Multi-pivot-element high-entropy alloy and preparation method thereof

A high-entropy alloy, multi-principal technology, applied in the field of materials, can solve the problems of low strength and poor plasticity, and achieve the effects of low cost, good plasticity and excellent mechanical properties

Inactive Publication Date: 2017-08-11
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the reported research, it is found that the high-entropy alloy system with high plasticity has low strength, and the high-entropy alloy system with relatively high strength has poor plasticity.

Method used

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  • Multi-pivot-element high-entropy alloy and preparation method thereof
  • Multi-pivot-element high-entropy alloy and preparation method thereof
  • Multi-pivot-element high-entropy alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The composition of the multi-principal high-entropy alloy is FeCoNiAlCu, that is, a=1.0, b=1.0, c=1.0, d=1.0, e=1, and the specific steps are as follows:

[0043] Step 1: Put the alloy raw material in a beaker, pour low-solubility hydrochloric acid solution, remove the oxide layer on the surface, after the oxide layer is completely removed, put the raw material into a beaker filled with ethanol and place the beaker in an ultrasonic Wash in the washing machine for 10 minutes, then replace the ethanol and wash for 5 minutes, and finally dry the raw materials with a hair dryer for smelting.

[0044] Step 2: According to the molar ratio of the multi-principal high-entropy alloy, accurately weigh Fe, Co, Ni, Al and Cu raw materials with an electronic balance and mix them.

[0045] Step 3: First remove foreign matter in the furnace, and clean the copper crucible and its inner wall in the melting furnace with absolute ethanol, then turn on the circulating cooling water system,...

Embodiment 2

[0051] The composition of the multi-principal high-entropy alloy is FeCoNiAlCu 1.5 , namely a=1.0, b=1.0, c=1.0, d=1.0, e=1.5, the specific steps are as follows:

[0052] Step 1: Put the alloy raw material in a beaker, pour low-solubility hydrochloric acid solution, remove the oxide layer on the surface, after the oxide layer is completely removed, put the raw material into a beaker filled with ethanol and place the beaker in an ultrasonic Wash in the washing machine for 10 minutes, then replace the ethanol and wash for 5 minutes, and finally dry the raw materials with a hair dryer for smelting.

[0053] Step 2: According to the molar ratio of the multi-principal high-entropy alloy, accurately weigh Fe, Co, Ni, Al and Cu raw materials with an electronic balance and mix them.

[0054] Step 3: First remove foreign matter in the furnace, and clean the copper crucible and its inner wall in the melting furnace with absolute ethanol, then turn on the circulating cooling water syste...

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Abstract

The invention provides a multi-principal high-entropy alloy and a preparation method thereof, wherein the composition of the multi-principal high-entropy alloy is Fe a co b Ni c Al d Cu e , where a, b, c, d and e represent the molar ratios of each element respectively, and 0.9≤a≤1.1, 0.9≤b≤1.1, 0.9≤c≤1.1, 0.9≤d≤1.1, 0.9≤e≤ 2.0. The multi-principal element high-entropy alloy has good plasticity, can obtain higher strength at the same time, and has excellent mechanical properties.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a multi-principal element high-entropy alloy and a preparation method thereof. Background technique [0002] In 1995, Taiwan scholar Ye Junwei’s research group broke through the traditional alloy design concept and proposed the concept of multi-principal high-entropy alloys, defining high-entropy alloys as consisting of five or more main elements, each with a molar fraction of 5%. Within the range of -35%, the alloy formed after a certain synthesis process. A large number of experimental studies have shown that, unlike traditional alloys that form intermetallic compounds or other complex phases, high-entropy alloys will produce high-entropy effects to inhibit the formation of intermetallic compounds, thereby promoting the mixing of elements to form solid solutions with simple phase structures (mainly fcc (Face Center Cubic / Face-Centered Cubic, face-centered cubic lattice) or b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C1/02
CPCC22C30/02C22C1/02
Inventor 彭文屹连世海刘聪邓晓华
Owner NANCHANG UNIV
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