A method of improving the force magnetic property of alcocrcufeni high entropy alloy by using magnetic field

A high-entropy alloy and magnetic property technology, applied in the field of high-entropy alloys, can solve the problems of increasing strength and plasticity at the same time, and reducing the yield strength of AlCoCrCuFeNi high-entropy alloys.

Active Publication Date: 2020-12-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods will reduce the yield strength of the AlCoCrCuFeNi high-entropy alloy while improving the plasticity, and still cannot get rid of the contradiction of simultaneously improving the strength and plasticity.

Method used

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  • A method of improving the force magnetic property of alcocrcufeni high entropy alloy by using magnetic field
  • A method of improving the force magnetic property of alcocrcufeni high entropy alloy by using magnetic field
  • A method of improving the force magnetic property of alcocrcufeni high entropy alloy by using magnetic field

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Effect test

Embodiment 1

[0045] This embodiment is a method for improving the mechanical and magnetic properties of an AlCoCrCuFeNi high-entropy alloy by using a magnetic field.

[0046] The strength of the magnetic field is 2T.

[0047] The concrete steps of this embodiment are as follows:

[0048] Step 1. Alloy preparation: For ingredients, select Al, Co, Cr, Cu, Fe and Ni with a purity of not less than 99.9%; the Al, Co, Cr, Cu, Fe and Ni are solid pure raw materials. Said Al:Co:Cr:Cu:Fe:Ni=1:1:1:1:1:1 ingredients. This ratio is an atomic ratio.

[0049] Use mechanical methods to grind and remove the scale of each raw material, clean it with alcohol, put it into the crucible of the vacuum non-consumable electric arc furnace, use the vacuum non-consumable arc melting method, close the furnace door, and evacuate to 1×10 -3 Pa and then recoil high-purity argon to 0.04 ~ 0.06MPa. After arcing, the titanium ingot is melted to absorb residual oxygen in the furnace. The Al, Co, Cr, Cu, Fe and Ni are ...

Embodiment 2

[0057] This embodiment is a method for improving the mechanical and magnetic properties of an AlCoCrCuFeNi high-entropy alloy by using a magnetic field.

[0058] The magnetic field strength is 4T.

[0059] The concrete steps of this embodiment are as follows:

[0060] Step 1. Alloy preparation: For ingredients, select Al, Co, Cr, Cu, Fe and Ni with a purity of not less than 99.9%; the Al, Co, Cr, Cu, Fe and Ni are solid pure raw materials. Said Al:Co:Cr:Cu:Fe:Ni=1:1:1:1:1:1 ingredients. The stated ratios are atomic ratios.

[0061] Use mechanical methods to grind and remove the scale of each raw material, clean it with alcohol, put it into the crucible of the vacuum non-consumable electric arc furnace, use the vacuum non-consumable arc melting method, close the furnace door, and evacuate to 1×10 -3 Pa and then recoil high-purity argon to 0.04-0.06MPa; after arcing, first melt the titanium ingot to absorb the residual oxygen in the furnace, then melt each pure metal, and tur...

Embodiment 3

[0068] This embodiment is a method for improving the mechanical and magnetic properties of an AlCoCrCuFeNi high-entropy alloy by using a magnetic field.

[0069] The magnetic field strength is 10T.

[0070] The concrete steps of this embodiment are as follows:

[0071] Step 1. Alloy preparation: For ingredients, select Al, Co, Cr, Cu, Fe and Ni with a purity of not less than 99.9%; the Al, Co, Cr, Cu, Fe and Ni are solid pure raw materials. Said Al:Co:Cr:Cu:Fe:Ni=1:1:1:1:1:1 ingredients. The stated ratios are atomic ratios.

[0072]Use mechanical methods to grind and remove the scale of each raw material, clean it with alcohol, put it into the crucible of the vacuum non-consumable electric arc furnace, use the vacuum non-consumable arc melting method, close the furnace door, and evacuate to 1×10 -3 Pa and then recoil high-purity argon to 0.04-0.06MPa; after arcing, first melt the titanium ingot to absorb the residual oxygen in the furnace, then melt each pure metal, and tur...

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Abstract

The invention provides a method for improving the mechanical and magnetic properties of an AlCoCrCuFeNi high-entropy alloy through a magnetic field. The method includes the steps that Al, Co, Cr, Cu,Fe and Ni raw materials are smelted through a vacuum non-consumable electric arc smelting method, and an AlCoCrCuFeNi high-entropy alloy button ingot is obtained. An obtained high-entropy alloy buttonis placed in the magnetic field of 2-10 T for vacuum solidification, the yield strength sigma<y> of the obtained AlCoCrCuFeNi high-entropy alloy is 777-952 MPa, the tensile strength sigma is 1633-1903 MPa, the hardness is 374-413 HV, the saturation magnetization M<s> is 26.4-34.5 emu / g, and the shape of a solidification structure of the AlCoCrCuFeNi high-entropy alloy has no significant change. According to the method for improving the mechanical and magnetic properties of the AlCoCrCuFeNi high-entropy alloy through the magnetic field, the magnetic field is applied to the solidification process of the high-entropy alloy, and the purpose of simultaneously improving the mechanical and magnetic properties of the AlCoCrCuFeNi high-entropy alloy is achieved.

Description

technical field [0001] The invention relates to the field of high-entropy alloys, in particular to a method for simultaneously improving the mechanical and magnetic properties of AlCoCrCuFeNi high-entropy alloys by using a magnetic field. Background technique [0002] High-entropy alloy is a new type of alloy material with a unique design concept proposed in the early 21st century. It is a solid solution alloy formed by mixing five or more elements in equimolar ratio or near equimolar ratio. The survey found that high-entropy alloys have high specific strength, good thermal stability and low-temperature toughness, and excellent fatigue resistance. These excellent properties make them have great application potential as high-temperature and low-temperature structural materials. Applications include ship engines, storage of liquefied natural gas and hydrogen. [0003] The AlCoCrCuFeNi high-entropy alloy is one of the earliest high-entropy alloy systems to be studied. The surv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F3/02C22C30/02C22C1/02
CPCC22C1/02C22C30/02C22F3/02
Inventor 李金山王嘉祥王军王毅寇宏超唐斌
Owner NORTHWESTERN POLYTECHNICAL UNIV
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