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Double-phase high-entropy alloy and preparation method thereof

A technology of high-entropy alloy and alloy composition, which is applied in the direction of additive manufacturing and additive processing, can solve problems such as poor toughness, and achieve the effects of high forming precision, excellent comprehensive mechanical properties, and low cost

Active Publication Date: 2021-05-04
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The crystal structure of the solid solution in the high-entropy alloy is the main factor controlling the strength, hardness and toughness of the high-entropy alloy. Studies have shown that the HEAs of the face-centered cubic structure (FCC) have lower strength and hardness, but better toughness, while the body-centered cubic structure (BCC) HEAs have high strength and hardness, but poor toughness

Method used

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  • Double-phase high-entropy alloy and preparation method thereof
  • Double-phase high-entropy alloy and preparation method thereof

Examples

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Embodiment 1

[0049]A double phase high entropy alloy comprising a first alloy component of an Fcc phase and a second alloy component of the BCC phase, the first alloy component is FECOCRNI, and the second alloy component is FECOCRNIAL.

[0050]In the first alloy component, the atomic molar ratio of Fe, CO, Cr, Ni is 1: 1: 1: 1; in the second alloy component, Fe, CO, Cr, Ni, Al, atomic molar ratio of 1: 1: 1: 1: 1.

[0051]The weight ratio of the first alloy component to the second alloy component is 1: 1.

[0052]Example 1 The double phase high entropy alloy provided was 826 MPa, the hardness of 400 HV, the toughness was 23%.

Embodiment 2

[0054]A double phase high entropy alloy comprising a first alloy component of an Fcc phase and a second alloy component of the BCC phase, the first alloy component is FECOCRNI, and the second alloy component is FECOCRNIAL.

[0055]In the first alloy component, the atomic molar ratio of Fe, CO, Cr, Ni is 1: 1: 1: 1; in the second alloy component, Fe, CO, Cr, Ni, Al, atomic molar ratio of 1: 1: 1: 1: 1.

[0056]The weight ratio of the first alloy component to the second alloy component is 1: 2.7.

[0057]Example 2 Double-phase high entropy alloy has an intensity of 1510 MPa, a hardness of 863 HV, and a toughness of 2.1%.

Embodiment 3

[0059]A double phase high entropy alloy comprising a first alloy component of an Fcc phase and a second alloy component of the BCC phase, the first alloy component is FECOCRNI, and the second alloy component is FECOCRNIAL.

[0060]In the first alloy component, the atomic molar ratio of Fe, CO, Cr, Ni is 1: 1: 1: 1; in the second alloy component, Fe, CO, Cr, Ni, Al, atomic molar ratio of 1: 1: 1: 1: 1.

[0061]The weight ratio of the first alloy component to the second alloy component is 1: 1.85.

[0062]Example 3 The double phase high entropy alloy provided was 1416 MPa, a hardness of 712 HV, and the toughness was 3%.

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Abstract

The invention provides a double-phase high-entropy alloy. The alloy comprises a first alloy component in an FCC phase and a second alloy component in a BCC phase, wherein the first alloy component is FeCoCrNi, and the second alloy component is FeCoCrNiAl. The double-phase high-entropy alloy contains an FCC structure and a BCC structure in a proper proportion, and is excellent in comprehensive mechanical properties, high in hardness and strength, and good in plasticity and toughness. In addition, the invention further provides a preparation method of the double-phase high-entropy alloy. Through the method, the production period is short, parts in complex shapes can be directly formed, and the formed parts are high in precision and density, and have excellent comprehensive mechanical properties.

Description

Technical field[0001]The present invention relates to the field of metal materials, and more particularly to a dual phase high entropy alloy and a preparation method thereof.Background technique[0002]High-Entropy Alloys, HEAS has a conventional single main element alloy uncomfortable excellent performance, such as high strength, high hardness, anti-high temperature creep, high temperature resistance oxidation, corrosion resistance, and electromagnetic characteristics. The crystal structure of solid solution in high entropy alloy is the main factor in controlling high entropy alloy strength, hardness and toughness. Studies have shown that the HEAs intensity and hardness of the facial cubic structure (FCC), but the toughness is better, and intimate cubic structure (BCC) of Hea intensity and hardness, but poor toughness.[0003]Therefore, how to provide a double-phase high entropy alloy having excellent high intensity and high plasticity, comprehensive mechanical properties, has become a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/04B22F1/00B22F10/28B33Y10/00B33Y70/00
CPCB22F1/0003C22C30/00C22C1/04B33Y10/00B33Y70/00Y02P10/25
Inventor 彭英博张伟刘咏
Owner CENT SOUTH UNIV
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