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A method of electric pulse treatment to enhance the hardness of high-entropy alloys

A high-entropy alloy and electric pulse technology, which is applied in the field of electric pulse treatment to enhance the hardness of high-entropy alloys, and electric pulse treatment to enhance the hardness of Al0.1CoCrFeNi high-entropy alloys, can solve the problems of long heat treatment production cycle, low energy utilization rate, high production cost, etc. problem, achieve the effect of shortening the recrystallization time, increasing the hardness, and enhancing the hardness

Active Publication Date: 2022-05-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, like other FCC high-entropy alloys, Al 0.1 The disadvantage of CoCrFeNi high-entropy alloy is its low hardness, which affects its application in practical scenarios
[0007] In order to solve the problems of long production cycle, high production cost and low energy utilization rate of traditional heat treatment, electric pulse treatment of Al 0.1 CoCrFeNi high-entropy alloy and the method for enhancing its hardness have not been reported yet.

Method used

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  • A method of electric pulse treatment to enhance the hardness of high-entropy alloys
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  • A method of electric pulse treatment to enhance the hardness of high-entropy alloys

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Effect test

Embodiment 1

[0040] Using the same alloy sample as Comparative Example 1, apply electric pulse treatment to it; the parameters of electric pulse treatment are as follows: the form of electric pulse output during electric pulse treatment is a pulse square wave, and the number of times of electric pulse treatment is 10 times, a single The time of electric pulse treatment is 0.5s, the time interval between two adjacent electric pulse treatments is 30s, and the current density of each electric pulse treatment is 10A / mm 2 , after electric pulse treatment, Al 0.1 The CoCrFeNi high-entropy alloy sample was naturally cooled to obtain Al after electric pulse treatment 0.1 CoCrFeNi high entropy alloy.

[0041] Al after the electric pulse treatment that this embodiment obtains 0.1 The CoCrFeNi high-entropy alloy was tested as follows:

[0042] (1) Al after the electric pulse treatment that present embodiment obtains with X-ray diffractometer 0.1 CoCrFeNi high-entropy alloy was tested by X-ray dif...

Embodiment 2

[0045] Using the same alloy sample as Comparative Example 1, apply electric pulse treatment to it; the parameters of electric pulse treatment are as follows: the form of electric pulse output during electric pulse treatment is a pulse square wave, and the number of times of electric pulse treatment is 10 times, a single The time of electric pulse treatment is 0.5s, the time interval between two adjacent electric pulse treatments is 30s, and the current density of each electric pulse treatment is 90A / mm 2 , after electric pulse treatment, Al 0.1 The CoCrFeNi high-entropy alloy sample was naturally cooled to obtain Al after electric pulse treatment 0.1 CoCrFeNi high entropy alloy.

[0046] Al after the electric pulse treatment that this embodiment obtains 0.1 The CoCrFeNi high-entropy alloy was tested as follows:

[0047] (1) Al after the electric pulse treatment that present embodiment obtains with X-ray diffractometer 0.1 CoCrFeNi high-entropy alloy was tested by X-ray dif...

Embodiment 3

[0050] Using the same alloy sample as Comparative Example 1, apply electric pulse treatment to it; the parameters of electric pulse treatment are as follows: the form of electric pulse output during electric pulse treatment is a pulse square wave, and the number of times of electric pulse treatment is 10 times, a single The time of electric pulse treatment is 0.5s, the time interval between two adjacent electric pulse treatments is 30s, and the current density of each electric pulse treatment is 100A / mm 2 , after electric pulse treatment, Al 0.1 The CoCrFeNi high-entropy alloy sample was naturally cooled to obtain Al after electric pulse treatment 0.1 CoCrFeNi high entropy alloy.

[0051] Al after the electric pulse treatment that this embodiment obtains 0.1 The CoCrFeNi high-entropy alloy was tested as follows:

[0052] (1) Al after the electric pulse treatment that present embodiment obtains with X-ray diffractometer 0.1 CoCrFeNi high-entropy alloy was tested by X-ray di...

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Abstract

The invention relates to a method for enhancing the hardness of a high-entropy alloy by electric pulse treatment, and belongs to the technical field of strengthening and toughening treatment of alloy materials. The method is as follows: the Al 0.1 CoCrFeNi high-entropy alloy is subjected to electric pulse treatment, the number of electric pulse treatment is 5 to 20 times, the time of single electric pulse treatment is 0.1s to 1s, and the time interval between two adjacent electric pulse treatments is 10s to 60s. The current density of the pulse treatment is 10A / mm 2 ~100A / mm 2 , and the current density of each electric pulse treatment is the same, after the electric pulse treatment, the processed Al 0.1 Natural cooling of CoCrFeNi high-entropy alloy to obtain Al after electric pulse treatment 0.1 CoCrFeNi high entropy alloy. The method has the characteristics of short time, high efficiency and green, and can enhance Al 0.1 Hardness of CoCrFeNi high-entropy alloys.

Description

technical field [0001] The invention relates to a method for enhancing the hardness of high-entropy alloys by electric pulse treatment, in particular to a method for enhancing the hardness of high-entropy alloys by electric pulse treatment. 0.1 The invention discloses a method for the hardness of a CoCrFeNi high-entropy alloy, which belongs to the technical field of strengthening and toughening treatment of alloy materials. Background technique [0002] In recent years, under the guidance of multi-component alloy design ideas, researchers have discovered a new type of metal material with both "structural disorder" and "chemical disorder" by changing and modulating the "configuration entropy" of the alloy system - high entropy alloy. Thermodynamically, high-entropy alloys have lower Gibbs free energy and thus exhibit higher phase and microstructure stability. Due to the lattice distortion effect of the structure, the kinetics of high-entropy alloys shows the characteristics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F3/00
CPCC22F3/00
Inventor 武伟超王亚飞夏柳郝忠虎王强潘艾刚蔡欢喜
Owner BEIJING INSTITUTE OF TECHNOLOGYGY