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High-entropy alloy with high strength and toughness and preparation method thereof

A high-entropy alloy and toughness technology, applied in the field of high-entropy alloys and their preparation, can solve the problems of poor matching of strength and toughness of high-entropy alloys, and achieve the effects of good safety, simple and reliable preparation methods, and convenient acquisition

Active Publication Date: 2016-07-13
北京中辰至刚科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the poor matching of strength and toughness of existing high-entropy alloys, one of the purposes of the present invention is to provide a high-entropy alloy with both strength and toughness. The high-entropy alloy has excellent mechanical properties and better matching of strength and toughness; The second is to provide a method for preparing a high-entropy alloy with both strength and toughness. The method is simple and reliable, has good safety and high economic value

Method used

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  • High-entropy alloy with high strength and toughness and preparation method thereof
  • High-entropy alloy with high strength and toughness and preparation method thereof
  • High-entropy alloy with high strength and toughness and preparation method thereof

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Embodiment 1

[0035] A method for preparing a high-entropy alloy having both strength and toughness, the high-entropy alloy being Al in molar ratio 0.5 Cr 0.9 Fe 0.8 Ni 1.5 V 0.1 ; The specific steps of the method are as follows:

[0036] (1) Utilize No. 60 SiC sandpaper and grinder to remove surface impurities and oxides of elemental Al, Cr, Fe, Ni and V, then use acetone to clean, and weigh Al, Cr, Fe, Ni and V with a total mass of 80g, And ultrasonic cleaning twice;

[0037] (2) Put Al, Cr, Fe, Ni and V after ultrasonic cleaning in a high-vacuum non-consumable arc melting furnace, under the protection of argon, at a vacuum degree of less than or equal to 1.0×10 ﹣3 Carry out arc melting under MPa to obtain alloy liquid, stir and cool to obtain alloy ingot;

[0038] (3) Repeat the arc melting, stirring and cooling process in the step (1) after the alloy ingot is turned over;

[0039] (4) repeat step (3) 2 times, obtain the Al described in the present embodiment 0.5 Cr 0.9 Fe 0.8 ...

Embodiment 2

[0046] A method for preparing a high-entropy alloy having both strength and toughness, the high-entropy alloy being Al in molar ratio 0.5 Cr 0.9 FeNi 2.5 V 0.2 ; The specific steps of the method are as follows:

[0047] (1) Utilize No. 60 SiC sandpaper and grinder to remove surface impurities and oxides of elemental Al, Cr, Fe, Ni and V, then use acetone to clean, and weigh Al, Cr, Fe, Ni and V with a total mass of 80g, And ultrasonic cleaning twice;

[0048] (2) Put Al, Cr, Fe, Ni and V after ultrasonic cleaning in a high-vacuum non-consumable arc melting furnace, under the protection of argon, at a vacuum degree of less than or equal to 1.0×10 ﹣3 Carry out arc melting under MPa to obtain alloy liquid, stir and cool to obtain alloy ingot;

[0049] (3) Repeat the arc melting, stirring and cooling process in the step (1) after the alloy ingot is turned over;

[0050] (4) repeat step (3) 2 times, obtain the Al described in the present embodiment 0.5 Cr 0.9 FeNi 2.5 V 0...

Embodiment 3

[0057] A method for preparing a high-entropy alloy having both strength and toughness, the high-entropy alloy being AlCrFeNi in molar ratio 3.0 V 0.3 ; The specific steps of the method are as follows:

[0058] (1) Utilize No. 60 SiC sandpaper and grinder to remove surface impurities and oxides of elemental Al, Cr, Fe, Ni and V, then use acetone to clean, and weigh Al, Cr, Fe, Ni and V with a total mass of 80g, Ultrasonic cleaning twice;

[0059] (2) Put Al, Cr, Fe, Ni and V after ultrasonic cleaning in a high-vacuum non-consumable arc melting furnace, under the protection of argon, at a vacuum degree of less than or equal to 1.0×10 ﹣3 Carry out arc melting under MPa to obtain alloy liquid, stir and cool to obtain alloy ingot;

[0060] (3) Repeat the arc melting, stirring and cooling process in the step (1) after the alloy ingot is turned over;

[0061] (4) repeat step (3) 3 times, obtain AlCrFeNi described in the present embodiment 3.0 V 0.3 High entropy alloys.

[0062...

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Abstract

The invention discloses a high-entropy alloy with high strength and toughness and a preparation method thereof, and belongs to the field of metallic materials. The high-entropy alloy is AlaCrbFecNidVe according to a mole ratio; the method comprises: firstly, putting Al, Cr, Fe, Ni and V into a melting furnace, performing electric arc melting at a certain vacuum degree under the protection of a gas to obtain alloy liquid, and performing stirring and cooling to obtain an alloy ingot; and overturning the alloy ingot, and then performing electric arc melting, stirring and cooling to obtain the AlCrFeNiV high-entropy alloy. The high-entropy alloy is simple in structure, excellent in mechanical property, and relatively good in strength and toughness matching; and the method is simple and reliable, and is good in safety and high in economic value.

Description

technical field [0001] The invention relates to a high-entropy alloy with both strength and toughness and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] High-entropy alloys are a new class of alloys developed on the basis of new alloy design concepts in recent years. It consists of four or more main elements, to which secondary elements can be added accordingly. The molar content of each main element is greater than 5%, and the molar content of secondary added elements is less than 5%. Different from the single principal element of traditional alloys, multi-principal high-entropy alloys have unique high-entropy effects, large lattice distortion effects, hysteretic diffusion effects and cocktail effects. These characteristics make high-entropy alloys have excellent comprehensive mechanical properties, and high-entropy alloys break through the development limit of a single principal element of traditional alloys, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C30/00C22C1/02
CPCC22C1/02C22C1/023C22C19/058C22C30/00
Inventor 薛云飞程宝元王鲁王亮曹堂清马丽莉
Owner 北京中辰至刚科技有限公司
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