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High-plasticity non-necking high-entropy alloy and preparation method thereof

A high-entropy alloy and high-plastic technology, which is applied in the field of high-plasticity non-necked high-entropy alloy and its preparation, can solve the problem of tensile data hindering the practical application of high-entropy alloy, less attention to tensile properties, high-entropy alloy retention, etc. problem, to achieve the effect of excellent room temperature plasticity, improved strength and plasticity, and uniform distribution of strain field

Inactive Publication Date: 2017-05-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a lack of high-entropy alloy components with high plasticity.
[0004] At present, the main research object of high-entropy alloys is alloy ingots smelted in electric arc furnaces. Due to the limitation of alloy size, little attention has been paid to the tensile properties, and the lack of tensile data has also seriously hindered the practical application of high-entropy alloys. Entropy alloys have been stuck in the state of experimental research

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  • High-plasticity non-necking high-entropy alloy and preparation method thereof
  • High-plasticity non-necking high-entropy alloy and preparation method thereof
  • High-plasticity non-necking high-entropy alloy and preparation method thereof

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Embodiment 1

[0043] This embodiment discloses a high plasticity, no necking high entropy alloy, its general formula is: CoFeNi 2 V 0.5 Mo 0.2 , wherein, a=1, b=1, c=2, d=0.5, e=0.2, and the ratio is mole percent. The alloy was solidified without electromagnetic stirring. The purity of the Co, Fe, Ni, V and Mo raw materials are all higher than 99.5wt.%.

[0044] The CoFeNi 2 V 0.5 Mo 0.2 The preparation method of high entropy alloy is:

[0045] S1: Batching, mechanically remove the scale on the surface of each metal raw material before batching, and clean it with alcohol in an ultrasonic instrument; the total weight of each alloy ingot is 2.5kg, of which Co 532.24g, Fe 504.37g, Ni 1060.08g, V230.03g, Mo 173.29g. Place the prepared metal raw materials inside the pre-dried BN furnace, place the high melting point and volatile Mo and V metals in the lower part of the crucible, and place other Co, Fe and Ni metals with relatively low melting points and good fluidity Place on top of the...

Embodiment 2

[0053] This embodiment discloses a high plasticity, no necking high entropy alloy, its general formula is: CoFeNi 2 V 0.5 Mo 0.2 , wherein, a=1, b=1, c=2, d=0.5, e=0.2, and the ratio is mole percent. The purity of the Co, Fe, Ni, V and Mo raw materials are all higher than 99.5wt.%.

[0054] During the pouring process, when the molten metal is completely poured into the MgO mold covered with coils, the 50Hz AC power supply is turned on, and the electromagnetic induction effect caused by it acts to stir the molten metal, and the power is turned off after the molten metal is completely solidified.

[0055] The CoFeNi 2 V 0.5 Mo 0.2 The preparation method of high entropy alloy is:

[0056] S1: Batching. Before batching, use mechanical method to remove the oxide skin on the surface of each metal raw material, and clean it with alcohol in an ultrasonic instrument. The total weight of each alloy ingot is 2.5kg, including Co 532.24g, Fe504.37g, Ni 1060.08g, V230.03g, Mo 173.29g...

Embodiment 3

[0066] This embodiment discloses a high plasticity, no necking high entropy alloy, its general formula is: CoFeNi 2 V 0.5 Mo 0.6 , wherein, a=1, b=1, c=2, d=0.5, e=0.6, and the ratio is mole percent. The purity of the Co, Fe, Ni, V and Mo raw materials are all higher than 99.5wt.%.

[0067] The CoFeNi 2 V 0.5 Mo 0.6 The preparation method of high entropy alloy is:

[0068] S1: Batching. Before batching, use mechanical method to remove the oxide skin on the surface of each metal raw material, and clean it with alcohol in an ultrasonic instrument. The total weight of each alloy ingot is 2.5kg, including 445.02g of Co, 421.72g of Fe, 886.37g of Ni, 384.67g of V, and 362.23g of Mo. Place the prepared raw materials inside the pre-dried BN furnace, place the Mo and V metals with high melting points and volatiles in the lower part of the crucible, and place other Co, Fe and Ni metals with relatively low melting points and good fluidity. on top of the crucible.

[0069] S2: P...

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Abstract

The invention provides a high-plasticity non-necking high-entropy alloy which is characterized by comprising the element of Co, Fe, Ni, V and Mo in mole percent. The general formula of the high-entropy alloy is CoaFebNicVdMoe, wherein a is equal to 0.5-2.5; b is equal to 0.5-2.5; c is equal to 1.8-2.5; d is equal to 0.2-1.0; and e is equal to 0.2-1.2. The high-entropy alloy is high in plasticity and relatively high in strength within the wide temperature range. The invention further discloses a preparation method of the above high-entropy alloy. The preparation method comprises the following steps in sequence: material blending; preparation before melting; and melting and casting. The high-entropy alloy provided by the invention has the advantage of being high in plasticity and relatively high in strength within the wide temperature range; and the preparation method is easy to operate, safe, reliable, economical and practical.

Description

technical field [0001] The invention relates to the field of metal materials and their preparation, in particular to a high-plasticity non-neck high-entropy alloy and a preparation method thereof. Background technique [0002] High-entropy alloys are a new class of alloys that have developed rapidly in recent years. The first paper on high-entropy alloys [YehJ.W., Chen S.K., Lin S.J., et al., Nanostructured high entropy alloys with multiple principal elements: novel alloy design concepts and outcomes[J].Advanced Engineering Materials,2004,6(5):299-303.】It is mentioned that high entropy alloy is composed of more than 5 main elements in equimolar ratio or nearly equimolar ratio. Generally speaking, the high mixing entropy effect of high-entropy alloys will promote the formation of solid solution phases, but experiments have shown that intermetallic compound phases often appear in the microstructure of high-entropy alloys. The sole factor of microorganization. The atomic size...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02B22D27/02
CPCB22D27/02C22C1/02C22C30/00
Inventor 蒋丽曹志强姜慧卢一平王同敏李廷举
Owner DALIAN UNIV OF TECH
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