-hypereutectic microscopic structure transformation, and a promoting effect is achieved for the problem how to reasonably design an eutectic high-entropy alloy goodin strength and plasticity matching

Description

technical field [0001] The invention relates to the technical field of metal materials and their preparation, in particular to an Al-Co-Cr-Ni quaternary high-entropy alloy system and a preparation method thereof. Background technique [0002] With the development of society and the advancement of science and technology, the types of new alloys are also increasing. Among them, high-entropy alloy (HEA) is defined as a type of alloy containing five or more elements, and the atomic percentage of each element is between 5-35%. Due to the high entropy effect, hysteretic diffusion effect, lattice distortion effect and cocktail effect, etc., it has considerable strength, good plasticity, excellent friction resistance and fatigue resistance, and has also attracted widespread attention. People can adjust the components according to the required properties, expanding the research scope of alloys. [0003] However, a large number of subsequent studies have found that single-phase FCC ...

Claims

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Application Information

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IPC IPC(8): C22C30/00C22C1/02C22B9/20
CPCC22B9/20C22C1/02C22C30/00
Inventor 马丽莉王家宁金培鹏马斌余慧南张宏宏
Owner QINGHAI UNIVERSITY
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