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High-entropy alloy, preparation method of high-entropy alloy and compression performance testing method

A high-entropy alloy and high-energy ball milling technology, applied in the field of high-entropy alloys, can solve problems such as failure to meet requirements, and achieve the effects of solving plasticity and strength, high plasticity, and reducing reaction activation energy

Active Publication Date: 2020-03-27
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mechanical properties of high-entropy alloys can be improved to a certain extent through the above methods, they have not yet met the requirements for practical applications.

Method used

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  • High-entropy alloy, preparation method of high-entropy alloy and compression performance testing method
  • High-entropy alloy, preparation method of high-entropy alloy and compression performance testing method
  • High-entropy alloy, preparation method of high-entropy alloy and compression performance testing method

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Experimental program
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Effect test

Embodiment 1

[0113] The invention provides a high-entropy alloy, the high-entropy alloy is CoCr(FeNi) 1.5 W 0.5 , the content of each component in molar percentage is:

[0114]

[0115] The CoCr(FeNi) that present embodiment provides 1.5 W 0.5 The preparation method of alloy comprises the steps:

[0116] (1) In a glove box where argon exists, weigh 18.2% Co powder, 18.2% Cr powder, 27.25% Fe powder, 27.25% Ni powder and 9.1% W powder by mole percentage and mix them , continue to use SPEX8000D high-energy ball milling at 1300rpm in argon for 9 hours to obtain the product after ball milling, in which the particle size of Co powder is 1.2mm, the particle size of Cr powder is 1.2mm, the particle size of Fe powder is 1.2mm, and the particle size of Fe powder is 1.2mm. diameter is 1.2mm, the particle diameter of W powder is 1.2mm, the particle diameter of Hf powder is 1.2mm, and the purity of Co, Cr, Fe, Ni and W metal powder is all 99.9%, and the ball milling beads of described high-ener...

Embodiment 2

[0124] This embodiment provides a kind of high entropy alloy, and described high entropy alloy is CoCr(FeNi) 1.5 f 0.3 , the preparation method is to replace the molar percentage ratio of the metal raw material with CoCr(FeNi) 1.5 f 0.3 Except the content proportioning, all the other are identical with embodiment 1, and its compressibility test method is identical with embodiment 1.

Embodiment 3

[0126]This embodiment provides a kind of high entropy alloy, and described high entropy alloy is CoCr(FeNi) 1.5 f 0.3 W 0.5 , the preparation method is to replace the molar percentage ratio of the metal raw material with CoCr(FeNi) 1.5 f 0.3 W 0.5 Except the content proportioning, all the other are identical with embodiment 1, and its compressibility test method is identical with embodiment 1.

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Abstract

The invention provides a high-entropy alloy. The high-entropy alloy includes certain contents of Co, Cr, Fe and Ni and W and / or Hf, wherein the W and / or Hf can strengthen mechanical properties of thehigh entropy alloy, so that the high entropy alloy has good plasticity and high strength at the same time. The invention also provides a preparation method of the high-entropy alloy. By means of the method, the certain contents of Co, Cr, Fe and Ni and the W and / or Hf are mixed to be subjected to ball milling, discharge plasma sintering is carried out after ball milling, the high-entropy alloy with the uniform organization structure and good mechanical properties can be prepared, the method is simple in process and short production in process and has the good promotion value.

Description

technical field [0001] The invention relates to the technical field of high-entropy alloys, in particular to a high-entropy alloy, a preparation method thereof, and a compression performance testing method. Background technique [0002] Different from traditional alloy materials, high-entropy alloys (HEAs) have multiple components. Because of their uniform structure and unique comprehensive properties, they have attracted widespread attention from scholars since their discovery in 2004. For alloy materials, there are three main crystal structures formed by the arrangement of atoms: face-centered cubic (FCC), body-centered cubic (BCC) and hexagonal close-packed (HCP). [0003] At present, there are few high-entropy alloys with HCP structure type, and the research focus is mainly on HEAs with FCC and BCC structures. However, in the research process, the balance of plasticity and strength is a very important issue, which greatly limits the application of HEAs. HEAs with FCC s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/04G01N3/08G01N1/28
CPCC22C1/04C22C30/00G01N1/28G01N3/08
Inventor 任富增黄志坤朱明余成卓
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA